Instruction/ maintenance manual of the product IMAC DV, Apple
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Service Source K iMac, iMac D V , iMac D V Special Edition Updated 11 July 2005.
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Service Source K Basics iMac, iMac D V , iMac D V Special Edition.
Basics Overview - 1 Ov ervie w Pr oduct Description A completely new iMac, redesigned from top to bottom, inside and out—and available in three new models: iMac, iMac DV, and iMac DV Special Edition.
Basics Overview - 2 mirrored RGB out, FireWire ports, and digital video technology to name a few.
Basics New Technologies - 3 Ne w T echnologies AirP ort Wir eless Networking The iMac, iMac DV, and iMac DV Special Edition computers support wireless networking using the optional AirPort wireless networking card.
Basics New Technologies - 4 In addition, to access another computer network or Internet service provider, users need to connect a wireless access device to their network.
Basics New Technologies - 5 V GA Output P ort The iMac DV and iMac DV Special Edition computer includes a port for an external video monitor, so you can mirror, or show, what’s on the computer display to a larger audience. The external monitor supports only the display sizes that are available on the internal monitor.
Basics Features - 6 Features Pr ocessor There are three shipping configurations: iMac (good), iMac DV (better), and iMac DV Special Edition (best). • 350-MHz (good) or 400-MHz (better/best) Power PC.
Basics Features - 7 Memory • 64 MB SDRAM (good/better), 128 MB SDRAM (best) of PC-100 SDRAM (168-pin, running at 100 MHz • two DIMM slots support up to 512 MB of PC-100 SDRAM DIMMS Storage • one.
Basics Features - 8 Graphics Support • ATI RAGE 128 VR 4x 2D and 3D acceleration • 8 MB video SGRAM, which supports 3D features and millions of colors • 15-pin VGA connector for mirrored RGB out port (better/best) Communication • 11 MB wireless-ready (antenna in enclosure) technology • 56K V.
Basics Features - 9 I/O • one 10/100 Mbps Ethernet RJ-45 connector for connection to either a 10Base-T or 100Base-TX hub networks • two external USB ports, 12 Mbps per port • two FireWire ports,.
Basics Features - 1 0 iMac Models Comparison CPU Speed • Original iMac: 233 MHz • Rev-B iMac: 233 MHz • 5-color iMacs: 266 MHz or 333 MHz • iMac, iMac DV, iMac DV Special Edition: 350 MHz (goo.
Basics Features - 1 1 System Bus Speed • Original iMac: 66 MHz • Rev-B iMac:66 MHz • 5-color iMacs: 66 MHz • iMac, iMac DV, iMac DV Special Edition: 100 MHz Main Memory • Original iMac: 32 M.
Basics Features - 1 2 Graphics Controller Chip • Original iMac: ATI RAGE IIc • Rev-B iMac: ATI RAGE Pro • 5-color iMacs: ATI RAGE Pro Turbo • iMac, iMac DV, iMac DV Special Edition: ATI RAGE 1.
Basics Features - 1 3 Hard Disk Drive • Original iMac: 4 G B • Rev-B iMac: 4 G B • 5-color iMacs: 6 G B • iMac, iMac DV, iMac DV Special Edition: 6 GB (iMac), 10 GB (iMac DV) or 13 GB (iMac DV.
Basics Features - 1 4 Data Ports • Original iMac: U S B • Rev-B iMac: USB • 5-color iMacs: USB • iMac, iMac DV, iMac DV Special Edition: USB; optional FireWire Communication F eatures • Orig.
Basics Views - 1 5 Vi e w s Fr ont, Side, and Rear V iew.
Basics Views - 1 6 I/O Panel with Fir eWir e.
Basics Views - 1 7 I/O Panel without Fir eWir e.
Basics Views - 1 8 iMac Logic Board.
Basics Repair Strategy/Warranty - 1 9 Repair Strate gy/W arranty Strategy and Ordering The iMac (350 MHz), iMac DV, and iMac DV Special Edition includes a 1-year complimentary carry-in warranty. Service the computer through module exchange and parts replacement.
Basics Repair Strategy/Warranty - 2 0 Large businesses, universities, and K-12 accounts must provide a purchase order on all transactions, including orders placed through the AppleOrder (U.
Basics Repair Strategy/Warranty - 2 1 For U.S. inquiries, please call Service Provider Support (800-919-2775, option 1). Canadian Ordering Canadian service providers not enrolled in ARIS may fax their orders to Service Provider Support in Canada (800- 903-5284).
Basics Repair Strategy/Warranty - 2 2 and AppleCare repairs. For pricing information, refer to Service Price Pages. Canada Only The iMac, iMac DV, and iMac DV Special Edition computers are covered under AppleCare. The Extended AppleCare Service Plan is also available for these products.
Service Source K Specifications iMac, iMac D V , iMac D V Special Edition.
Specifications Introduction - 1 Introduction Specifications information for this product can be found in the Spec Database, which you can access at Service Source Online (http://service.
Service Source K Troubleshooting iMac, iMac DV, iMac DV Special Edition.
Troubleshooting Introduction - 1 Introduction This chapter contains basic theory of operations information as well as detailed Symptom/Cure tables, both of which should help you troubleshoot and repair the iMac, iMac DV and iMac DV Special Edition systems.
Troubleshooting Block Diagram - 2 Block Diagram The following illustration provides an overview of the iMac inter- nal components and shows how they are connected.
Troubleshooting Power Flow/ - 3 Power Flow Power is controlled in the iMac system by the power/analog board. Once the unit is plugged in, power flows from the AC outlet at the wall to the AC inlet on the power/analog board.
Troubleshooting Testing for Power - 4 Testing for Power The iMac requires trickle voltage (+5 TRKL) in order to power- on. If you are experiencing power problems in the iMac unit, you will want to test for trickle power to pinpoint the location of the problem and to determine whether or not the power supply/analog board is functioning normally.
Troubleshooting Testing for Power - 5 At the Logic Board With the iMac placed with the CRT face down on a soft surface, remove the bottom housing and the EMI cover to access the logic board. Testing J9 for +5 V Trickle Power on the Logic Board You will need a volt meter to test for power on the logic board.
Troubleshooting Testing for Power - 6 Testing DCO (Down Converter On) Voltage at C10 on the Logic Board In a No Power situation, first check for +5 V trickle power at J9 (refer to “Testing J9 for +5 V Trickle Power on the Logic Board”), then check the DCO (Down Converter On) voltage on the logic board at capacitor C10 (see figure below).
Troubleshooting Testing for Power - 7 Testing J7 for Voltage on the Logic Board The following voltages measure if the down converter is providing the required voltages and are only present if the system is pow- ered on. If the following voltages are not correct, refer to the “No Power” troubleshooting symptom chart.
Troubleshooting Testing for Power - 8 Testing the Power/Analog Board Fuse First remove the bottom housing, front outer bezel, and the top rear housing to access the power/analog board. The fuse is located near the AC plug. Warning: You must unplug the iMac to do a continuity test at the power supply board fuse.
Troubleshooting The PMU Chip - 9 The PMU Chip The PMU (Power Management Unit) is a microcontroller chip that controls all power functions for the computer. The PMU is a computer within a computer. It has memory, software, firmware, I/O, two crystals, and a CPU.
Troubleshooting Resetting the PMU on the Logic Board - 1 0 Resetting the PMU on the Logic Board Resetting the PMU (Power Management Unit) on the logic board can resolve many system problems. Whenever you have a unit that fails to power up, you should follow this procedure before replacing any modules.
Troubleshooting Power-On Self Test - 1 1 Power-On Self Test There is a power-on self test that resides in the ROM of the iMac. This test automatically runs whenever the iMac is powered on after being fully shut down (the power-on self test does not run if the machine is only restarted).
073-0593 Re v . A iMac Verifying a Defective Power/Analog/Video Board Many of the po wer/analog/video boards returned to Apple as “bad” or “DOA” hav e no trouble f ound at the repair facility . It is impor tant to verify a def ective pow er/analog/video board properly before ordering a replacement.
Verifying a Defective Power/Analog/Video Board - 2 2. Make sure the video board is properly seated on the CR T neck (see Figure 2). The top picture shows the video board improperly seated; the bottom picture shows it properly seated.
Verifying a Defective Power/Analog/Video Board - 3 3. Check the connection of the RGB cab le to the logic board. (see Figure 3). Figure 3 RGB Cable Connection 4.
Troubleshooting Power Button - 1 2 Power Button The power button on the front of the iMac (see Table 1 below) will power up the computer, or put it to sleep, but it will not shut the iMac down. Note: When the iMac is in Sleep mode, the amber LED pulses on and off.
Troubleshooting Logic Board Battery - 1 3 Logic Board Battery Important: Apple highly recommends removing the battery when handling the logic board. Make sure to use proper ESD protection when handling modules. The battery on the logic board controls the stored system settings, such as date and time.
Troubleshooting Ejecting a CD or DVD Disc, Part 1 - 1 4 Ejecting a CD or DVD Disc, Part 1 The CD/DVD eject mechanism is electrical rather than mechanical on the iMac. If you wish to eject a bootable CD-ROM disc at startup, simply hold down the mouse button until it ejects.
Troubleshooting Ejecting a CD or DVD Disc, Part 2 - 1 5 Ejecting a CD or DVD Disc, Part 2 There are two internal levers on a slot-loading CD-DVD drive that help center a CD-DVD disc. Some CDs and DVDs have and uneven edge which can cause enough friction to prevent the disc from ejecting.
Troubleshooting HFS Plus Formatted Drives - 1 6 HFS Plus Formatted Drives The hard drive in the iMac is formatted with HFS Plus (also referred to as Mac OS Extended format). It is important to note that Norton Utilities version 3.5 is not compatible with HFS Plus (or Mac OS Extended format), and in fact, can destroy data on the hard drive.
Troubleshooting Testing the Modem - 1 7 Testing the Modem The iMac ships with AppleWorks software, which can be used to test the iMac modem connection. You should run this test if the modem is not able to dial out. To perform this test: 1. Locate and launch AppleWorks.
Troubleshooting Testing the Modem - 1 8 A good test to see if the phone line is working is to type “ATDT”, which will open the phone line. If the modem reports NO DIAL- TONE, there isn't a valid analog line connected.
Troubleshooting Symptom/Cure Tables:Startup Problems Before the Finder Symptom/Cure Tables:Startup Problems Before the Finder Appears If you have trouble starting up the iMac, and the problem occurs before the Finder appears on the screen, you may have either a software or a hardware problem.
Troubleshooting Symptom/Cure Tables:Startup Problems Before the Finder Appears No Power In a “No Power” situation, the system is completely dead. There is no LED, no hard drive power, and the screen is completely black.
Troubleshooting Symptom/Cure Tables:Startup Problems Before the Finder Appears Bad power/analog/video board -Verify the fuse at F901 on the power/analog board is good. (Refer to “Testing for Power at the Power/ Analog Board Fuse” mentioned earlier in this chapter.
Troubleshooting Symptom/Cure Tables:Startup Problems Before the Finder Appears No Video or Unstable Raster Normal startup boot chime, the LED is on, and the hard drive starts up. The display, however, is solid gray. Possible Cause Possible Fix Corrupted PRAM.
Troubleshooting Symptom/Cure Tables:Startup Problems Before the Finder Appears Bad power/analog/video board - Check for trickle power on the logic board (Refer to “Testing J9 for +5 V Trickle Power on the Logic Board” mentioned earlier in this chapter).
Troubleshooting Symptom/Cure Tables:Startup Problems Before the Finder Gray Screen In a “Gray Screen Raster” situation, you will get a normal startup boot chime and the system will have a green LED. The display, however, will have a solid gray screen with no cursor or desktop displayed.
Troubleshooting Symptom/Cure Tables:Startup Problems Before the Finder Error Beep(s) If you hear from one to five error beeps at startup with no boot chime, you have a hardware problem. The table explains how to troubleshoot and repair an iMac unit that sounds one or more error beeps at startup.
Troubleshooting Symptom/Cure Tables:Startup Problems Before the Finder Appears Flashing Question Mark This problem refers to a flashing question mark that appears on the screen during star- tup. Possible Cause Possible Fix Corrupted system software or software drivers.
Troubleshooting Symptom/Cure Tables:Startup Problems Before the Finder Appears System Hangs During Boot This problem refers to a system that begins a normal startup process with a boot chime and normal display, but then freezes before the Finder appears.
Troubleshooting Symptom/Cure Tables:Startup Problems Before the Finder Appears External device is bad. Disconnect all external devices (USB and Ethernet).
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 2 9 Symptom/Cure Tables: System Problems After Startup If you experience system problems after a successful startup (i.e., after the Finder appears on the screen), most likely the problem is not with the iMac hardware (with the exception of some possible RAM issues).
Power Macintosh 7500 Symptom Charts - 3 0 System Hangs Refer to this table if your system intermittently hangs (freezes) during normal oper- ation. Note : if your system only hangs when using a specific application, the problem is most likely with the application and not with your iMac hardware or system soft- ware.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 3 1 Distorted Video Distorted Video refers to a problem with the screen geometry or focus. Possible Cause Possible Fix System is out of focus. Adjust the focus using the Display Adjustment Utility on the MacTest Pro CD.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 3 2 Thin White Line A a thin, white horizontal line scrolls from top to bottom, or bottom to top on the iMac display.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 3 3 Tinting Video Tinting Video refers to a predominant color tint or color covering the screen.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 3 4 Garbage Video Garbage video refers to erroneous text or characters that appear on the screen. Possible Cause Possible Fix Corrupted system soft- ware. Boot from the system CD that came with the unit.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 3 5 Intermittent Shut Down or Sleep An iMac with a sticking power button can generate unpredictable behavior. The iMac randomly shuts itself off or puts itself to sleep. The iMac will not start up from either the front power button or the keyboard.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 3 6 Memory Error Dialog If you see a error dialog message pertaining to memory after you have a successful startup sequence (that is, a normal boot tone with no error beeps and proper video display, etc.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 3 7 Can’t Wake From Sleep The computer cannot be brought out of “sleep” mode by pressing a key on the key- board. The problem is usually evident by a black screen and a pulsing amber LED.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 3 8 Network Problems Refer to this troubleshooting table if you are unable to switch to the Ethernet network option in the control panel or if you are unable to see any network devices.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 3 9 CD_ROM or DVD-ROM Vibration CD-ROM or DVD-ROM vibration is typically caused by unbalanced discs when spinning at higher speeds in the internal CD-ROM or DVD-ROM drive. This vibration may cause the drive to have difficulty reading the disc.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 4 0 CD-ROM or DVD-ROM Won’t Eject CD-ROM or DVD-ROM disc won’t eject from the slot. Possible Cause Possible Fix Bad CD-ROM or DVD-ROM disc. 1 Press and hold down the mouse buton on startup.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 4 1 Uneven edge of the CD or DVD drive. There are two internal levers on a slot-loading CD-DVD drive that help center a CD-DVD disc. Some CDs and DVDs have and uneven edge which can cause enough friction to prevent the disc from ejecting.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 4 2 CD-ROM or DVD-ROM Not Showing on Desktop CD-ROM and DVD-ROM problems are defined by the inability to see the CD or DVD on the desktop or to open a CD or DVD that is loaded into the drive.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 4 3 Hard Drive Problems Hard drive problems include a hard drive that doesn’t operate (it doesn’t spin) or a hard drive that doesn’t mount (it doesn’t appear on the desktop).
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 4 4 Sound Out Problems Sound out problems refer to a lack of sound coming from the internal speakers (located on the front of the unit directly below the display), external speakers (connected via the I/O panel to the speaker connector on the logic board), or both.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 4 5 Sound In Problems Sound in problems involve the internal microphone. Symptoms could be: audio record- ing quality is poor, a high level of background noise is noticeable, or no sound is recorded.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 4 6 Noise From Computer After Shutdown After the computer is shutdown, the computer emits a loud humming or buzzing noise that may continue for minutes or until the power cord is removed.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 4 7 USB Problems USB problems refer to symptoms or issues that may occur with external USB devices that are attached to the iMac. This could include Apple and/or third-party USB devices.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 4 8 USB driver missing. This error message indicates the device's driver is miss- ing. Customers will need to check the instructions that came with the device and install the Mac OS driver.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 4 9 Cursor Problems This section deals with a cursor that moves on the screen, but clicking the mouse has no effect or double-clicking the mouse does not open an application, disk or server.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 5 0 USB Printer Problems This troubleshooting table deals with an iMac that cannot print to an attached, known- good USB printer. Possible Cause Possible Fix Printer is not compatible with the iMac USB bus.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 5 1 Networked Printer Problems This troubleshooting table deals with an iMac that cannot print to an attached, known- good networked printer. Possible Cause Possible Fix Bad network connections.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 5 2 Modem Not Recognized This table should help you troubleshoot and fix problems when the internal modem is not recognized. Follow the instructions under the “Possible Fix” column to resolve the problem.
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 5 3 Modem Dialing Problems If the modem is having problems dialing out, refer to the table below for possible fixes. The table is divided into different sections, each with its own symptom and cure(s).
Service Source K T ake Apart iMac, iMac D V , iMac D V Special Edition.
Take Apart - 1 T ools The following tools are recommended for procedures in this chapter: • phillips screwdriver (#1 and #2) • a stubby (short) phillips screwdriver • plastic flatblade screwdriv.
Take Apart Bottom Housing With Flip Foot - 2 Procedures Bottom Housing With Flip F oot Before you begin, position the computer face down, resting the computer on an ESD mat or other soft surface.
Take Apart Bottom Housing With Flip Foot - 3 1 . Remove the two screws near the flip foot. 2 . Using a plastic flatblade screwdriver, pry the VGA vented cover off the bottom housing to access two more screws. Note: There are two service parts for the vented cover.
Take Apart Bottom Housing With Flip Foot - 4 4 . Remove the two outer screws located near the video out port. Note: The bottom housing uses two sizes of screws.
Take Apart Bottom Housing With Flip Foot - 5 5 . Lift the bottom housing from the computer..
Take Apart Bottom Housing With Flip Foot - 6 6. Replacement Caution: Align the three tabs on the bottom housing with the tab slots on the front outer bezel. Ensure that the center tab is properly aligned or CDs and DVD discs may not eject from the slot.
Take Apart EMI Cover - 7 EMI Cov er Before you begin: • Position the computer upside down, resting the computer on an ESD mat or other soft surface. • Remove the bottom housing.
Take Apart EMI Cover - 8 1 . Remove the six screws on the EMI cover..
Take Apart EMI Cover - 9 2 . Lift the EMI cover off the computer. Note: Be careful of the VGA output port (if present)..
Take Apart EMI Cover - 1 0 Replacement Note: Position the rear of the EMI cover into place first, positioning the EMI cover over the video port (if present). Continue lowering the cover into place by gently squeezing in on both sides, as you lower the cover into position.
Take Apart SDRAM DIMM - 1 1 SDRAM DIMM Before you begin, position the computer face down, resting the CRT on an ESD mat or other soft surface..
Take Apart SDRAM DIMM - 1 2 1 . With a flatbade screwdriver or coin, turn the colored latch counterclockwise on the access door. 2 . Open the access door.
Take Apart SDRAM DIMM - 1 3 3 . Push down on the plastic tabs to release the SDRAM module(s). 4 . Carefully lift the SDRAM from the slot. Note: Remove installed SDRAM from the logic board before returning the logic board to Apple.
Take Apart AirPort Card - 1 4 AirP ort Card Before you begin, position the computer face down, resting the CRT on an ESD mat or other soft surface. Note: If the AirPort Card is not installed, a protective antenna cap will be attached to the antenna.
Take Apart AirPort Card - 1 5 1 . With a flatbade screwdriver or coin, turn the colored latch to open the access door. The antenna and AirPort Card will be visible when you open the access door.
Take Apart AirPort Card - 1 6 2 . Remove the AirPort Card (which sits in the adapter card) from the card guides and AirPort connector..
Take Apart AirPort Card - 1 7 3 . Disconnect the antenna from the small hole AirPort Card..
Take Apart AirPort Card - 1 8 4 . Remove the ground clip from the AirPort Adapter Card. 5 . Using the pull tab, separate the AirPort Card from the adapter card.
Take Apart CD/HD Carrier - 1 9 CD/HD Carrier Before you begin, position the computer upside down, resting the computer on an ESD mat or other soft surface and remove the following: • bottom housing .
Take Apart CD/HD Carrier - 2 0 1 . Remove the four screws (two on each side) connecting the CD/HD drive carrier to the divider panel (the metal chassis).
Take Apart CD/HD Carrier - 2 1 2 . Disconnect the following cables fro the back of the CD/HD carrier: • hard drive power cable • hard drive data cable • CD-ROM/DVD-ROM data cable • logic board.
Take Apart CD/HD Carrier - 2 2 3. Tilt the CD/HD carrier forward and lift the carrier out of the computer. Note: Continue with the Take Apart procedures if you are replacing the CD-ROM, DVD-ROM, or the hard drive.
Take Apart CD-ROM / DVD-ROM - 2 3 CD-R OM / D VD-ROM Note: The procedures for removing a CD-ROM or DVD-ROM are identical. This procedure will reference the CD-ROM Take Apart.
Take Apart CD-ROM / DVD-ROM - 2 4 1. Using a Phillips screwdriver, remove the CD/HD carrier mounting screws (two on each side)..
Take Apart CD-ROM / DVD-ROM - 2 5 2. Carefully turn the CD/HD drive carrier over. 3 . Holding onto the CD-ROM from the rear, lift the CD-ROM carrier out of the CD/HD carrier. Important: Don’t press or squeeze the front of the CD-ROM. Squeezing the front could bend the metal housing, making it impossible to insert or remove a CD or DVD disc.
Take Apart CD-ROM / DVD-ROM - 2 6 4 . Using a jeweler’s screwdriver, remove the four screws (two on each side) on the CD/ DVD carrier. 5 . Lift the CD-ROM from its carrier.
Take Apart CD-ROM / DVD-ROM - 2 7 6 . On the back of the CD- ROM, use a jeweler’s screwdriver to remove the two screws on the adapter board. 7 . Remove the adapter board from the CD-ROM. Note: Return the CD- ROM or DVD-ROM drive to Apple without the cables, carrier, or the adapter board.
Take Apart CD-ROM / DVD-ROM - 2 8 Manual Eject Button The CD/DVD eject mechanism is electrical rather than mechanical on the iMac. If you wish to eject a bootable CD-ROM disc at startup, simply hold down the mouse button until it ejects. If the CD is not a bootable disc, simply wait for the iMac to boot and drag the CD icon to the trash can.
Take Apart CD-ROM / DVD-ROM - 2 9 paper clip. The button is located on the right side of the CD slot. Note that the power must be on to eject a CD using this method. Once you eject the CD, it will extend just past the center hole in the disc to facilitate the safe removal of the disc from the drive.
Take Apart CD-ROM / DVD-ROM - 3 0 CD-R OM or DVD-R OM Module Replacement Position the CD-ROM or DVD-ROM into its carrier as shown. 1 . Check that the yellow warning label is face up. Note: if you are installing a new CD/DVD carrier, remove the blue film covering the grounding pad.
Take Apart CD-ROM / DVD-ROM - 3 1 2 . Lower the CD/DVD carrier into the CD/HD carrier. 3 . Push the CD/DVD carrier forward so the carrier tabs go through the holes on the CD/HD carrier.
Take Apart CD-ROM / DVD-ROM - 3 2 5 . As a final check, t hi s i s a front view of the CD- ROM or DVD-ROM correctly installed into the CD/HD carrier..
Take Apart CD/DVD Adapter Board - 3 3 CD/D VD Adapter Board Before you begin, position the computer upside down, resting the computer on an ESD mat or other soft surface and remove the following: • .
Take Apart CD/DVD Adapter Board - 3 4 1 . Using a jeweler’s screwdriver, remove the two screws on the CD/DVD adapter board. 2 . Remove the adapter board from the back of the CD-ROM. Note: Return the CD/DVD- ROM drive to Apple without the cables, carrier, or the adapter board.
Take Apart Hard Drive - 3 5 Hard Driv e Before you begin, position the computer upside down, resting the computer on an ESD mat or other soft surface and remove the following: • bottom housing • E.
Take Apart Hard Drive - 3 6 1. Using a #1 Phillips screwdriver, remove the four hard drive mounting screws. Note: Support the hard drive with one hand so the hard drive doesn’t fall out of the carrier.
Take Apart Hard Drive - 3 7 2 . Remove the hard drive from the CD/HD carrier. Note: Return the drives without the cables or carriers. Exchange Apple hard drive modules in Apple packaging. Failure to comply with this requirement may result in a packaging noncompliance charge.
Take Apart Hard Drive - 3 8 Hard Drive Replacement When installing the hard drive into the CD/HD carrier, make sure the hard drive is component side up (as shown).
Take Apart Logic Board - 3 9 Logic Board Before you begin, position the computer upside down, resting the computer on an ESD mat or other soft surface and remove the following: • bottom housing • .
Take Apart Logic Board - 4 0 Note: Remove SDRAM to make cable removal easier. 1 . On the back of the CD/HD carrier,disconnect the: • hard drive power cable • hard drive data cable • CD-ROM/DVD-ROM data cable • logic board cable connector 2 .
Take Apart Logic Board - 4 1 3 . Remove the five screws on the logic board and five screws on the down converter board. Note: The two screws located at the top of the down converter board (near the speakers) are larger screws than the other screws.
Take Apart Logic Board - 4 2 4 . Gently lift the down converter board and logic board out of the computer..
Take Apart Logic Board - 4 3 5 . Using a flatblade screwdriver, pry the plastic rivet off the board. Put the top half of the rivet back into the bottom half so it doesn’t get lost.
Take Apart Logic Board - 4 4 6 . Holding onto the down converter, press down on the black connector to separate the down converter board from the logic board. Note: If you are returning the logic board to Apple refer to the parts database and remove the SDRAM, any cables, the modem, the AirPort Card, and I/O panel.
Take Apart Logic Board - 4 5 Identifying 350 MHz Logic Boards (661-2210) There are two 350 MHz logic boards in service stock under the part number 661-2210. One board has an expansion board (daughterboard) and the other does not have the expansion board.
Take Apart Logic Board - 4 6 Identifying the V ersion 2, 350 MHz Logic Board The Version 2 board and the more recent 661- 2210 logic board (without the daughterboard) look identical, apart from the revision number on the VLSI chip. Refer to the next page for a close-up of the VLSI chip on the Version 2 board.
Take Apart Logic Board - 4 7 The Version 2 board (661-2317) will have a revision number of - 09 or -0A on the VLSI chip (as shown). Refer to the Parts Database and the Exploded View chapter, “Identifying the 350 MHz Logic Board” for more information.
Take Apart Logic Board - 4 8 Identifying the 400 MHz Logic Boards There is a new version of the 400 MHz logic board for the iMac DV and iMac Special Edition. The easiest way to identify the boards is by the daughterboard. The new Version 2 logic board (661-2316) does not have a daughterboard.
Take Apart Down Converter Board - 4 9 Down Con verter Board Before you begin, position the computer upside down, resting the computer on an ESD mat or other soft surface and remove the following: • .
Take Apart Down Converter Board - 5 0 Note: Remove SDRAM to make cable removal easier. 1 . On the back of the CD/HD carrier, disconnect the: • hard drive power cable • hard drive data cable • CD-ROM/DVD-ROM data cable • logic board cable connector 2 .
Take Apart Down Converter Board - 5 1 3 . Remove the five screws on the logic board and five screws on the down converter board. Note: The two down converter screws located near the speaker are larger screws than the rest of the down converter screws.
Take Apart Down Converter Board - 5 2 4 . Lift the boards out of the computer..
Take Apart Down Converter Board - 5 3 5 . Using a flatblade screwdriver, pry the rivet off the logic board. Put the top half of the rivet back into the bottom half so it doesn’t get lost.
Take Apart Down Converter Board - 5 4 6 . Holding onto the boards, press down on the black connector and separate the down converter board from the logic board. Replacement Note: When reinstalling the logic board, make sure the antenna wire is not underneath the board.
Take Apart Modem - 5 5 Modem Before you begin, position the computer upside down, resting the computer on an ESD mat or other soft surface and remove the following: • bottom housing • EMI cover • logic board Note: The modem is located on the underside of the logic board.
Take Apart Modem - 5 6 1 . With the logic board facing right side up, disconnect the cable at J12. 2 . Remove the two screws on the I/O panel..
Take Apart Modem - 5 7 3 . Turn the logic board to the underside and remove the modem screw..
Take Apart Modem - 5 8 4 . Rotate the logic board right side up again. Carefully slide the I/O panel off the logic board. Note: As you slide the I/ O panel off the logic board, support the modem with your other hand so the modem doesn’t fall off the logic board.
Take Apart Modem - 5 9 Modem Replacement The I/O panel and the modem are sandwiched between the logic board and the metal frame of the I/O panel. The metal frame fits on top of the logic board, over the screw holes.
Take Apart I/O Panel - 6 0 I/O Panel Before you begin, position the computer upside down, resting the computer on an ESD mat or other soft surface and remove the following: • bottom housing • EMI .
Take Apart I/O Panel - 6 1 1 . Disconnect the cable at J12, going from the logic board to the I/O panel. 2 . Remove the two screws on the I/O panel..
Take Apart I/O Panel - 6 2 3 . Turn the logic board over and remove the modem screw..
Take Apart I/O Panel - 6 3 4 . Rotate the logic board face up again and carefully slide the I/O panel off the logic board. Note: As you slide the I/ O panel off the logic board, support the modem with your hand so the modem doesn’t fall off the logic board.
Take Apart Front Outer Bezel - 6 4 Fr ont Outer Bezel Before you begin, place the computer on an ESD mat and remove the bottom housing..
Take Apart Front Outer Bezel - 6 5 1. With a jeweler’s screwdriver, carefully remove the two tabs on the front outer bezel. Refer to the next graphic for a close-up of the tab removal.
Take Apart Front Outer Bezel - 6 6 2 . After removing the tabs, remove the screws located under the tabs..
Take Apart Front Outer Bezel - 6 7 Note: The bezel tabs fit tightly into the rear housing. A good, hard pull upward is required to release all the tabs. 3 . Insert a plastic tool underneath the bezel. 4 . Pry the outer bezel tabs from the rear housing with a plastic tool.
Take Apart Front Outer Bezel - 6 8 6 . As the tabs start to release, pull hard on the front outer bezel to release the tabs completely..
Take Apart Top Rear Housing - 6 9 T op Rear Housing ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Top Rear Housing - 7 0 1 . Remove the two tabs (screw caps) on the top inner bezel. Refer to the next page for a close-up of the tab removal.
Take Apart Top Rear Housing - 7 1 2 . Pry the tabs off, and remove the two screws under each tab..
Take Apart Top Rear Housing - 7 2 3 . Position the computer face down. 4 . Remove four screws and loosen the fixed screw (at the top) on the rear housing.
Take Apart Top Rear Housing - 7 3 5 . Position the computer right side up. Push down and pull out on the rear housing to unhook the rear housing tabs that connect to the inner bezel.
Take Apart Top Rear Housing - 7 4 6 . Lift the top rear housing off the computer..
Take Apart Divider Panel - 7 5 Divider P anel Note: The divider panel is only the metal chassis with EMI foam, part number 922-4044. Many service parts, such as the speakers, power/ analog/video board, side panels, cables, and the headphone board, are connected to the divider panel.
Take Apart Divider Panel - 7 6 ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Divider Panel - 7 7 1 . Disconnect the microphone connector located near the top of the CRT. 2 . Disconnect the anode cap. 3 . Unwrap the bendable degauss cable wraps in the upper left and upper right corners of the CRT.
Take Apart Divider Panel - 7 8 4 . Lift the degauss cable out of the way to access the side panel screws. 5 . Using a narrow shaft screwdriver, remove the four side panel screws (two on each side).
Take Apart Divider Panel - 7 9 6 . Open the CRT cable clamps. Remove the wires from the cable clamps..
Take Apart Divider Panel - 8 0 7. Partially lift the side panels (with the power/ analog/video board attached to the divider panel) up and off the inner bezel to gain access to connector P501 on the power/ analog/video board.
Take Apart Divider Panel - 8 1 8 . Disconnect P501 and P701 on the power/ analog/video board. The cables are located near the high voltage capacitor..
Take Apart Divider Panel - 8 2 9 . On the other side of the CRT neck, disconnect the brown degauss cable, P901, from the power/ analog/video board. 1 0 .
Take Apart Divider Panel - 8 3 1 1 . At the very bottom of the power/analog/video board, near the bottom of the CRT, disconnect P902, which is part of the audio/ headphone/ LED/ speaker cable assembly.
Take Apart Divider Panel - 8 4 1 2 . Disconnect the two black ground cables going to the video board. Caution: Be careful when working around the CRT neck rings. If the neck rings are bumped, the CRT will be knocked out of adjustment, and will require replacement of the CRT.
Take Apart Divider Panel - 8 5 1 3 . Loosen the CRT neck clamp screw..
Take Apart Divider Panel - 8 6 1 4 . Carefully pull the video board off the CRT neck..
Take Apart Divider Panel - 8 7 1 5 . Lift and remove the entire divider panel assembly off the inner bezel. Note: Continue with the Take Apart procedure to remove the service parts from the divider panel.
Take Apart Divider Panel - 8 8 1 6 . R emove the following parts to replace the divider panel shown on the next page..
Take Apart Divider Panel - 8 9 1 7 . This is the divider panel, service part number 922-4044..
Take Apart Power/Analog/Video Board - 9 0 P ower/Analog/V ideo Board Before you begin, discharge the CRT, rest the computer on an ESD mat or other soft surface and remove the following: • bottom housing • front outer bezel • top rear housing Note: There is a new power/analog/video board, part number 661-2315, Rev.
Take Apart Power/Analog/Video Board - 9 1 ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, discharge the CRT. 1 . Disconnect the microphone connector located near the top of the CRT. 2 . Disconnect the anode cap.
Take Apart Power/Analog/Video Board - 9 2 4 . Lift the degauss cable out of the way to access the side panel screws. 5 . Using a narrow shaft screwdriver, remove two screws (on each side ) that attach the side panels to the inner bezel. Note: Don’t remove the CRT screws in the four corners.
Take Apart Power/Analog/Video Board - 9 3 6. Partially lift the side panels up to gain access to connectors P501 and P701 located near the bottom of the power/ analog/video board (see next graphic).
Take Apart Power/Analog/Video Board - 9 4 7 . Disconnect P501 and P701 on the power/ analog/video board. The cables are located near the high voltage capacitor.
Take Apart Power/Analog/Video Board - 9 5 8 . On the other side of the CRT neck, disconnect P901 (the brown cable) from the power/analog/ video board. 9 .
Take Apart Power/Analog/Video Board - 9 6 1 0 . At the very bottom of the power/analog/video board, near the bottom of the CRT, disconnect P902..
Take Apart Power/Analog/Video Board - 9 7 1 1 . Disconnect the two ground cables from the video board. Caution: Be careful when working around the CRT neck rings. If the neck rings are bumped, the CRT will be knocked out of adjustment, and will require replacement of the CRT.
Take Apart Power/Analog/Video Board - 9 8 1 2 . Loosen the CRT neck clamp screw..
Take Apart Power/Analog/Video Board - 9 9 1 3 . Carefully pull the video board off the CRT neck..
Take Apart Power/Analog/Video Board - 1 0 0 1 4 . Holding on to the side panels, lift the power/ analog/video board from the inner bezel..
Take Apart Power/Analog/Video Board - 1 0 1 1 5 . Remove the ten screws and pinch the two standoffs to lift the power/analog board off the divider panel.
Take Apart Power/Analog/Video Board - 1 0 2 1 6 . Lift the board up and out, (off the divider panel) lifting the board toward the speakers. Replacement Note: If you’re returning the power/ analog/video board to Apple leave the cables attached to the board.
Take Apart Power/Analog/Video Board - 1 0 3 Identifying the Rev . 2 Po wer/Analog/Video Board There is a new revision of the power/analog/video board. The part number is 661-2315, Rev.
Take Apart Power/Analog/Video Board - 1 0 4 Important: The switch must be set for the type of the CRT (LG or CPT) in the computer. If the Rev. 2 power/analog/ video board or the CRT are replaced, make sure to set the switch to the appropriate position.
Take Apart Power/Analog/Video Board - 1 0 5 One way to quicky identify an LG CRT is by the black sticker located on the left side of the CRT. The sticker covers the LG label.
Take Apart Side Panels - 1 0 6 Side Panels ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Side Panels - 1 0 7 1 . Undo the wire wraps in the top corners or the CRT. 2 . Lift the degauss cable out of the way to access the side panel screws.
Take Apart Side Panels - 1 0 8 3 . On the rear of the side panels, remove four screws. These screws connect the side panels to the divider panel (the metal chassis).
Take Apart Side Panels - 1 0 9 4 . At the top rear of the side panels, pull each side panel off the plastic pin. (The left and right side panels are identified when viewing the computer from the rear.) Note: To separate the left panel from the right panel, remove the rear bracket.
Take Apart Side Panels - 1 1 0 5 . Pull the panels out to the sides a bit, and then lift the side panels up and off the computer..
Take Apart Side Panels - 1 1 1 6 . Carefully remove the antenna wire from each side panel. 7 . Pull the side panel off the metal divider panel. If necessary, repeat these steps for the other side panel.
Take Apart Antenna - 1 1 2 Antenna ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Antenna - 1 1 3 • bottom housing • front outer bezel • top rear housing • divider panel assembly.
Take Apart Antenna - 1 1 4 1 . Remove the three screws and cable clip on the antenna..
Take Apart Antenna - 1 1 5 2. Important: Note how the antenna wire is routed through the side panel before removing. A close-up view of the right panel antenna is shown here.
Take Apart Antenna - 1 1 6 3 . Carefully remove the antenna from the left side panel..
Take Apart Antenna - 1 1 7 4 . Before removing the antenna from the divider panel, mark the hole (with a pen tip) that the antenna passes through so you know which hole the antenna goes into when replacing the antenna. 5 . Lift the antenna board from the divider panel.
Take Apart S peakers - 1 1 8 Speakers Before you begin, rest the computer on an ESD mat or other soft surface, and remove the bottom housing. The EMI coveris removed in this photo, but it is not necessary to remove it to access the speakers. Note: Service parts package speakers as a kit.
Take Apart S peakers - 1 1 9 1 . Disconnect the short speaker cable next to the speaker. 2. Note: If you are certain a speaker is faulty, the easiest removal method is to gently push the speaker down in the direction of the arrow. This will bend the biggest tab (there are three tabs) that connects the speaker to the divider panel.
Take Apart Headphone Board - 1 2 0 Headphone Board ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Headphone Board - 1 2 1 1 . Turn the divider panel over. 2 . Remove the speaker to access the headphone/ audio board screw. 3. Using a stubby (short) screwdriver, remove the screw. 4 . Disconnect the connector from the heaphone board. 5 . Remove the headphone board from the divider panel.
Take Apart Power/LED Board - 1 2 2 P ower/LED Board ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Power/LED Board - 1 2 3 1 . Turn the divider panel over and remove the speaker to access the power/LED board screw. 2 . Using a stubby screwdriver, remove the screw. 3 . Disconnect the cable from the connector. 4 . Remove the power/LED board from the divider panel.
Take Apart CRT - 1 2 4 CR T ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart CRT - 1 2 5 1 . Remove the four CRT screws and the ground wire. 2 . Lift the CRT from the inner bezel. Caution: Be careful when working around the CRT neck rings. If the neck rings are bumped, the CRT will be knocked out of adjustment, and will require replacement of the CRT.
Take Apart CRT - 1 2 6 Replacing the CR T CR T Notice, July 2005 Two vendors (LG and CPT) previously supplied the CRT for all iMac computers with a slot-loading CD-ROM, DVD-ROM, or CD-RW drive. As of July 2005, Apple Service will carry only the CRT supplied by CPT (shown) for the Northern Hemisphere (922-3877).
Take Apart CRT - 1 2 7 Southern Hemisphere (922-3878) and Equatorial (922-3879) regions until further notice. Refer to Knowledge Base article 95060: “iMac: How to Identify CRT in Models With Slot-Loading Disc Drives” for more information.
Take Apart CRT - 1 2 8 1 . When you replace the CRT, identify if the computer has an LG or Hon Hai power/analog board installed. • Hon Hai boards have a switch at SW901 (see graphic). • LG boards do not have a switch at SW901 and are not compatible with the CPT CRT.
Take Apart CRT - 1 2 9 2 . If you have an LG board, (shown on the left) you need to order a Hon Hai board: 661-2465 or 661-2315. 3 . Set the switch on the Hon Hai board, SW901 to CPT.
Take Apart CRT - 1 3 0 Switch Settings f or the LG CR T If you have an LG CRT, and a Hon Hai power/analog board, set the switch on the Hon Hai board to LG. One way to quickly identify an LG CRT is by the black sticker located on the left side of the CRT.
Take Apart Microphone - 1 3 1 Micr ophone ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Microphone - 1 3 2 1 . Disconnect the microphone connector. If you can’t access the microphone connector, unwrap the bendable degauss cable wrap.
Take Apart Microphone - 1 3 3 Replacing the Microphone 1 . Insert the microphone into the inner bezel with the loop facing down, toward the CRT. 2 . Push the microphone through the hole on the inner bezel (see photo on the next page).
Take Apart Microphone - 1 3 4 3 . Check that the microphone protrudes through the inner bezel hole..
Adjustments Adjustment Tools - 1 Adjustment T ools The following items are needed to perform video adjustments on the slot- loading iMacs: • Display Adjustment Utility 4.0 • jumper adjustment tool (922-4165) • light meter Model R77 The utility can be found on the Service Source CD or online at: http:// service.
Adjustments Adjustment Tools - 2 Light Meter Setup This topic covers setup for light meter Model R77, service part number 076- 0310. Note: The adjustments were optimized for light meter Model R77. To obtain more consistent color results, use only the R77 light meter when performing color adjustments on the slot-load iMac.
Adjustments Adjustment Tools - 3 Model R77 Before you begin, remove the 10X multiplier plate from the lens. Three scales are shown on the light meter: • 200-1000 fc • 50-250 fc • 10-50 fcT Because display screen luminance typically ranges from 10 to 50 fc, take readings from the bottom scale only.
Adjustments Adjustment Tools - 4 To measure a display screen’s luminance, 1 . Set the scale switch to the bottom position (to set up the 10-50 fc scale).
Adjustments Adjustment Tools - 5 If you suspect the light meter is giving false readings, verify the readings with a known-good light meter or photometer. Also check the age of the R77 light meter by its four-digit manufacturing date stamp (such as 0398 for March 1998).
Adjustments Adjustment Tools - 6 Jumper Adjustment T ool The jumper adjustment tool (922-4165) must be installed to save cutoff and white balance adjustments to the factory space. Continue with the procedures for instructions on installing the jumper.
Adjustments Adjustment Tools - 7 ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety. 1 . Remove the bottom housing and the top rear housing to access the video board.
Adjustments Adjustment Tools - 8 2. With the power off, remove the left ground cable from the video board..
Adjustments Adjustment Tools - 9 3 . Connect one end of the jumper adjustment tool (922-4165) to the video board pin. 4 . Connect the other end to one of the ground pins.
Adjustments Focus Adjustment - 1 0 F ocus Adjustment ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety. 1 . Remove the bottom housing and the top rear housing to access the focus potentiometer on the flyback transformer.
Adjustments Focus Adjustment - 1 1 2 . Power on the iMac. 3 . Open the Display Adjustment Utility and select the Focus test pattern from the Pattern menu.
Adjustments Focus Adjustment - 1 2 4 . Adjust the focus control on the flyback transformer until the focus test pattern reaches the best front- of-screen performance.
Adjustments Screen Voltage Setup - 1 3 Screen V oltage Setup ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Adjustments Screen Voltage Setup - 1 4 1 . Remove the bottom housing and the top rear housing to access the flyback transformer that contains the screen voltage potentiometer.
Adjustments Screen Voltage Setup - 1 5 2. With the power off, remove the left ground cable from the video board..
Adjustments Screen Voltage Setup - 1 6 3 . Connect the jumper adjustment tool (922- 4165) to the video board pin. Refer to the “Jumper Adjustment Tool” procedure mentioned earlier in this section. Without the jumper installed, cutoff and white balance adjustments cannot be saved.
Adjustments Screen Voltage Setup - 1 7 5 . Open the Display Adjustment Utility and select the Color tab. 6 . Set the Contrast to maximum and the Brightness to midrange.
Adjustments Screen Voltage Setup - 1 8 8 . Select the Gray Bars test pattern from the Pattern menu..
Adjustments Screen Voltage Setup - 1 9 9 . Looking at the Gray Bar test pattern, turn the screen voltage knob on the flyback transformer until: • the first bar is black • the second bar is barely visible • the third bar is a dark gray Note: The surrounding raster should also be black.
Adjustments Cutoff Adjustment - 2 0 Cutof f Adjustment ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Adjustments Cutoff Adjustment - 2 1 Set the Screen Voltage if you haven’t done so already. Refer to “Screen Voltage Setup” mentioned earlier in this section. 1 . Remove the bottom housing and the top rear housing to access the video board. 2. With the power off, remove the left ground cable from the video board.
Adjustments Cutoff Adjustment - 2 2 3 . Connect the jumper adjustment tool (see graphic). Refer to “Jumper Adjustment Tool” mentioned earlier in this section. 4 . Power on the computer. Make sure the monitor has been on for at least 10 minutes before making adjustments.
Adjustments Cutoff Adjustment - 2 3 5 . Open the Display Adjustment Utility and select the Color tab. 6 . Set the drive and cutoff controls to their midpoint positions. Note: The Revert and Save buttons are normally dimmed until a slider bar is moved.
Adjustments Cutoff Adjustment - 2 4 used if all the color drive controls are set to zero, and the screen is completely black. The Command-R function has the same function as Color Revert (from the File menu) and the Revert button on the Color tab window.
Adjustments Cutoff Adjustment - 2 5 7 . Select the Gray Bars test pattern from the Pattern menu..
Adjustments Cutoff Adjustment - 2 6 Note: This procedure should be performed in a dimly lit room. 8 . Look at the Gray Bar Test pattern. • The bars should have no predominant color. • The leftmost bar should be black. • The second bar from the left should be barely visible.
Adjustments Cutoff Adjustment - 2 7 9 . Select the Color tab window. 1 0 . Adjust the red, green, and blue cutoff controls until the second bar (from the left) on the Gray Bars test pattern is barely visible and there is no predominant color.
Adjustments Cutoff Adjustment - 2 8 1 1 . If there is a predominant color in the three bars on the left, continue adjusting the color controls accordingly until there is no predominant color. When you are finished, you should see shades ranging from black and white.
Adjustments Cutoff Adjustment - 2 9 1 2 . Click the Save button to save your adjustments. 1 3 . Proceed to the white balance adjustment..
Adjustments White Balance - 3 0 White Balance Before you begin, make sure the: • cutoff is set correctly • monitor has been on for at least 10 minutes. • jumper adjustment tool is connected to the video board (refer to “Jumper Adjustment Tool” mentioned earlier in this section).
Adjustments White Balance - 3 1 1 . Open the Display Service Utility and select the Gray Bars test pattern from the Pattern menu..
Adjustments White Balance - 3 2 2 . Adjust the red, green, and blue drive controls until there is no predominant color..
Adjustments White Balance - 3 3 3. Select “White” from the Pattern menu to display the all-white test pattern. 4 . Hold the light meter against the center of the all-white screen. The screen luminance reading should be 33± 5fc (foot candles) on the light meter Model R77.
Adjustments White Balance - 3 4 5 . Click the Save button to save your settings. 6 . Restart the computer and reset the parameter RAM (PRAM) to apply the newly saved cutoff and white balance adjustments to the Factory Setting.
Adjustments White Balance - 3 5 Note: If you don’t restart the computer, the iMac will display the last settings made on the iMac. 7 . Open the Monitors control panel.
Adjustments White Balance - 3 6 9 . Click the Factory Settings button..
Adjustments Geometry Adjustments - 3 7 Geometry Adjust- ments Before you begin, connect the jumper adjustment tool to the video board (refer to the “Jumper Adjustment Tool” mentioned earlier in this section.
Adjustments Geometry Adjustments - 3 8 1 . Open the Display Adjustment Utility. 2 . Select the Geometry tab..
Adjustments Geometry Adjustments - 3 9 3 . Select a resolution for adjustment from the Resolution menu. Note: Don’t use the control strip or Monitors control panel to set the resolution.
Adjustments Geometry Adjustments - 4 0 4 . Adjust the geometry settings by moving the appropriate slider bar. 5 . Click the Save button to save the adjustments for that resolution. Note: Repeat steps 2-4 (for each resolution) when adjusting width, height, horizontal, vertical, keystone, and pincushion.
Adjustments Geometry Adjustments - 4 1 7 . To reset the PRAM, hold down the <Command><Option><P> and <R> keys after Restart is selected from the Special menu. Note: If you don’t restart the computer, the iMac will display the previous user geometry settings made on the iMac.
Adjustments Geometry Adjustments - 4 2 1 0 . Click on the Factory Settings button in the Geometry window. 1 1 . Close the Monitor control panel. Note: Rotation, Parallelogram, Pincushion Balance, and S Correction adjustments are resolution independent.
Adjustments S Correction Adjustment - 4 3 S Correction Adjustment 1 . Open the Display Adjustment Utility and select “White Grid” from the Pattern menu. 2 . Check that all the squares on the White Grid test pattern appear equal in size. If the squares look fine, there is no need for this adjustment.
Adjustments S Correction Adjustment - 4 4 3 . Open the Display Adjustment Utility, and select the Geometry tab. 4 . If the squares need adjusting, move the S Correction slider bar. 5 . Select the White Grid test pattern again from the Pattern menu and check that all the squares on the White Grid test pattern appear equal in size.
Adjustments S Correction Adjustment - 4 5 6 . When all the squares look uniform on the S Correction test pattern, go back to the Geometry tab window and click the Save button. 7 . Restart the computer and reset the parameter RAM (PRAM) to save these adjustments to the Factory Setting.
Adjustments S Correction Adjustment - 4 6 Note: If you don’t restart the computer, the iMac will display the last settings made on the iMac. 8 . Open the Monitors control panel.
Adjustments S Correction Adjustment - 4 7 1 0 . Click on the Factory Settings button in the Geometry window. Note: Before returning the iMac to the customer, display the focus test pattern again and verify that the focus is acceptable after all of the adjustments have been completed.
Adjustments Sticking Power Button - 4 8 Sticking Po wer Button Apple has found that the largest contributor to a stuck power button is an improperly aligned front power-on LED.
Adjustments Sticking Power Button - 4 9 from either the front power button or the keyboard • Intermittent shut down or sleep: the computer will randomly shut itself off or put itself to sleep Apple has taken steps to resolve the LED alignment issue in slot-loading iMacs with serial numbers equal to or greater than xxx008xxxxxx.
Adjustments Sticking Power Button - 5 0 Repair Order. Enter the adjustment part number 011-0206, “Power Button/LED Alignment” into the appropriate section in AppleOrder.
Adjustments LED Alignment Procedure - 5 1 LED Alignment Procedure 1 . Remove the four screws that secure the bottom housing to the computer..
Adjustments LED Alignment Procedure - 5 2 2 . Lift the bottom housing off the computer..
Adjustments LED Alignment Procedure - 5 3 3 . Position the iMac so that it is directly in front of you. 4 . Looking straight on at the inner power button, determine if the LED is centered in the middle of the inner power button (as shown in the graphic).
Adjustments LED Alignment Procedure - 5 4 5 . If the LED is not centered properly (as shown in the top graphic), use a small plastic video alignment tool (see bottom graphic) to gently coerce the LED so that it is centered in the middle of the inner button.
Adjustments LED Alignment Procedure - 5 5 7 . Replace the bottom housing, making sure to align the tabs on the front. 8 . If the button continues to stick after the LED has been properly aligned, you may have to lightly sand the inner bezel. Sand the area surrounding the inner button to reduce the contact between the inner button and inner bezel.
Adjustments LED Alignment Procedure - 5 6 Inner Bezel Sanding 1 . Remove the inner power button so that the LED is exposed, as shown in the graphic. 2. Using a 180 grit or higher (Silicon Carbide) wet/dry sandpaper, lightly sand the edge of the lower section of the button recess (indicated by the red arrows).
Adjustments LED Alignment Procedure - 5 7 slight uniform radius around the entire edge of the button recess. 3 . Clean out the inner button recess making sure to remove any debris that may have deposited during the sanding process. 4. Reinstall the inner button and spring.
Adjustments LED Alignment Procedure - 5 8 adjustment part number 011-0206, “Power Button/LED Alignment” into the appropriate section in AppleOrder.
Take Apart Down Converter Board - 5 4 6 . Holding onto the boards, press down on the black connector and separate the down converter board from the logic board. Replacement Note: When reinstalling the logic board, make sure the antenna wire is not underneath the board.
Take Apart Modem - 5 5 Modem Before you begin, position the computer upside down, resting the computer on an ESD mat or other soft surface and remove the following: • bottom housing • EMI cover • logic board Note: The modem is located on the underside of the logic board.
Take Apart Modem - 5 6 1 . With the logic board facing right side up, disconnect the cable at J12. 2 . Remove the two screws on the I/O panel..
Take Apart Modem - 5 7 3 . Turn the logic board to the underside and remove the modem screw..
Take Apart Modem - 5 8 4 . Rotate the logic board right side up again. Carefully slide the I/O panel off the logic board. Note: As you slide the I/ O panel off the logic board, support the modem with your other hand so the modem doesn’t fall off the logic board.
Take Apart Modem - 5 9 Modem Replacement The I/O panel and the modem are sandwiched between the logic board and the metal frame of the I/O panel. The metal frame fits on top of the logic board, over the screw holes.
Take Apart I/O Panel - 6 0 I/O Panel Before you begin, position the computer upside down, resting the computer on an ESD mat or other soft surface and remove the following: • bottom housing • EMI .
Take Apart I/O Panel - 6 1 1 . Disconnect the cable at J12, going from the logic board to the I/O panel. 2 . Remove the two screws on the I/O panel..
Take Apart I/O Panel - 6 2 3 . Turn the logic board over and remove the modem screw..
Take Apart I/O Panel - 6 3 4 . Rotate the logic board face up again and carefully slide the I/O panel off the logic board. Note: As you slide the I/ O panel off the logic board, support the modem with your hand so the modem doesn’t fall off the logic board.
Take Apart Front Outer Bezel - 6 4 Fr ont Outer Bezel Before you begin, place the computer on an ESD mat and remove the bottom housing..
Take Apart Front Outer Bezel - 6 5 1. With a jeweler’s screwdriver, carefully remove the two tabs on the front outer bezel. Refer to the next graphic for a close-up of the tab removal.
Take Apart Front Outer Bezel - 6 6 2 . After removing the tabs, remove the screws located under the tabs..
Take Apart Front Outer Bezel - 6 7 Note: The bezel tabs fit tightly into the rear housing. A good, hard pull upward is required to release all the tabs. 3 . Insert a plastic tool underneath the bezel. 4 . Pry the outer bezel tabs from the rear housing with a plastic tool.
Take Apart Front Outer Bezel - 6 8 6 . As the tabs start to release, pull hard on the front outer bezel to release the tabs completely..
Take Apart Top Rear Housing - 6 9 T op Rear Housing ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Top Rear Housing - 7 0 1 . Remove the two tabs (screw caps) on the top inner bezel. Refer to the next page for a close-up of the tab removal.
Take Apart Top Rear Housing - 7 1 2 . Pry the tabs off, and remove the two screws under each tab..
Take Apart Top Rear Housing - 7 2 3 . Position the computer face down. 4 . Remove four screws and loosen the fixed screw (at the top) on the rear housing.
Take Apart Top Rear Housing - 7 3 5 . Position the computer right side up. Push down and pull out on the rear housing to unhook the rear housing tabs that connect to the inner bezel.
Take Apart Top Rear Housing - 7 4 6 . Lift the top rear housing off the computer..
Take Apart Divider Panel - 7 5 Divider P anel Note: The divider panel is only the metal chassis with EMI foam, part number 922-4044. Many service parts, such as the speakers, power/ analog/video board, side panels, cables, and the headphone board, are connected to the divider panel.
Take Apart Divider Panel - 7 6 ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Divider Panel - 7 7 1 . Disconnect the microphone connector located near the top of the CRT. 2 . Disconnect the anode cap. 3 . Unwrap the bendable degauss cable wraps in the upper left and upper right corners of the CRT.
Take Apart Divider Panel - 7 8 4 . Lift the degauss cable out of the way to access the side panel screws. 5 . Using a narrow shaft screwdriver, remove the four side panel screws (two on each side).
Take Apart Divider Panel - 7 9 6 . Open the CRT cable clamps. Remove the wires from the cable clamps..
Take Apart Divider Panel - 8 0 7. Partially lift the side panels (with the power/ analog/video board attached to the divider panel) up and off the inner bezel to gain access to connector P501 on the power/ analog/video board.
Take Apart Divider Panel - 8 1 8 . Disconnect P501 and P701 on the power/ analog/video board. The cables are located near the high voltage capacitor..
Take Apart Divider Panel - 8 2 9 . On the other side of the CRT neck, disconnect the brown degauss cable, P901, from the power/ analog/video board. 1 0 .
Take Apart Divider Panel - 8 3 1 1 . At the very bottom of the power/analog/video board, near the bottom of the CRT, disconnect P902, which is part of the audio/ headphone/ LED/ speaker cable assembly.
Take Apart Divider Panel - 8 4 1 2 . Disconnect the two black ground cables going to the video board. Caution: Be careful when working around the CRT neck rings. If the neck rings are bumped, the CRT will be knocked out of adjustment, and will require replacement of the CRT.
Take Apart Divider Panel - 8 5 1 3 . Loosen the CRT neck clamp screw..
Take Apart Divider Panel - 8 6 1 4 . Carefully pull the video board off the CRT neck..
Take Apart Divider Panel - 8 7 1 5 . Lift and remove the entire divider panel assembly off the inner bezel. Note: Continue with the Take Apart procedure to remove the service parts from the divider panel.
Take Apart Divider Panel - 8 8 1 6 . R emove the following parts to replace the divider panel shown on the next page..
Take Apart Divider Panel - 8 9 1 7 . This is the divider panel, service part number 922-4044..
Take Apart Power/Analog/Video Board - 9 0 P ower/Analog/V ideo Board Before you begin, discharge the CRT, rest the computer on an ESD mat or other soft surface and remove the following: • bottom housing • front outer bezel • top rear housing Note: There is a new power/analog/video board, part number 661-2315, Rev.
Take Apart Power/Analog/Video Board - 9 1 ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety. 1 . Disconnect the microphone connector located near the top of the CRT.
Take Apart Power/Analog/Video Board - 9 2 4 . Lift the degauss cable out of the way to access the side panel screws. 5 . Using a narrow shaft screwdriver, remove the four side panel screws (two on each side) that attach the left and right side panels to the inner bezel.
Take Apart Power/Analog/Video Board - 9 3 6 . Open the CRT cable clamps. Remove the wires from the cable clamps..
Take Apart Power/Analog/Video Board - 9 4 7. Partially lift the side panels (with the power/ analog/video board attached to the divider panel) up and off the inner bezel to gain access to connector P501 on the power/ analog/video board.
Take Apart Power/Analog/Video Board - 9 5 8 . Disconnect P501 and P701 on the power/ analog/video board. The cables are located near the high voltage capacitor.
Take Apart Power/Analog/Video Board - 9 6 9 . On the other side of the CRT neck, disconnect the brown degauss cable, P901, from the power/ analog/video board.
Take Apart Power/Analog/Video Board - 9 7 1 0 . At the very bottom of the power/analog/video board, near the bottom of the CRT, disconnect P902, which is part of the audio/headphone/ LED/speaker cable assembly.
Take Apart Power/Analog/Video Board - 9 8 1 1 . Disconnect the two ground cables on the video board. Caution: Be careful when working around the CRT neck rings. If the neck rings are bumped, the CRT will be knocked out of adjustment, and will require replacement of the CRT.
Take Apart Power/Analog/Video Board - 9 9 1 2 . Loosen the CRT neck clamp screw..
Take Apart Power/Analog/Video Board - 1 0 0 1 3 . Carefully pull the video board off the CRT neck..
Take Apart Power/Analog/Video Board - 1 0 1 1 4 . Holding on to the side panels, lift the power/ analog/video board from the inner bezel..
Take Apart Power/Analog/Video Board - 1 0 2 1 5 . Remove the ten screws and pinch the two standoffs to lift the power/analog board off the divider panel.
Take Apart Power/Analog/Video Board - 1 0 3 1 6 . Lift the board up and out, (off the divider panel) lifting the board toward the speakers. Replacement Note: If you’re returning the power/ analog/video board to Apple leave the cables attached to the board.
Take Apart Power/Analog/Video Board - 1 0 4 Identifying the Rev . 2 Po wer/Analog/Video Board There is a new revision of the power/analog/video board. The part number is 661-2315, Rev.
Take Apart Power/Analog/Video Board - 1 0 5 Important: The switch must be set for the type of the CRT (LG, Samsung, or CPT) in the computer. If the Rev. 2 power/analog/ video board or the CRT are replaced, make sure to set the switch to the appropriate position.
Take Apart Power/Analog/Video Board - 1 0 6 One way to quicky identify an LG CRT is by the black sticker located on the left side of the CRT. The sticker covers the LG label.
073-0593 Re v . A iMac Verifying a Defective Power/Analog/Video Board Many of the po wer/analog/video boards returned to Apple as “bad” or “DOA” hav e no trouble f ound at the repair facility . It is impor tant to verify a def ective pow er/analog/video board properly before ordering a replacement.
Verifying a Defective Power/Analog/Video Board - 2 2. Make sure the video board is properly seated on the CR T neck (see Figure 2). The top picture shows the video board improperly seated; the bottom picture shows it properly seated.
Verifying a Defective Power/Analog/Video Board - 3 3. Check the connection of the RGB cab le to the logic board. (see Figure 3). Figure 3 RGB Cable Connection 4.
Take Apart Side Panels - 1 0 7 Side Panels ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Side Panels - 1 0 8 1 . Undo the wire wraps in the top corners or the CRT. 2 . Lift the degauss cable out of the way to access the side panel screws.
Take Apart Side Panels - 1 0 9 3 . On the rear of the side panels, remove four screws. These screws connect the side panels to the divider panel (the metal chassis).
Take Apart Side Panels - 1 1 0 4 . At the top rear of the side panels, pull each side panel off the plastic pin. (The left and right side panels are identified when viewing the computer from the rear.) Note: To separate the left panel from the right panel, remove the rear bracket.
Take Apart Side Panels - 1 1 1 5 . Pull the panels out to the sides a bit, and then lift the side panels up and off the computer..
Take Apart Side Panels - 1 1 2 6 . Carefully remove the antenna wire from each side panel. 7 . Pull the side panel off the metal divider panel. If necessary, repeat these steps for the other side panel.
Take Apart Antenna - 1 1 3 Antenna ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Antenna - 1 1 4 • bottom housing • front outer bezel • top rear housing • divider panel assembly.
Take Apart Antenna - 1 1 5 1 . Remove the three screws and cable clip on the antenna..
Take Apart Antenna - 1 1 6 2. Important: Note how the antenna wire is routed through the side panel before removing. A close-up view of the right panel antenna is shown here.
Take Apart Antenna - 1 1 7 3 . Carefully remove the antenna from the left side panel..
Take Apart Antenna - 1 1 8 4 . Before removing the antenna from the divider panel, mark the hole (with a pen tip) that the antenna passes through so you know which hole the antenna goes into when replacing the antenna. 5 . Lift the antenna board from the divider panel.
Take Apart Speakers - 1 1 9 Speakers Before you begin, rest the computer on an ESD mat or other soft surface, and remove the bottom housing. The EMI coveris removed in this photo, but it is not necessary to remove it to access the speakers. Note: Service parts package speakers as a kit.
Take Apart Speakers - 1 2 0 1 . Disconnect the short speaker cable next to the speaker. 2. Note: If you are certain a speaker is faulty, the easiest removal method is to gently push the speaker down in the direction of the arrow. This will bend the biggest tab (there are three tabs) that connects the speaker to the divider panel.
Take Apart Headphone Board - 1 2 1 Headphone Board ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Headphone Board - 1 2 2 1 . Turn the divider panel over. 2 . Remove the speaker to access the headphone/ audio board screw. 3. Using a stubby (short) screwdriver, remove the screw. 4 . Disconnect the connector from the heaphone board. 5 . Remove the headphone board from the divider panel.
Take Apart Power/LED Board - 1 2 3 P ower/LED Board ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Power/LED Board - 1 2 4 1 . Turn the divider panel over and remove the speaker to access the power/LED board screw. 2 . Using a stubby screwdriver, remove the screw. 3 . Disconnect the cable from the connector. 4 . Remove the power/LED board from the divider panel.
Take Apart CRT - 1 2 5 CR T ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart CRT - 1 2 6 1 . Remove the four CRT screws and the ground wire. 2 . Lift the CRT from the inner bezel. Caution: Be careful when working around the CRT neck rings. If the neck rings are bumped, the CRT will be knocked out of adjustment, and will require replacement of the CRT.
Take Apart CRT - 1 2 7 CR T Switch Settings on the Rev . 2 Analog Board There is a new power/ analog/video board, part number 661-2315, Rev. 2 that has a switch at SW901 that must be set for the type of the CRT (LG, Samsung, or CPT) tube in the computer.
Take Apart CRT - 1 2 8 CRT is b y the black sticker located on the left side of the CRT. The sticker covers the LG label. In this situation, the 661- 2315, Rev.
Take Apart Microphone - 1 2 9 Micr ophone ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Microphone - 1 3 0 1 . Disconnect the microphone connector. If you can’t access the micropone connector, unwrap the bendable degauss cable wrap.
Take Apart Microphone - 1 3 1 Replacing the Microphone 1 . Insert the microphone into the inner bezel with the loop facing down, toward the CRT. 2 . Push the microphone through the hole on the inner bezel (see photo on the next page).
Take Apart Microphone - 1 3 2 3 . Check that the microphone protrudes through the inner bezel hole..
Take Apart AirPort Card - 1 8 4 . Remove the ground clip from the AirPort Adapter Card. 5 . Using the pull tab, separate the AirPort Card from the adapter card.
Take Apart CD/HD Carrier - 1 9 CD/HD Carrier Before you begin, position the computer upside down, resting the computer on an ESD mat or other soft surface and remove the following: • bottom housing .
Take Apart CD/HD Carrier - 2 0 1 . Remove the four screws (two on each side) connecting the CD/HD drive carrier to the divider panel (the metal chassis).
Take Apart CD/HD Carrier - 2 1 2 . Disconnect the following cables fro the back of the CD/HD carrier: • hard drive power cable • hard drive data cable • CD-ROM/DVD-ROM data cable • logic board.
Take Apart CD/HD Carrier - 2 2 3. Tilt the CD/HD carrier forward and lift the carrier out of the computer. Note: Continue with the Take Apart procedures if you are replacing the CD-ROM, DVD-ROM, or the hard drive.
Take Apart CD-ROM / DVD-ROM - 2 3 CD-R OM / D VD-ROM Note: The procedures for removing a CD-ROM or DVD-ROM are identical. This procedure will reference the CD-ROM Take Apart.
Take Apart CD-ROM / DVD-ROM - 2 4 1. Using a Phillips screwdriver, remove the CD/HD carrier mounting screws (two on each side)..
Take Apart CD-ROM / DVD-ROM - 2 5 2. Carefully turn the CD/HD drive carrier over. 3 . Holding onto the CD-ROM from the rear, lift the CD-ROM carrier out of the CD/HD carrier. Important: Don’t press or squeeze the front of the CD-ROM. Squeezing the front could bend the metal housing, making it impossible to insert or remove a CD or DVD disc.
Take Apart CD-ROM / DVD-ROM - 2 6 4 . Using a jeweler’s screwdriver, remove the four screws (two on each side) on the CD/ DVD carrier. 5 . Lift the CD-ROM from its carrier.
Take Apart CD-ROM / DVD-ROM - 2 7 6 . On the back of the CD- ROM, use a jeweler’s screwdriver to remove the two screws on the adapter board. 7 . Remove the adapter board from the CD-ROM. Note: Return the CD- ROM or DVD-ROM drive to Apple without the cables, carrier, or the adapter board.
Take Apart CD-ROM / DVD-ROM - 2 8 Manual Eject Button The CD/DVD eject mechanism is electrical rather than mechanical on the iMac. If you wish to eject a bootable CD-ROM disc at startup, simply hold down the mouse button until it ejects. If the CD is not a bootable disc, simply wait for the iMac to boot and drag the CD icon to the trash can.
Take Apart CD-ROM / DVD-ROM - 2 9 paper clip. The button is located on the right side of the CD slot. Note that the power must be on to eject a CD using this method. Once you eject the CD, it will extend just past the center hole in the disc to facilitate the safe removal of the disc from the drive.
Take Apart CD-ROM / DVD-ROM - 3 0 CD-R OM or DVD-R OM Module Replacement Position the CD-ROM or DVD-ROM into its carrier as shown. 1 . Check that the yellow warning label is face up. Note: if you are installing a new CD/DVD carrier, remove the blue film covering the grounding pad.
Take Apart CD-ROM / DVD-ROM - 3 1 2 . Lower the CD/DVD carrier into the CD/HD carrier. 3 . Push the CD/DVD carrier forward so the carrier tabs go through the holes on the CD/HD carrier.
Take Apart CD-ROM / DVD-ROM - 3 2 5 . As a final check, this is a front view of the CD- ROM or DVD-ROM correctly installed into the CD/HD carrier..
Take Apart CD/DVD Adapter Board - 3 3 CD/D VD Adapter Board Before you begin, position the computer upside down, resting the computer on an ESD mat or other soft surface and remove the following: • .
Take Apart CD/DVD Adapter Board - 3 4 1 . Using a jeweler’s screwdriver, remove the two screws on the CD/DVD adapter board. 2 . Remove the adapter board from the back of the CD-ROM. Note: Return the CD/DVD- ROM drive to Apple without the cables, carrier, or the adapter board.
Take Apart Hard Drive - 3 5 Hard Driv e Before you begin, position the computer upside down, resting the computer on an ESD mat or other soft surface and remove the following: • bottom housing • E.
Take Apart Hard Drive - 3 6 1. Using a #1 Phillips screwdriver, remove the four hard drive mounting screws. Note: Support the hard drive with one hand so the hard drive doesn’t fall out of the carrier.
Take Apart Hard Drive - 3 7 2 . Remove the hard drive from the CD/HD carrier. Note: Return the drives without the cables or carriers. Exchange Apple hard drive modules in Apple packaging. Failure to comply with this requirement may result in a packaging noncompliance charge.
Take Apart Hard Drive - 3 8 Hard Drive Replacement When installing the hard drive into the CD/HD carrier, make sure the hard drive is component side up (as shown).
Take Apart Logic Board - 3 9 Logic Board Before you begin, position the computer upside down, resting the computer on an ESD mat or other soft surface and remove the following: • bottom housing • .
Take Apart Logic Board - 4 0 Note: Remove SDRAM to make cable removal easier. 1 . On the back of the CD/HD carrier,disconnect the: • hard drive power cable • hard drive data cable • CD-ROM/DVD-ROM data cable • logic board cable connector 2 .
Take Apart Logic Board - 4 1 3 . Remove the five screws on the logic board and five screws on the down converter board. Note: The two screws located at the top of the down converter board (near the speakers) are larger screws than the other screws.
Take Apart Logic Board - 4 2 4 . Gently lift the down converter board and logic board out of the computer..
Take Apart Logic Board - 4 3 5 . Using a flatblade screwdriver, pry the plastic rivet off the board. Put the top half of the rivet back into the bottom half so it doesn’t get lost.
Take Apart Logic Board - 4 4 6 . Holding onto the down converter, press down on the black connector to separate the down converter board from the logic board. Note: If you are returning the logic board to Apple refer to the parts database and remove the SDRAM, any cables, the modem, the AirPort Card, and I/O panel.
Take Apart Logic Board - 4 5 Identifying 350 MHz Logic Boards (661-2210) There are two 350 MHz logic boards in service stock under the part number 661-2210. One board has an expansion board (daughterboard) and the other does not have the expansion board.
Take Apart Logic Board - 4 6 Identifying the V ersion 2, 350 MHz Logic Board The Version 2 board and the more recent 661- 2210 logic board (without the daughterboard) look identical, apart from the revision number on the VLSI chip. Refer to the next page for a close-up of the VLSI chip on the Version 2 board.
Take Apart Logic Board - 4 7 The Version 2 board (661-2317) will have a revision number of - 09 or -0A on the VLSI chip (as shown). Refer to the Parts Database and the Exploded View chapter, “Identifying the 350 MHz Logic Board” for more information.
Take Apart Logic Board - 4 8 Identifying the 400 MHz Logic Boards There is a new version of the 400 MHz logic board for the iMac DV and iMac Special Edition. The easiest way to identify the boards is by the daughterboard. The new Version 2 logic board (661-2316) does not have a daughterboard.
Take Apart Down Converter Board - 4 9 Down Con verter Board Before you begin, position the computer upside down, resting the computer on an ESD mat or other soft surface and remove the following: • .
Take Apart Down Converter Board - 5 0 Note: Remove SDRAM to make cable removal easier. 1 . On the back of the CD/HD carrier, disconnect the: • hard drive power cable • hard drive data cable • CD-ROM/DVD-ROM data cable • logic board cable connector 2 .
Take Apart Down Converter Board - 5 1 3 . Remove the five screws on the logic board and five screws on the down converter board. Note: The two down converter screws located near the speaker are larger screws than the rest of the down converter screws.
Take Apart Down Converter Board - 5 2 4 . Lift the boards out of the computer..
Take Apart Down Converter Board - 5 3 5 . Using a flatblade screwdriver, pry the rivet off the logic board. Put the top half of the rivet back into the bottom half so it doesn’t get lost.
Take Apart Down Converter Board - 5 4 6 . Holding onto the boards, press down on the black connector and separate the down converter board from the logic board. Replacement Note: When reinstalling the logic board, make sure the antenna wire is not underneath the board.
Take Apart Modem - 5 5 Modem Before you begin, position the computer upside down, resting the computer on an ESD mat or other soft surface and remove the following: • bottom housing • EMI cover • logic board Note: The modem is located on the underside of the logic board.
Take Apart Modem - 5 6 1 . With the logic board facing right side up, disconnect the cable at J12. 2 . Remove the two screws on the I/O panel..
Take Apart Modem - 5 7 3 . Turn the logic board to the underside and remove the modem screw..
Take Apart Modem - 5 8 4 . Rotate the logic board right side up again. Carefully slide the I/O panel off the logic board. Note: As you slide the I/ O panel off the logic board, support the modem with your other hand so the modem doesn’t fall off the logic board.
Take Apart Modem - 5 9 Modem Replacement The I/O panel and the modem are sandwiched between the logic board and the metal frame of the I/O panel. The metal frame fits on top of the logic board, over the screw holes.
Take Apart I/O Panel - 6 0 I/O Panel Before you begin, position the computer upside down, resting the computer on an ESD mat or other soft surface and remove the following: • bottom housing • EMI .
Take Apart I/O Panel - 6 1 1 . Disconnect the cable at J12, going from the logic board to the I/O panel. 2 . Remove the two screws on the I/O panel..
Take Apart I/O Panel - 6 2 3 . Turn the logic board over and remove the modem screw..
Take Apart I/O Panel - 6 3 4 . Rotate the logic board face up again and carefully slide the I/O panel off the logic board. Note: As you slide the I/ O panel off the logic board, support the modem with your hand so the modem doesn’t fall off the logic board.
Take Apart Front Outer Bezel - 6 4 Fr ont Outer Bezel Before you begin, place the computer on an ESD mat and remove the bottom housing..
Take Apart Front Outer Bezel - 6 5 1. With a jeweler’s screwdriver, carefully remove the two tabs on the front outer bezel. Refer to the next graphic for a close-up of the tab removal.
Take Apart Front Outer Bezel - 6 6 2 . After removing the tabs, remove the screws located under the tabs..
Take Apart Front Outer Bezel - 6 7 Note: The bezel tabs fit tightly into the rear housing. A good, hard pull upward is required to release all the tabs. 3 . Insert a plastic tool underneath the bezel. 4 . Pry the outer bezel tabs from the rear housing with a plastic tool.
Take Apart Front Outer Bezel - 6 8 6 . As the tabs start to release, pull hard on the front outer bezel to release the tabs completely..
Take Apart Top Rear Housing - 6 9 T op Rear Housing ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Top Rear Housing - 7 0 1 . Remove the two tabs (screw caps) on the top inner bezel. Refer to the next page for a close-up of the tab removal.
Take Apart Top Rear Housing - 7 1 2 . Pry the tabs off, and remove the two screws under each tab..
Take Apart Top Rear Housing - 7 2 3 . Position the computer face down. 4 . Remove four screws and loosen the fixed screw (at the top) on the rear housing.
Take Apart Top Rear Housing - 7 3 5 . Position the computer right side up. Push down and pull out on the rear housing to unhook the rear housing tabs that connect to the inner bezel.
Take Apart Top Rear Housing - 7 4 6 . Lift the top rear housing off the computer..
Take Apart Divider Panel - 7 5 Divider P anel Note: The divider panel is only the metal chassis with EMI foam, part number 922-4044. Many service parts, such as the speakers, power/ analog/video board, side panels, cables, and the headphone board, are connected to the divider panel.
Take Apart Divider Panel - 7 6 ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Divider Panel - 7 7 1 . Disconnect the microphone connector located near the top of the CRT. 2 . Disconnect the anode cap. 3 . Unwrap the bendable degauss cable wraps in the upper left and upper right corners of the CRT.
Take Apart Divider Panel - 7 8 4 . Lift the degauss cable out of the way to access the side panel screws. 5 . Using a narrow shaft screwdriver, remove the four side panel screws (two on each side).
Take Apart Divider Panel - 7 9 6 . Open the CRT cable clamps. Remove the wires from the cable clamps..
Take Apart Divider Panel - 8 0 7. Partially lift the side panels (with the power/ analog/video board attached to the divider panel) up and off the inner bezel to gain access to connector P501 on the power/ analog/video board.
Take Apart Divider Panel - 8 1 8 . Disconnect P501 and P701 on the power/ analog/video board. The cables are located near the high voltage capacitor..
Take Apart Divider Panel - 8 2 9 . On the other side of the CRT neck, disconnect the brown degauss cable, P901, from the power/ analog/video board. 1 0 .
Take Apart Divider Panel - 8 3 1 1 . At the very bottom of the power/analog/video board, near the bottom of the CRT, disconnect P902, which is part of the audio/ headphone/ LED/ speaker cable assembly.
Take Apart Divider Panel - 8 4 1 2 . Disconnect the two black ground cables going to the video board. Caution: Be careful when working around the CRT neck rings. If the neck rings are bumped, the CRT will be knocked out of adjustment, and will require replacement of the CRT.
Take Apart Divider Panel - 8 5 1 3 . Loosen the CRT neck clamp screw..
Take Apart Divider Panel - 8 6 1 4 . Carefully pull the video board off the CRT neck..
Take Apart Divider Panel - 8 7 1 5 . Lift and remove the entire divider panel assembly off the inner bezel. Note: Continue with the Take Apart procedure to remove the service parts from the divider panel.
Take Apart Divider Panel - 8 8 1 6 . R emove the following parts to replace the divider panel shown on the next page..
Take Apart Divider Panel - 8 9 1 7 . This is the divider panel, service part number 922-4044..
Take Apart Power/Analog/Video Board - 9 0 P ower/Analog/V ideo Board Before you begin, discharge the CRT, rest the computer on an ESD mat or other soft surface and remove the following: • bottom housing • front outer bezel • top rear housing Note: This shows the power/analog/video board still attached to the divider panel and the side panels.
Take Apart Power/Analog/Video Board - 9 1 ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety. 1 . Disconnect the microphone connector located near the top of the CRT.
Take Apart Power/Analog/Video Board - 9 2 4 . Lift the degauss cable out of the way to access the side panel screws. 5 . Using a narrow shaft screwdriver, remove the four side panel screws (two on each side) that attach the left and right side panels to the inner bezel.
Take Apart Power/Analog/Video Board - 9 3 6 . Open the CRT cable clamps. Remove the wires from the cable clamps..
Take Apart Power/Analog/Video Board - 9 4 7. Partially lift the side panels (with the power/ analog/video board attached to the divider panel) up and off the inner bezel to gain access to connector P501 on the power/ analog/video board.
Take Apart Power/Analog/Video Board - 9 5 8 . Disconnect P501 and P701 on the power/ analog/video board. The cables are located near the high voltage capacitor.
Take Apart Power/Analog/Video Board - 9 6 9 . On the other side of the CRT neck, disconnect the brown degauss cable, P901, from the power/ analog/video board.
Take Apart Power/Analog/Video Board - 9 7 1 0 . At the very bottom of the power/analog/video board, near the bottom of the CRT, disconnect P902, which is part of the audio/headphone/ LED/speaker cable assembly.
Take Apart Power/Analog/Video Board - 9 8 1 1 . Disconnect the two ground cables on the video board. Caution: Be careful when working around the CRT neck rings. If the neck rings are bumped, the CRT will be knocked out of adjustment, and will require replacement of the CRT.
Take Apart Power/Analog/Video Board - 9 9 1 2 . Loosen the CRT neck clamp screw..
Take Apart Power/Analog/Video Board - 1 0 0 1 3 . Carefully pull the video board off the CRT neck..
Take Apart Power/Analog/Video Board - 1 0 1 1 4 . Holding on to the side panels, lift the power/ analog/video board from the inner bezel..
Take Apart Power/Analog/Video Board - 1 0 2 1 5 . Remove the ten screws and pinch the two standoffs to lift the power/analog board off the divider panel.
Take Apart Power/Analog/Video Board - 1 0 3 1 6 . Lift the board up and out, (off the divider panel) lifting the board toward the speakers. Replacement Note: If you’re returning the power/ analog/video board to Apple leave the cables attached to the board.
Take Apart Side Panels - 1 0 4 Side Panels ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Side Panels - 1 0 5 1 . Undo the wire wraps in the top corners or the CRT. 2 . Lift the degauss cable out of the way to access the side panel screws.
Take Apart Side Panels - 1 0 6 3 . On the rear of the side panels, remove four screws. These screws connect the side panels to the divider panel (the metal chassis).
Take Apart Side Panels - 1 0 7 4 . At the top rear of the side panels, pull each side panel off the plastic pin. (The left and right side panels are identified when viewing the computer from the rear.) Note: To separate the left panel from the right panel, remove the rear bracket.
Take Apart Side Panels - 1 0 8 5 . Pull the panels out to the sides a bit, and then lift the side panels up and off the computer..
Take Apart Side Panels - 1 0 9 6 . Carefully remove the antenna wire from each side panel. 7 . Pull the side panel off the metal divider panel. If necessary, repeat these steps for the other side panel.
Take Apart Antenna - 1 1 0 Antenna ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Antenna - 1 1 1 • bottom housing • front outer bezel • top rear housing • divider panel assembly.
Take Apart Antenna - 1 1 2 1 . Remove the three screws and cable clip on the antenna..
Take Apart Antenna - 1 1 3 2. Important: Note how the antenna wire is routed through the side panel before removing. A close-up view of the right panel antenna is shown here.
Take Apart Antenna - 1 1 4 3 . Carefully remove the antenna from the left side panel..
Take Apart Antenna - 1 1 5 4 . Before removing the antenna from the divider panel, mark the hole (with a pen tip) that the antenna passes through so you know which hole the antenna goes into when replacing the antenna. 5 . Lift the antenna board from the divider panel.
Take Apart Speakers - 1 1 6 Speakers Before you begin, rest the computer on an ESD mat or other soft surface, and remove the bottom housing. The EMI coveris removed in this photo, but it is not necessary to remove it to access the speakers. Note: Service parts package speakers as a kit.
Take Apart Speakers - 1 1 7 1 . Disconnect the short speaker cable next to the speaker. 2. Note: If you are certain a speaker is faulty, the easiest removal method is to gently push the speaker down in the direction of the arrow. This will bend the biggest tab (there are three tabs) that connects the speaker to the divider panel.
Take Apart Headphone Board - 1 1 8 Headphone Board ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Headphone Board - 1 1 9 1 . Turn the divider panel over. 2 . Remove the speaker to access the headphone/ audio board screw. 3. Using a stubby (short) screwdriver, remove the screw. 4 . Disconnect the connector from the heaphone board. 5 . Remove the headphone board from the divider panel.
Take Apart Power/LED Board - 1 2 0 P ower/LED Board ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Power/LED Board - 1 2 1 1 . Turn the divider panel over and remove the speaker to access the power/LED board screw. 2 . Using a stubby screwdriver, remove the screw. 3 . Disconnect the cable from the connector. 4 . Remove the power/LED board from the divider panel.
Take Apart CRT - 1 2 2 CR T ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart CRT - 1 2 3 1 . Remove the four CRT screws and the ground wire. 2 . Lift the CRT from the inner bezel. Caution: Be careful when working around the CRT neck rings. If the neck rings are bumped, the CRT will be knocked out of adjustment, and will require replacement of the CRT.
Take Apart Microphone - 1 2 4 Micr ophone ± W arning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Microphone - 1 2 5 1 . Disconnect the microphone connector. If you can’t access the micropone connector, unwrap the bendable degauss cable wrap.
Take Apart Microphone - 1 2 6 Replacing the Microphone 1 . Insert the microphone into the inner bezel with the loop facing down, toward the CRT. 2 . Push the microphone through the hole on the inner bezel (see photo on the next page).
Take Apart Microphone - 1 2 7 3 . Check that the microphone protrudes through the inner bezel hole..
Adjustments LED Alignment Procedure - 5 5 7 . Replace the bottom housing, making sure to align the tabs on the front. 8 . If the button continues to stick after the LED has been properly aligned, you may have to lightly sand the inner bezel. Sand the area surrounding the inner button to reduce the contact between the inner button and inner bezel.
Adjustments LED Alignment Procedure - 5 6 Inner Bezel Sanding 1 . Remove the inner power button so that the LED is exposed, as shown in the graphic. 2. Using a 180 grit or higher (Silicon Carbide) wet/dry sandpaper, lightly sand the edge of the lower section of the button recess (indicated by the red arrows).
Adjustments LED Alignment Procedure - 5 7 slight uniform radius around the entire edge of the button recess. 3 . Clean out the inner button recess making sure to remove any debris that may have deposited during the sanding process. 4. Reinstall the inner button and spring.
Adjustments LED Alignment Procedure - 5 8 adjustment part number 011-0206, “Power Button/LED Alignment” into the appropriate section in AppleOrder.
Service Source K Upgrades iMac, iMac D V , iMac D V Special Edition.
Upgrades - 1 Memory The iMac comes with a minimum of 64 MB of SDRAM and can be expanded to a maximum of 512 MB. Install a memory module that meets the following specifications: • JEDEC PC-100 DIMM • 64, 128, or 256 MB • 168-pin Note: Memory used in this computer is not the same as that used in previous iMac computers.
Upgrades - 2 Note: Place a soft towel or cloth on the desk or surface. Position the screen face down on the cloth. 1 . Using a flatblade screwdriver or a coin, turn the latch counterclockwise to open the rear access door.
Upgrades - 3 3 . Touch the EMI cover that is visible inside the recessed latch area before touching any components on the main logic board. This protects the computer from damage caused by electostatic discharge . Important: If necessary, remove any existing memory module.
Upgrades - 4 4 . Push the ejector tabs on the slots outward and down so they are in the open position..
Upgrades - 5 5 . Align the notches on the memory module with the small notches inside the slot. 6 . Push down on the DIMM until it snaps into place. The ejectors will automatically close. 7 . Close the rear access door and test the computer before returning it to the customer.
Upgrades - 6 Option–S when restarting the computer. This preserves the Setup Assistant experience (a movie and setup instructions) for the customer. If these keys are not held down when restarting the computer after an upgrade, the Setup Assistant file will execute for the dealer, disable itself, and the customer will never see it.
Upgrades - 7 AirPort Card Place a soft towel or cloth on the desk or surface. 1 . Position the screen face down on the cloth.Use a coin or flatblade screwdriver to turn the latch counterclockwise on the access door.
Upgrades - 8 3 . Touch the metal EMI shield inside the recessed latch area before touching any components on the main logic board..
Upgrades - 9 4 . Detach the antenna from the left guide rail. 5 . Remove the protective antenna cap from the end of the antenna and store the cap in a safe place.
Upgrades - 10 6 . Slide the AirPort Card into the adapter card. Note: It is probably easiest to attach the metal ground clip over the AirPort Card once the card is installed into the Adapter Card.
Upgrades - 11 7 . Connect the antenna by plugging the antenna wire into the small hole in the end of the AirPort Card..
Upgrades - 12 8 . Align the edges of the AirPort Card with the guides on the AirPort Card slot. Insert the AirPort Card into the adapter Card connector.
Upgrades - 13 movie and setup instructions) for the customer. If these keys are not held down when restarting the computer after an upgrade, the Setup Assistant file will execute for the dealer, disable itself, and the customer will never see it.
Upgrades - 14 Connect an External Monitor If the iMac has a VGA output port, you can connect an external monitor to the computer and mirror, or show, what’s on the computer display to a larger audience. Note: You can’t use this port to connect a second monitor to extend the desktop.
Upgrades - 15 1 0 . Place the computer face down, on a soft, clean cloth or ESD mat..
Upgrades - 16 f the VGA port is covered (you can’t see it), replace the vented cover with the VGA vented cover that came with the computer.I V ented Cover VGA V ented Cover.
Upgrades - 17 1 1 . Insert the flatblade screwdriver partially into the slot on the top of the vented cover, then gently push forward on the screwdriver to pry the cover off.
Upgrades - 18 1 2 . Insert the lower edge of the VGA vented cover into the slots, then press the top edge down to snap the cover in place. VGA V ented Cover T abs Slots.
Upgrades - 19 1 3 . Plug the external monitor cable into the VGA output port on the back of the computer. 1 4 . Plug the monitor cable into the monitor port on the external monitor. 1 5 . Plug the power cord in and press the Power button on the computer to turn it on.
Service Source K Exploded V ie w iMac, iMac D V , iMac D V Special Edition.
Exploded View 1 iMac, iMac D V , iMac Special Edition Exploded V iew Click part to go to parts database (only in html version). Power/Analog/Video Board 661-2212 661-2315, Rev .2 AirPort Adapter Card 076-0804 Speakers Left & Right Kit 076-0808 Logic Board 661-2210 350 MHz 661-2317 350 MHz, V er .
Exploded View 2 Color ed Service P arts Click part to go to parts database (only in html version). Keyboard 922-4077 Graphite 922-4078 Blueberry 922-4079 T angerine 922-4080 Grape 922-4081 Strawberry .
Exploded View 3 Cable Locator Click part to go to parts database (only in html version). Cable , Modem, Phone 1TP , ICE 922-3963 Cable , Audio (Headphones, Speakers , Microphone, LED , P ower Supply) 922-4039 RGB Cable 922-4034 Cable .
Exploded View 4 Scr ew Matrix Screws Locator 922-4144 (4), CD/HD Carrier to Divider Panel 922-4145 (4), CD/DVD Carrier CD to Drive to Carrier 922-4146 CD Adapter Board (2) 922-4147 HD to HD Carrier (4.
Exploded View 5 Identifying 350 MHz Logic Boards There are currently three 350 MHz logic boards in service stock for the slot-loading iMac. Two of the logic boards are under the same part number, 661-2210 (refer to TIL article 58564 or the Service Parts database for additional information).
Exploded View 6 Identifying the 400 MHz Logic Boards There is a new version of the 400 MHz logic board for the iMac DV and iMac Special Edition. The easiest way to identify the boards is by the daughterboard. The Version 2 logic board (661-2316) does not have a daughterboard.
Exploded View 7 Identifying the Po wer/Analog/V ideo Boards There is a new revision (backward compatible) of the power/analog/video board (661- 2315, Rev. 2) for the slot-load iMac. The revised board can be identified by the presence of a switch at location SW901 (see below).
An important point after buying a device Apple IMAC DV, (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Apple IMAC DV, yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Apple IMAC DV, - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Apple IMAC DV, you will learn all the available features of the product, as well as information on its operation. The information that you get Apple IMAC DV, will certainly help you make a decision on the purchase.
If you already are a holder of Apple IMAC DV,, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Apple IMAC DV,.
However, one of the most important roles played by the user manual is to help in solving problems with Apple IMAC DV,. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Apple IMAC DV, along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
