Instruction/ maintenance manual of the product 4320T HP (Hewlett-Packard)
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HP 4320t Mobile Thin Client Maintenance and Service Guide SUMMARY This guide is a troublesh ooting reference us ed for maintaining an d servicing the comput er.
© Copyright 2010 Hew lett-Packard Development Company, L.P. Intel and Arrandale are trademarks of Intel Corporation in the U.S. an d other countries. Windows is a U.S. registered trademark of Microsoft Corporation. SD Logo is a trademark of its proprietor.
Safety warning notice WARNING! To reduce the possibility of heat-related inju ries or of ove rheating th e computer, do not place the compu ter directly on your lap or o bstruct the computer ai r vents.
iv Safety warning no tice.
Table of contents 1 Product description ............ ......... ........... ........... ........ ............ ........... ........ ............ ......... . ................ ......... ....... 1 2 External component id enti fication ...... ........... ..
Grounding guidelines ................ ......... ............ ........... ......... ............ ........... .......... ........... .... 31 Electrostatic dis charge damage ................. ........................... ...................... ...... 31 Packaging and transporting guidelines .
DVD-ROM drive specifications ................ ......... ............ ............ .......... ............ ............ ........ ....... ......... 88 System resource specifications ......... .......... ............ .......... ............ ......... ...
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1 Product description Category Description Product Name HP 4320t Mobile Thin Client, UMA Processors Intel® Arrandale™ P4500, 1.8-GH z, 3-MB L3 cache (3 5 W) Chipsets Intel® HM57 Express Graphics I.
Category Description Diskette drive Supports external USB diskette drive only Audio/ Visual HD audio - IDT 92HD80 Integrated microphone Two stereo speakers Headphone/microphone ja cks Modem High-speed.
Category Description Power requirements 65-W Smart AC Adapter with localized cable plug support (3-wire plug with ground pin) 9-cell, 93-Wh Li-ion ba ttery 6-cell, 47-Wh Li-ion ba ttery Security Suppo.
2 External component identification Top components TouchPad Component Description (1) TouchPad off indicator To turn the TouchPad zone on and off, quickly double-tap the TouchPad off indicator. NOTE: When the TouchPad zone is active, the light is off.
Lights Component Description (1) TouchPad off indicator ● Amber: The TouchPad is off. ● Off: The TouchPad is on. (2) Caps lock light On: Caps lock is on. (3) Power light ● On: The computer is on. ● Blinking: The computer is in the Slee p state.
Buttons, speakers, and switches NOTE: Your computer may look sligh tly different from the illustrati on in this section. Component Description (1) Speakers (2) Produce sound. (2) Internal display switch Turns off the display if the display is closed while the power is on.
Keys Component Description (1) esc key Displays system information when pressed in combination with the fn key. (2) fn key Executes frequently use d system functions when pressed in combination with a function key or the esc key. (3) Windows logo key Displays the Windows Sta rt menu.
Front components Component Description (1) Drive light ● Blinking white: The solid-state module or optical drive is being accessed. ● Amber: HP 3D DriveGuard has temporarily parked the solid- state module.
Right-side components Component Description (1) USB 2.0 ports (2) Connect optional USB devices. (2) RJ-11 (modem) jack Connects a modem cable . (3) Optical drive light (select models only) Blin king: The optical drive is being a ccessed. (4) Optical drive eject button (select models only) Press to eject the optical disc.
Left-side components Component Description (1) Security cable slot Attaches an opti onal security cable to the computer. NOTE: The security cable is desi gned to act as a d eterrent, but it may not prevent the computer from being mishandled or stolen.
Bottom components Component Description (1) Battery release latches (2) Release the battery from the batter y bay. (2) Battery bay Holds the battery. Bottom components 1 1.
Display NOTE: Your computer may look sligh tly different from the illustrati on in this section. Component Description (1) Internal display switch Turns off the display if the display is closed while the power is on. (2) Internal microphone Records sound.
Wireless antennas (select models only) The antennas send and receive signals from o ne or more wireless devices. These anten nas are not visible from the outside of the computer. Component Description WLAN antennas (2)* Send and receive wirele ss signals to communicate with wireless local area networks (WLANs).
Additional hardware components Component Description (1) Power cord* Connects an AC adapter to an AC outlet. (2) Battery* Powers the computer when the computer is not plugged into an external power source. (3) AC adapter Converts AC power to DC power.
3 Illustrated parts catalog Service tag When ordering pa rts or requestin g information, pr ovide the comput er serial number an d model description provided on the servi ce tag. Component Description (1) Product name The product name affixed to the front of your computer.
Computer major components Item Description Spare part number (1) 33.8-cm (13.3-in) high-definition (136 6x768 resolution) display assembly (see Display assembly components on page 20 for m ore information on display assembly spar e parts).
Item Description Spare part number ● For use in Belgium 599572-A41 ● For use in Brazil 599572-201 ● For use in Bulgaria 599572-261 ● For use in Canada (French) 599572-121 ● For use in Denmar.
Item Description Spare part number (9) Fan 599544-001 (10) Processor heat sink 599546-001 (11) Memory module (PC3-10600, 1333-MHz, DDR3, shared) 2048-MB 598856-002 1024-MB 598859-002 (12) Modem module NOTE: The modem module spare part kit does not include a modem module cable.
Item Description Spare part number For use in Afghanistan, Albania, Algeria, An dorr a, Angola, Argentina, Armenia, Australia, Austria, Azerbaijan, Bahrain, Belarus, Belgiu m, Benin, Bermuda, Bhutan, .
Display assembly components Item Description Spare part number Display assembly: 599553-001 (1) Display bezel 599532-001 (2) Display panel (available separately in APJ, using part number 623175-001) (.
Plastics Kit Item Description Spare part number Plastics Kit : 599563-001 (1) ExpressCard slot bezel (2) DVD-ROM drive blank ( used with no-ODD option) RJ-11 (modem) connector bla nk (not illustrated,.
Cable Kit Item Description Spare part number Cable Kit : 599525-001 (1) Power connector and cable (2) RJ-11 (modem) jack and cable 22 Chapter 3 Illustrated parts catalo g.
Mass storage devices Item Description Spare part number (1) Solid-state module (includes bracket) 2-GB 614527-001 4-GB 614528-001 8-GB 634653-001 (2) DVD-ROM drive (includes bezel) 599539-001 Mass sto.
Miscellaneous parts Description Spare part num ber AC adapt ers 65-W, 3-pin Smart AC adapter ● For use in all countries and re g ions except India 609939-001 ● For use in India 609948-001 Power cords (AC power, 3-pin, black, 1.
Sequential part number listing Spare part number Description 490371-001 Power cord (AC power, 3-pin, black, 1.83 m), for use in North America 490371-011 Power cord (AC power, 3-pin, black, 1.83 m), for use in Austria 490371-021 Power cord (AC power, 3-pin, black, 1.
Spare part number Description 582564-001 Broadcom 43224 802.11a/b/g/n 2x2 WiFi Adapter, for u se in Antigua and Barbuda, Aruba, Bahamas, Barbados, Belize, Canada, Guam, Guinea, Haiti, Ja maic a, Nether Antilles, Puerto Rico, St. Kitts and Nevis, St. Lucia, St.
Spare part number Description 599565-001 Screw Kit 599566-001 Speaker assembly 599567-001 Switch cover 599569-001 Top cover 599572-001 Keyboard, for use in the United States 599572-031 Keyboard, for u.
Spare part number Description 609939-001 65-W, 3-pin Smart AC adapter for use in all coun tries and regions except India 609948-001 65-W, 3-pin Smart AC adapter for use in India 611699-001 Processor (Intel® Arrandale™ P4500 1.
4 Removal and replacement procedures Preliminary replacement requirements Tools required You will need the following tools to comple te the removal and re placement procedures: ● Flat-bla ded screw .
Cables and connectors CAUTION: When servicing the computer, be sure that c abl es are placed in their prop er locations during the reassembly p rocess. Improp er cable placem ent can damage the co mputer. Cables must be handle d with extreme care to avo id damage.
Grounding guidelines Electrostatic discharge damage Electronic componen ts are sensit ive to electrostatic d ischarge (ESD). Circu itry design and struc ture determine the deg ree of sensitiv ity.
Packaging and transporting guidelines Follow these groun ding guidelines whe n packaging and transp orting equipment: ● To avoid hand contact, transport products in static-safe tubes, bags, or boxes. ● Protect ESD-sensitive parts an d assemblies wi th conductive or approv ed containe rs or packaging.
Equipment guidelines Grounding equi pment must include eith er a wrist stra p or a foot strap at a grou nded workstation. ● When seated, wear a wrist strap connected to a grounded syste m. Wrist straps are flexibl e straps with a minimu m of one megohm ±1 0% resi stance in the ground co rds.
Component replacement procedures This section provides re moval and replacement procedures. There are as many as 8 3 screws, in 8 different sizes, that mu st be re moved, replac ed, or loosene d when servicing the computer. Make specia l note of each screw size an d location during remova l and replacement.
Computer feet Description Spare part num ber Rubber Kit (include s computer feet) 599564-001 The computer feet a re adhesive -backed rubber pads . The feet are in cluded in the Rubber Kit, spare part number 599 564-001. The re are 4 ru bber feet that atta ch to the base enclosure in the locati ons illustrated below.
Battery Description Spare part num ber Battery 9-cell, 93-Wh (2.8-Ah) Li-ion 593573-001 6-cell, 47-Wh (2.2-Ah) Li-ion 593572-001 Before disa ssembling the co mputer, follow these ste ps: 1. Shut down the computer. 2. Disconnect all ext ernal devices connected to the computer.
Switch cover Description Spare part number Switch cover 599567-001 Before removing the switch cover, follow these steps: 1. Shut down the computer. 2. Disconnect all ext ernal devices connected to the computer.
4. Slide the swit ch cove r back (1) , an d then remove it fro m the computer (2) . Reverse this procedure to insta ll the switch cover and ke yboard. 38 Chapter 4 Remova l and replacement procedures.
Keyboard Description Spare part nu mber Keyboard (includes keyboard cable) 599572- xxx NOTE: For a detailed list of keyboards see the parts list in Computer major components o n page 16 Before removing the keyboard, fo llow these steps: 1. Shut down the computer.
2. Slide the keyboard ba ck toward the displa y (1) , and t hen ro tate it r ight (2) until it rests upside down on the right sid e of the compu ter. 3. Release the zero inserti on force (ZIF) conne ctor (1) to which the keyboard cabl e is attached, an d disconnect the keyboard cable (2) from the system board.
Memory module Description Spare part num ber Memory module (PC3-10600, 1333-MHz, DDR3, shared) 2048-MB 598856-002 1024-MB 598859-002 Before removing the memory module, follo w these step s: 1. Shut down the computer. 2. Disconnect all ext ernal devices connected to the computer.
3. Remove the memory module (2) by pul ling the module a way from the slot at an angle. NOTE: Memory modules a re designed with a notch (3) to prevent incorrect insertion into the memory module sl ot. Reverse this procedure to in stall a memory module.
DVD-ROM drive Description Spare part num ber DVD-ROM d rive 599539-001 Before r emoving th e DVD-R OM drive, follow these steps: 1. Shut down the computer.
5. If it is necessary to replace the DVD-ROM drive bracket , positi on the DVD-ROM drive with the rear toward you. 6. Remove the two PM2.0×3.0 screws (1) that secure the DVD-R OM drive bracket to th e DVD- ROM drive. 7. Remove the DVD -ROM drive brac ket (2) .
Power button board Description Spare part num ber Power button board with cable 599517-001 Before removing the power button bo ard, follow thes e steps: 1.
Speakers Description Spare part num ber Speaker assembly 599566-001 Before removing the speakers, follow th ese steps: 1. Shut down the computer. 2. Disconnect all ext ernal devices connected to the computer.
7. Slide the right spea ker back and out fro m the tab (5) that hold s it at th e right, then lift t he right speaker (6) up and out at an angle. Reverse this procedure to insta ll the speakers.
Palm rest Description Spare part num ber Palm rest (includes TouchPad) 599551-001 Before removing the palm rest, fol low these steps: 1. Shut down the computer.
5. Remove the palm rest (3) . Reverse this procedure to insta ll the palm rest. Component replacement procedures 49.
Solid-state module NOTE: The solid-state module spare part kit includes a solid-state module bracket. Description Spare part num ber 2-GB 614527-001 4-GB 614528-001 8-GB 634653-001 Before removing the solid-state module, foll ow these steps: 1. Shut down the computer.
4. Remove the solid-stat e module (4) from th e solid-sta te module b ay. 5. If it is necessary to replace the solid-stat e module bracket, remo ve the PM3.0×3.5 screws (1) from each side of the solid-state module . 6. Lift the bracket (2) straight up to remove it from the s olid-state module.
RTC battery Description Spare part num ber RTC battery 599516-001 Before r emoving th e RTC bat tery, foll ow these steps: 1. Shut down the computer. 2.
Reverse this procedure to in stall the RTC battery. Component replacement procedures 53.
WLAN module Description Spare part num ber Broadcom 4312G 802.11b/g WiFi Adapter For use in Barbados, Belize, Canada, the Ca yman Islands, Guam, Puerto Rico, the U nited States, and the U.
CAUTION: To preven t an unresponsive system, replace the wireless module only wit h a wireless module authorized fo r use in the computer by the governmental agency that regulates wirele ss devices in your country o r region.
4. Remove the WLAN module (3) by pulling the module away from the slot at an angle. NOTE: WLAN module s are designed with a no tch (4) to prevent incorrect insertion.
Heat sink and fan NOTE: The heat sink spare part kit includes replacement thermal material. Description Spare part num ber Fan 599544-001 Processor heat sink 599546-001 Before removing the heat sink, follow the se steps: 1. Shut down the computer. 2. Disconnect all ext ernal devices connected to the computer.
4. Lift the right edge of the heat shield to disengage t he tabs on t he left s ide of th e heat sh ield from the top co ver, and then remo ve the heat shield (3) . 5. Disconnect the fan cable from the system board (1) . 6. Loosen the 2.0×5.0 ca ptive screw (2) from the system board, and then remove the fan (3) .
7. Following the sequ ence stamped in to the heat si nk, lo osen the four PM2.5×10.0 captive screws (1) that secure the h eat sink to the proce ssor. 8. Lift the heat sink off the processor (2) , and then lift the heat sink up and to the right to remove the heat sink fr om the base enclosur e (3) .
Processor NOTE: The processor spare part kit includes re placement thermal material. Description Spare part num ber Processor , Intel Arrandale P4500 1.8-GHz, (includes replacement thermal material) 611699-001 Before removing the processor, follow these step s: 1.
3. Lift the processor (2) straight up and remove it. NOTE: When you install the pro cessor, the gold triangle (3) on the processor must be aligned with the triangle (4 ) embossed on the processor socket. Reverse this procedure to insta ll the processor.
Display assembly NOTE: The display assembly spare part kit in cludes 2 WLAN antenn as and cable s. Description Spare part number Display assembly, 33.8-cm (1 3.
3. Lift the display assembly (4) straight up and remove i t from the base enclo sure. 4. If it is necessary to replace the display bezel, display enclosure, or disp lay hinges, remove the four Mylar screw covers (1) and the four slotted T 8 M2.5×5.0 screws (2) that secure the display bezel to the dis play assembly.
c. Flex the inside edge of the left side an d the ri ght side of the beze l until it disengages from the display back cover (3) . d. Remove the display bezel from the display back cover (4) . 6. If it is necessary to replac e the displa y hinges, remove the six T8 2.
8. Peel back the tape (1) that secures the displa y cable to the displa y panel, and then release the ZIF connector (2) . Remove th e cable from th e display panel con nector (3) . NOTE: The display ca ble includes th e microphone. 9. Remove the display panel.
11. Gently release the integrated microp hone (1) from the clips at the top of the display back cover, remove the displa y cable from the clips and rou ting channel s (2) along the bottom of t he display back cover, and then remove the display cable (3) .
Top cover Description Spare part num ber Top cover 599569-00 1 Before removing the top cover, follow these steps: 1. Shut down the computer. 2. Disconnect all ext ernal devices connected to the computer.
4. Release the top co ver from the side s of the base enclosure , and gent ly use a flat-bladed screwdriver to pry lo ose the top cover alo ng the front edg e (2) .
Modem module Description Spare part num ber Modem module NOTE: The modem module spare part kit does not include a modem module cable. The modem module cable is included in the Cable Kit. See Cable Kit on p age 22 for more Cable Kit spare part information.
5. Remove the modem module. Reverse this procedure to in stall the modem module. 70 Chapter 4 Remova l and replacement procedures.
System board NOTE: The system board spare part kit includes replacemen t thermal material. Description Spare part num ber System board (includes replacement thermal material) 614524-001 Before removing the system board, follow these steps: 1. Shut down the computer.
5. Use the optical drive connector (4) to lift the right side (5) of the system board. 6. Remove the system board (6) at an angle. Reverse this procedure to insta ll the system board.
USB connector board Description Spare part number USB board with ca ble 599524-001 Before r emoving the USB co nnecto r assembly, follow these steps: 1.
3. Remove the USB connector asse mbly (2) from the base enclosure. Reverse this procedure to insta ll the USB connector assem bly. 74 Chapter 4 Remova l and replacement procedures.
Modem module cable NOTE: The modem module cable with RJ-11 connector is includ ed in the Cable Kit on page 22 , part number 599525-0 01. Before removing the modem module cable, follow these steps: 1. Shut down the computer. 2. Disconnect all ext ernal devices connected to the computer.
3. Remove the modem cable (2 ) from the routing channel in the b ase enclosure. 4. Remove the modem cabl e. Reverse this procedure to in stall the modem cable .
Power connector cable NOTE: The power connector cable (DC power) is included in the Cable Kit on p age 22 , part number 599525-001. Before removing the power connecto r cable, follow thes e steps: 1. Shut down the computer. 2. Disconnect all ext ernal devices connected to the computer.
2. Disconnect the power connector cab le from the base enclosure (1) , and then remove the cab le from the routing cha nnel (2) in the base enclosure. 3.
5 Computer Setup Starting Computer Setup Computer Setup is a preinstalled, ROM-based utility that can be used even when the operating system is not working or will not load. NOTE: Some of the Computer Setu p menu items listed in this guide ma y not be supp orted by your computer.
Using Computer Setup Navigating and selectin g in Computer Setup The information and setti ngs in Computer Setu p are accessed from the File, Se curity, Diagnostics, and System Configuration men us. To navigate and select in C omputer Setup, f ollow these steps: 1.
4. Follow the on-screen instructions. 5. To save your change s and exit, click the Save icon in th e lower-left corner of the screen, and then follow the on-scre en instructions. Your changes go into effect when the compu ter restarts. NOTE: Your password settings and se curity setting s are not changed when you restore the factory settings .
Computer Setup menus The menu tables in this sect ion provide an over view of Computer Setup options. NOTE: Some of the Computer Se tup menu items list ed in this chapter may no t be supp orted by your computer. File menu Select To do this System Information ● View identification information for the computer and the batteries in the system.
Select To do this Boot Options ● Set a Startup Menu delay (in seconds) . ● Set the Express Boot Popup delay in second s. ● Enable/disable CD-ROM boot (enabled by default) . ● Enable/disable PXE Internal NIC boot (disabled by default). ● Set the boot order.
Select To do this Built-In Device Options ● Enable/disable the wireless button state (enabled b y default). ● Enable/disable the embedded WLAN device ( enabled by default). ● Enable/disable LAN/WLAN switching (disabled by default). ● Enable/disable the Networ k Interface Controller (LAN) (enabled by default).
6 Specifications Computer specifications Dimensions Depth 22.81 cm (8.98 in) Width 32.2 cm (12.68 in) Height (front to rear) 27.5 to 35.5 cm (1.08 to 1.40 in) Weight ● With 6-cell battery, one memory module, and optical disk drive < 2.07 kg (4.58 lbs) ● With 6-cell battery, one memory m odule; without optical disk drive < 1.
Operating 0.75 g zero-to-peak, 10 Hz to 500 Hz, 0.25 oct/min sweep rate Nonoperating 1.50 g zero-to-peak, 10 Hz to 500 Hz, 0.5 o ct/ min sweep rate NOTE: Applicable product safety standards specify thermal limits for plastic surfaces. The computer opera tes well within this range of temperatures.
Solid-state module specifications 2-GB* 4-GB* 8-GB* Dimensions Height 9.5 mm 9.5 mm 9.5 mm Width 70 mm 70 mm 70 mm Weight 15 g 15 g 15 g Interface typ e SATA II SATA II SATA II Transfer rate Sustained.
DVD-ROM drive specifications Applicable disc DVD-ROM (DVD-5, DVD-9, DVD-10, DVD-18, CD- ROM (Mode 1 and 2), CD Digital Audio, CD-XA ready (Mode 2, Form 1 and For m 2), CD-I (Mode 2, Form 1 and Form 2).
System resource specifications You can use Device Manager to ge t a graphical view of the system resources that control how the devices work on the computer. Sy stem resources that are accessible from Device Manager are direct memory access (DMA) channels, i nput/output (I/O) ports, interru pt request (IRQ) lines, a nd memory addresses.
7 Power cord set requirements The wide range input fe ature of the co mputer permits it to ope rate from any line voltag e from 100 to 120 volts AC or from 220 to 240 volts AC. The 3-conductor powe r cord set included wi th t he computer meets the requirem ents for use in the country or region where the e quipment is purchased .
Requirements for specific countries and regions Country/region Accredited a gency Applicable note nu mber Australia EANSW 1 Austria OVE 1 Belgium CEBC 1 Canada CSA 2 Denmark DEMKO 1 Finland FIMKO 1 Fr.
8 Recycling Battery When a battery has reached the end of its useful life, d o not dispose of the battery in genera l household waste. Follo w the local laws a nd regulati ons in your area for computer b attery disposal. Display WARNING! The backlight contains mercury.
Perform the following ste ps to di sassemble the display assembly: 1. Remove all screw covers (1) and screws (2 ) that secure the display bezel to the display assembly. 2. Lift up and out o n the left and ri ght inside edges (1) and the top an d bottom inside edge s (2) of the display beze l until the bezel disengag es from the display assembly.
4. Disconnect all disp lay panel cables (1) from the display i nverter and remove the in verter (2) . 5. Remove all screws (1) that secure the display panel a ssembly to the display enclosure. 6. Remove the display panel assembly (2) from the display enclosure.
10. Remove the display pan el frame (2) from the display panel. 11. Remove the screws (1) that secure the backlight cover to the display panel. 12. Lift the top edge of the backlig ht cover (2) and swing it outward. 13. Remove the backlight cover. 14.
15. Remove the backlight cables (1) from the clip (2) in the display pa nel. 16. Turn th e display panel upside -down. WARNING ! The backlight contains mercury. Exercise caution when removing an d handling the backlight to avoid damag ing this compon ent a nd causing exposu re to the mercury.
18. Remove the backlight from the backlight frame. 19. Disconnec t the display pane l cable (1) from the LCD panel. 20. Remove the screws (2) that secure the LCD panel to the display rea r panel. 21. Release the LCD panel (3) from the d isplay rear panel.
Index A AC adapter identifying 14 spare part numbers 24 antenna, disconnecting 55 antennas WLAN 13 applications key, Windo ws 7 audio, product description 2 audio-in (microphone) jack identifying 8 au.
Ethernet, product description 2 Execution Disable 83 ExpressCard slot bezel, illustrated 21 ExpressCard slot, identifying 10 external media cards, prod uct description 2 external monitor port identify.
Ethernet 2 external media ca rds 2 graphics 1 keyboard 2 memory module 1 modem module 2 operating system 3 optical drives 1 panels 1 pointing devices 2 ports 2 power requirements 3 processors 1 produc.
An important point after buying a device HP (Hewlett-Packard) 4320T (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought HP (Hewlett-Packard) 4320T 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 HP (Hewlett-Packard) 4320T - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, HP (Hewlett-Packard) 4320T you will learn all the available features of the product, as well as information on its operation. The information that you get HP (Hewlett-Packard) 4320T will certainly help you make a decision on the purchase.
If you already are a holder of HP (Hewlett-Packard) 4320T, 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 HP (Hewlett-Packard) 4320T.
However, one of the most important roles played by the user manual is to help in solving problems with HP (Hewlett-Packard) 4320T. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device HP (Hewlett-Packard) 4320T 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
