Instruction/ maintenance manual of the product 5L (C3941A) HP (Hewlett-Packard)
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Service Manual HP LaserJet 5L (C3941A).
© Copyright He wlett-Packard Company 1995 All Rights Reserv ed. Reproduction, adaptation, or translation without p rior written permission is prohibited, except as allo wed under the copyright la ws.
Con ventions This manual uses the following con ventions: Color is used to emphasize items which are important to the material under discussion. The names of major printer parts and assemblies are CAPIT ALIZED. Bold is used for emphasis, particularly in situations where italic type would be confusing.
Chapter Descriptions 1 Product Inf ormation Orientation to the printer , as well as the service and repair philosophy , is discussed. Information on obtaining assistance and warranty is also here. 2 Site Requirements Here are recommendations pertaining to installation requirements.
List of Figur es Figure 1-1 HP LaserJet 5L Model and Serial Numbers . . . . . . . . . . . 1-4 Figure 1-2 Front/Side V ie ws of the Printer . . . . . . . . . . . . . . . . . . 1-6 Figure 1-3 Front Door Assemblies . . . . . . . . . . . . . . . . . . . .
Figure 6-23 Pickup Roller Assembly Remov al (1 of 2) . . . . . . . . . . . 6-27 Figure 6-24 Pickup Roller Assembly Remov al (2 of 2) . . . . . . . . . . . 6-28 Figure 6-25 Paper Pickup Roller Assembly Replacement (Inside/Front V ie w) 6-29 Figure 6-26 Paper Feed Frame Remo v al .
List of T ables T able 1-1 Printer Features . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 T able 1-2 Paper Capacities and Sizes . . . . . . . . . . . . . . . . . . . . 1-3 T able 1-3 Performance Specifications . . . . . . . . . . . . . . . .
viii.
1 Pr oduct Inf ormation Contents Printer Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Paper Capacities and Sizes . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Identification . . . . . . . . . . . . . . . . . .
1-2 Product Information.
Printer F eatur es Paper Capacities and Sizes Features HP LaserJet 5L (C3941A) Print Speed 4 ppm T ext & Gr aphics Resolution 300 or 600 dpi Printer Language Enhanced PCL 5 Monthly Usage (pages) 4.
Identif ication Model and Serial The model number and serial numbers are listed on identification labels located on the bottom of the printer . The model number is alphanumeric, such as C3941A for the HP LaserJet 5L printer .
Specif ications Category Specification Print Speed* 4 ppm Monthly Usage (Duty Cy cle) 4,000 pages Lif e Expectancy of T oner Car tridge (pages)** 2,500 pages @ 5% cov erage First Print A4 <23 sec onds Letter <23 seconds * Actual s peed depends on data complexity and software handling efficiency.
Pr oduct Over view Front/Side Views of the Printer 1. P aper Input Suppor t 7. Front P anel Button 13. Front Output S lot (face-up) 2. P aper Output Suppor t 8. P aper Output Bin 3. P aper Guides 9. P aper P ath Lev er 4. Error (top) Light 10. Serial and Model Number (under printer) 5.
Front Door Assemblies 14. P aper Release Le ver 16. T ransf er Rol ler 15. T oner Car tridge Compar tment 17. EP Door Figure 1-3 Product Information 1-7.
Back View of the Printer 18. P ower Cab le Connector 20. Memor y Expansion Cov er 19. P arallel Cab le Connector Figure 1-4 I 1-8 Product Information.
Service A ppr oach Repair of the printer normally begins with the use of the printer’ s internal diagnostics in conjunction with the troubleshooting procedures in Chapter 7. Once a faulty part is located, repair is generally accomplished by assembly le v el replacement of Field Replaceable Units (FR Us).
Print Utilities HP provides se veral utilities for enhancing use of the LaserJet printers in MS-DOS and W indows en vironments. More information on specific utilities is included with each of the dri v ers listed in T able 1-6.
T echnical Assistance HP ASAP HP ASAP (Automated Support Access Program) provides free user technical support information 24 hours a day , 7 days a week. The ASAP system includes HP A UDIO-TIPS and HP FIRST , both explained belo w . The ASAP service requires a touchtone phone.
Customer Inf ormation Centers (North America Only) For presales information, contact the nearest He wlett-Packard Customer Information Center , 1-800-752-0900 in North America.
W arranty This warranty gi v es you specif ic le gal rights. Y ou may also have other rights, which may va ry from area to area. He wlett-P ackard warrants the 5L LaserJet printer against defects in materials and workmanship for a period of one year from the date of purchase by the end user and is not transferable.
If you are using a mechanical switchbox, ensure that it is equipped with a surge protector . Damage to your printer could occur from the use of unprotected mechanical switchboxes. The warranty period begins either on the date of deli very or , where the purchase price includes installation by He wlett-P ackard, on the date of installation.
2 Site Requir ements Contents Site Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Operating En vironment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Printer Space Requirements . . . . . . . . . . . . . . .
2 -2 Site Requirements.
Site Requir ements Operating En vironment The en vironmental requirements listed in the table below must be maintained to ensure the proper operation of this printer . Consider the following points before installing the printer: • • Install in a well-ventilated, dust-free area.
Printer Space Requir ements Printer Space Requirements Figure 2-1 Description Dimension Width 13.2 in. (335.5 mm) Depth 12.3 in. (311.2 mm) Height (storage) (operational) 8.9 in. (227.5 mm) 14.6 in. (372.7 mm)* W eight (with toner car tridge) 15.9 lbs.
The HP C3906A T oner Cartridge T oner cartridges contain components that are sensiti ve to light, temperature, and humidity . Follo w the recommendations in this section to ensure the highest quality and longest life of HP toner cartridges. Keep the printer within the follo wing environmental conditions for optimum performance.
T oner Cartridge Handling Suggestions • • Before installing a cartridge, distribute the toner evenly by rotating the cartridge back and forth five to six times. (See Figure 2-2.) Repeat this action when toner begins to run low. Toner Cartridge Distribution • • Do not touch the surface of the photosensitive drum in the cartridge.
3 Installation and Conf iguration Contents Unpacking and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 Step 1: Choose the best location . . . . . . . . . . . . . . . . . . . . . . 3-3 Step 2: Unpack the printer . . . . . . . .
3-2 Installation and Configuration.
Unpacking and Installation Before unpacking the printer , inspect the shipping container for signs of physical damage. Since a damaged shipping box is an indication of improper handling during shipping, the printer may also be damaged.
Step 4: Install the toner cartridge 1 Open the EP Cartridge door . 2 Remov e toner cartridge from its box and cut it open. Sa ve the packing materials for possible cartridge storage. 3 Shake the cartridge vigorously to distrib ute the toner e venly inside the cartridge.
Note If your system does not meet these minimum requirements, only the PCL dri v er software will be installed. Minimum System Requirements • • 486 or above PC with 8 Mbytes DRAM (minimum) • •.
If you would like to connect another de vice to the LPT port you have conf igured to use with the HP LaserJet 5L, select the other device from the Microsoft W indows Control Panel and restart windo ws. The HP LaserJet printer is capable of receiving and processing both PCL commands and host-based generated data.
Host-Based Printing Status T o vie w your printer’ s status, open the HP LaserJet 5L Printer group within Program Manager and select Status W indow . As sho wn in Figure 3-2 belo w , the status window reports your printer’ s current status. In this case, the printer is Ready .
PCL Printer Settings T o change printer settings, select Contr ol P anel , Printers , HP LaserJet 5L (PCL) , Setup . The printer settings window will appear . (See Figure 3-3.) Select from the following options: • • Paper —Select Paper Size, Paper Source (manual feed), Copies, Orientation (portrait or landscape), and Set Custom Paper Size.
PCL Printing Status T o vie w your printer’ s status, open the HP LaserJet 5L PCL Printer group within Program Manager and select Status W indow . As sho wn in Figure 3-4 belo w , the status window reports your printer’ s current status. In this case, the printer is Ready .
Using the Contr ol Panel Control P anel Lay out The Control Panel consists of three status lights and a Front Panel Button located at the front of the printer .
LED Lights The LED lights provide a quick w ay to check the printer’ s status. When this Indicator: Looks like this: It means this: Do this: On Blinking Ready Ready to print. Print job in progress . Let job finish printing. On Form Feed There is unprinted data in the buff er.
When this indicator: Looks like this: It means this: Do this: Blinking Error (light b linking) P age T oo Comple x The page may be too c omplex for the printer’ s memor y capacity or the printer may not be ab le to create the image f ast enough to keep pac e with the engine printing process .
The Front P anel Button Depending on what state the printer is in, pressing the Front Panel Button allo ws you to control printing tasks by either starting or resuming a printer function. Use the Front Panel Button to accomplish the follo wing tasks: Function Action Lights Result W ake Up Briefly push and release the button.
Printing a Self-T est Page A self-test page can be useful in troubleshooting printer problems and determining which fonts hav e been do wnloaded to the printer . Self-test Page The self-test page includes an internal font listing showing all 26 pro vided fonts (1) and a listing of the current printer configuration (2).
Continuous Self T est A continuous self test can be useful for troubleshooting paper path and other problems. T o print a continuous self test: 1 Disconnect the printer from the power source. 2 Press and hold down the Front P anel Button while connecting power .
Printing an Engine T est The engine test print can be used to verify that the print engine is functioning correctly . The Formatter PCA is completely bypassed during an engine test. Consequently , this test is useful for isolating engine printer problems.
Resetting the Printer Resetting the printer accomplishes the following: • • Clears all data from the printer’s memory (including unprinted data, downloaded fonts, and macros). • • Stops any printing that is taking place and ejects the page. • • Removes some error conditions.
3-18 Installation and Configuration.
4 Printer Maintenance Contents Life Expectancy of Consumables . . . . . . . . . . . . . . . . . . . . . . . 4-3 T oner Cartridge Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 Saving T oner with EconoMode . . . . . . . . . . . . .
4-2 Printer Maintenance.
Life Expectancy of Consumables Alw ays inspect the components listed in T able 4-1 for wear when servicing the printer . Replace these components as needed, based on printer failures or wear , not strictly on usage.
T oner Cartridge Life The toner cartridge has been designed to simplify the replacement of the printer’ s major “consumable” parts. The toner cartridge contains the printing mechanism and a supply of toner .
proofs. EconoMode can be set through your printer dri v er . See Chapter 3 for information. Notes Some software applications may refer to this as “draft mode.
Cleaning the Printer T o maintain the print quality, thoroughly clean the printer: • • Every time you change the toner cartridge. • • After printing approximately 2,500 pages. • • Whenever print quality problems occur. Clean the outside of the printer with a lightly water -dampened cloth.
Cleaning Printer Components CAUTION T o a void permanent damage to the toner cartridge, do not use ammonia-based cleaners on or around the printer . Do not touch the transfer roller with your fingers. Contaminants on the roller can cause print quality problems.
Static Eliminator Teeth (located in front of the transfer roller) Cleaning Spilled T oner Defecti v e toner cartridges can dev elop leaks. In addition, after a paper jam has occurred, there may be some toner remaining on the rollers and guides inside the printer .
5 Functional Over view Contents Basic Printer Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 DC Controller/Po wer System . . . . . . . . . . . . . . . . . . . . . . . . . 5-4 Print Engine Control System . . . . . . . . . . . .
5 - 2 Functional Overview.
Basic Printer Functions This chapter presents a generalized functional overvie w of the printer and the printing processes. The following printer systems are discussed: • • DC Controller System/ P.
DC Controller/P ower System The DC Controller PCA coordinates all print engine activities, dri ves the laser , and coordinates print data from the Formatter PCA with the image formation process. The DC Controller also includes both A C and dc po wer supply and distribution circuitry .
Print Engine Control System Laser and Scanner Drive Based on information recei v ed from the Formatter , the DC Controller sends signals to the Laser/Scanner Assembly to modulate the laser diode ON and OFF and to dri ve the Laser/Scanner motor . Refer to “Image Formation System, ” later in this chapter for more information.
P ower System (on DC Contr oller PCA) The A C, dc, and high voltage po wer supply circuits are all contained within the DC Controller PCA. AC Power Distribution The A C po wer circuitry supplies A C v oltage whene ver the po wer cord is connected to the A C po wer source.
• • A job is received. • • The Front Panel Button is pressed. • • The printer front door is opened. Note The printer will not enter SleepMode if there is a printer error .
F ormatter System The Formatter PCA is responsible for the follo wing: • • Receiving and processing print data from the printer interface. • • Monitoring Front Panel Button and relaying printer status information. • • Developing and coordinating data placement and timing with the print engine.
Control P anel Status LED Lights The Formatter uses three LEDs mounted under the printer cov er to communicate printer status to the user . Refer to “Using the Control Panel” in Chapter 3 and “Printer Error T roubleshooting” in Chapter 7 for more information on the lights.
EconoMode The EconoMode setting uses approximately 50% less toner than standard mode printing by reducing the dot density . Ho we ver , EconoMode does not extend toner cartridge component life. EconoMode, which can also be thought of as “draft mode, ” is user-selectable through some softw are applications.
Enhanced I/O The Enhanced I/O feature allows printer memory to be used for storing data recei v ed from the host computer . When Enhanced I/O is enabled, you can send more data to your printer in shorter amounts of time, which allows you to return to your application sooner .
Image F ormation System Laser printing requires the interaction of sev eral different technologies (such as electronics, optics, and electrophotographics) to provide a printed page. Each process functions independently and must be coordinated with the other printer processes.
T oner Cartridge As the “heart” of the Image Formation System, the toner cartridge houses the cleaning, conditioning, and dev eloping steps of the process. The toner cartridge contains the photosensitiv e drum, primary charging roller , developing station, toner cavity , and cleaning station.
Step 4: Image Dev eloping At this stage of the process, the latent electrostatic image is present on the drum. The toner particles obtain a negati ve surface char ge by rubbing against the dev eloping cylinder which is connected to a negati ve dc supply .
Paper F eed S ystem Both the Paper Input Bin and the Single Sheet Input Slot mer ge into one, main input area. Paper placed in either of these areas enables the Paper Out Sensor (sensor 202), which informs the DC Controller that paper is present.
Figure 5-5 shows a simplif ied paper path and the locations of the photosensors and rollers. Simplified Paper Path Figure 5-5 5 - 16 Functional Overview.
Figure 5-6 shows the locations of the photosensors, switches, solenoid, and other important printer elements. T able 5-1 describes the function of each photosensor and the solenoid. Solenoid and Sensors Figure 5-6 No. Name Description SL1 P aper Pic k-up Solenoid Enables the P aper Pic kup Roller .
Paper J am Detection The Paper Out Sensor (PS202), Paper Re gistration Sensor (PS203), and the Paper Exit Sensor (PS201) detect when paper is moving through the printer .
Basic Sequence of Operation The Formatter PCA and the DC Controller PCA share information during printer operation. The DC Controller-to-Formatter Connector (J201) forms a link which operates as a serial data bus. This allo ws printer status, command information, and dot-image data to be passed between the two PCAs.
General Timing Diagram Figure 5-7 5 - 20 Functional Overview.
6 Remov al and Replacement Contents Remov al and Replacement Strategy . . . . . . . . . . . . . . . . . . . . . . 6-3 Required T ools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4 Installing Memory Cards (DRAM) . . . . . . . . .
6 - 2 Removal and Replacement.
Remov al and Replacement Strategy This chapter documents remov al and replacement of Field Replaceable Units (FR Us) only . Exchange assemblies should be sent to SMO for repair . Replacement is generally the re v erse of remov al. Occasionally , notes are included to provide direction for dif ficult or critical replacement procedures.
Requir ed T ools • • #2 Phillips Screwdriver • • 5.5 mm Hexhead Screwdriver • • Small Flathead Screwdri ver • • Needlenose Pliers. Caution A Posidri v scre wdriver will damage the printer’ s scre w heads. Use Phillips only . Figure 6-1 shows the dif ference between a Phillips and a Posidri v screwdri ver .
Installing Memory Cards (DRAM) 1 Unplug the power cord from the printer. You should not install a memory card while the printer is in SleepMode. 2 Open the Printer Door, remove the toner cartridge, and close the Printer Door. Protect the toner cartridge from light while you are working on the printer.
Cov ers and Doors Back Cov er 1 Unplug the power cord and remo ve the parallel cable from the back of the printer . 2 Remove the toner cartridge. 3 Lift the Input Extender assembly . Caution Y ou must lift the Input Extender when the covers are remo ved or it will break.
5 Separate the rear panel from the main cover , pulling the lower corners a way from the printer first, then using a flathead scre wdri ver to pry the two upper corners apart (Figure 6-3, callout 1). 6 T o remo v e the cover , pull it downw ard (Figure 6-3, callout 2).
EP Door Assembly 1 Unplug the power cord and remo ve the parallel cable from the back of the printer . 2 Open the EP door . 3 Remove the toner cartridge. 4 Along the door hinge, there is a flex point. Press the left tab inward to release it. The right tab will fall out easily (Figure 6-4).
Memory Door 1 Unplug the power cord and remo ve the parallel cable from the back of the printer . 2 Remove the toner cartridge. 3 Gently tip the printer onto its side so that the Control Panel is on top. 4 Carefully pull the door tab out (Figure 6-5, callout 1) and away from the printer in a gentle rocking motion (Figure 6-5, callout 2).
Main Cov er and Paper Input Assembly 1 Remove the toner cartridge. 2 Remov e memory door . Caution Remov e the memory door f irst. The door will break if you remove the Main Co ver without removing the memory door . 3 Remove the EP Door Assembly . 4 Remove the Back Co v er .
Inter nal Assemblies Control P anel 1 Remove the Printer Co v ers. 2 Release the Control Panel connector (Figure 6-7, callout 1). 3 Press the tab on the top of the Control Panel do wnward (Figure 6-7, callout 2). The Control Panel will pop out of the printer chassis.
Exit Roller Assembly 1 Remove Printer Co v ers. 2 Grasp the tabs at the lower ends of the Exit Roller b ushings and pull inward. This will release the tabs from the printer chassis (Figure 6-8, callout 1). 3 Rotate the tabs 90 degrees, clear of the printer chassis (Figure 6-8, callout 2).
Deliv ery Assembly 1 Remove the Printer Co v ers and Exit Roller Assembly . 2 Remove the EP Right-Hand assembly by pressing the tab in (Figure 6-9, callout 1) and sliding the assembly tow ard the front of the printer (Figure 6-9, callout 2). Note The EP Right-Hand assembly must be removed to access any fuser components.
3 Remove the (2) scre ws (Figure 6-10, callout 1). Once the screws hav e been removed, rotate the rear of the assembly up and lift it out of the printer . Delivery Assembly Removal (2 of 2) Caution Upon replacement, make certain that the positioning pins on the bottom of the assembly are properly positioned before tightening the screws.
Fuser Pressur e Plate 1 Remove Printer Co v ers and Deli very Assembly (Figures 6-9 and 6-10). 2 Remove the (2) scre ws (Figure 6-11, callout 1). 3 Press the Fuser Plate retainer clips out to release the Pressure Plate (Figure 6-11, callout 2). 4 Rotate the plate around and lift up to remove it (Figure 6-11, callout 3).
To reinstall: The Fuser Pressure Plate is kept in place by four locking mechanisms in each corner . Place the rear slits in the plate over the rear brackets that hold the Fusing Assembly (Figure 6-12, callout 1). Lower the plate ov er the retaining clips, pressing on both sides of the Fuser Pressure Plate (Figure 6-12, callout, 2).
Heating Element 1 Remove Printer Co v ers, Deli very Assembly (Figures 6-9 and 6-10), and Fuser Pressure Plate (Figure 6-11). 2 Remove the wire co ver (on the right side of the printer) for the Heating Element wires by pressing in on the tab and pulling outward (Figure 6-13, callout 1).
3 Disconnect the A C v oltage to the Heating Element by releasing the connector located on the DC Controller . Press down on the connector release with a small, flathead scre wdri ver (Figure 6-14, callout 1). (Since this is a small space, it is much easier to reach the connector with a scre wdri ver .
4 Remov e the wire from the wire guides along the right-side of the printer . 5 Disconnect the thermistor feedback connector in the left front side of the Fusing Assembly (Figure 6-15).
Pressur e Roller 1 Remove Printer Cov ers, Deli very Assembly (Figur es 6-9 and 6-10), Fuser Pressur e Plate (Figure 6-11), and Heating Element (Figures 6-13 through 6-15). 2 Remove the Pressure Roller guide by lifting the edge (Figure 6-16, callout 1) and then rolling it gently backward (Figure 6-16, callout 2).
F ace-Up/F ace-Down Le ver 1 Remove Printer Cov ers, Deli very Assembly (Figur es 6-9 and 6-10), Fuser Pressur e Plate (Figure 6-11), and Heating Element (Figures 6-13 through 6-15), and Pressure Roller (Figure 6-16). 2 Rotate the lev er forward 90 degrees (past the spring) and pull it straight out the front of the printer .
Fuser Exit Roller Assembly 1 Remove Printer Cov ers, Deli very Assembly (Figur es 6-9 and 6-10), Fuser Pressur e Plate (Figure 6-11), and Heating Element (Figures 6-13 through 6-15), Pressure Roller (Figure 6-16), and Face-Up/Face-Do wn L e v er (Figure 6-17).
Paper Exit Sensor Flag 1 Remove the Printer Covers, Deli very Assembly (Figures 6-9 and 6-10), and Fuser Pressure Plate (Figure 6-11). 2 Remove the P aper Exit Sensor flag by pressing do wn on the left side and pulling up on the right side.
T op Assemblies Laser/Scanner Assembly 1 Remove the Printer Co v ers. 2 Remove both Laser/Scanner connectors (Figure 6-20, callout 1). 3 Remove all (4) scre ws and lift the assem bly straight off (Figure 6-20, callout 2).
Solenoid 1 Remove the Printer Co v ers. 2 On the left side of the printer , remove the paper pickup gear (Figure 6-21, callout 1) by pressing the tabs in the center of the gear outward and pulling the gear of f (Figure 6-21).
3 Remove the Solenoid connector (J204) from the DC Controller (Figure 6-22, callout 1). 4 Remove the self-tapping scre w that holds the Solenoid in place (Figure 6-22, callout 2). 5 Unthread the wires from the printer chassis. 6 Lift the Solenoid off.
Pickup Roller Assembly 1 Remove the Printer Co v ers. 2 Remov e the paper pickup gear (Figure 6-21). Note This gear is keyed to go on the shaft in only one w ay . 3 Remove the pickup roller grounding clip on the right of the printer by lifting each end up and over the tw o metal guides and sliding the clip off (6-23).
4 Using needlenose pliers, pull the bottom of the bushing out (Figure 6-24, callout 1), then turn it counter clockwise to release it (Figure 6-24, callout 2).
To reinstall Note It is important that the Pickup Roller is placed back in with the two Idler Roller tabs up, so that they f it into the underside of the metal chassis behind the Laser/Scanner assembly (Figure 6-25).
Paper F eed Frame 1 Remove the Printer Co v ers. 2 Remove the Pickup Roller Assembly (Figures 6-23 through 6-24). 3 Release the connectors from the Laser/Scanner , T op Co ver/EP Cartridge Sensor (PS203), Switch 101, Front Control Panel (Figure 6-26).
4 Remove the (4) he x head screws from the P aper Feed Frame (Figure 6-27, callout 1). 5 Remove the self-tapping scre w from the back sheet metal plate and lift it off (Figure 6-27, callout 2).
6 Release the sensor unit connector (Figure 6-28). Paper Feed Frame Removal (2 of 2) 7 Pull the frame straight back to remove it. To reinstall The Paper Feed Frame may be easier to reinstall if you place the printer on its front, so that you can apply pressure while putting the screws back in place.
T ransfer Roller Guide & T ransfer Roller 1 Remove the Printer Co v ers, Pickup Roller Assembly (Figures 6-23 through 6-25), and Paper Feed Frame (Figures 6-26 through 6-28). 2 Looking at the back of the printer , note the two small, hook-shaped release tabs on each end of the T ransfer Roller guide.
Kick Plate 1 Remove the Printer Co v ers and the Pickup Roller Assembly (Figures 6-23 and 6-24). 2 Press the Separation Pad (Figure 6-30). Allow the Kick Plate to pi v ot upward (a spring underneath will push it up). Lift the Kick Plate off its mounting pins.
To reinstall If the spring on the Kick Plate doesn’t stay on the Kick Plate, replace the spring, making certain the diameter of the spring surrounds two lo wer pins on the Kick Plate and rests inside the third pin. Use needlenose pliers to place the spring correctly .
Separation Pad 1 Remove the Printer Co v ers, Pickup Roller Assembly (Figures 6-23 and 6-24), and Kick Plate (Figure 6-30). 2 Lift the bottom of the white plastic tab on the rear of the Paper Feed Frame up slightly and slide it up, tow ard the top of the Paper Feed Frame.
Subpads Note When you replace the Separation Pad, you should also replace the smaller subpads at the same time. 1 Place your index f i nger on the subpad.
F eed Assembly The Feed Assembly is located in the Paper Feed Frame. 1 Remove the Printer Co v ers, Pickup Roller Assembly (Figures 6-23 through 6-25), and Paper Feed Frame (Figures 6-26 through 6-28).
4 Remove the self-tapping scre w that holds the Feed Assembly in place (Figure 6-35, callout 1). Feed Assembly Removal (2 of 3) Figure 6-35 Remov al and Replacement 6 - 39.
5 Remove the Feed Assembly . 6 T urn the unit ov er . Lift the paper feed roller out (Figure 6-36). Feed Assembly Removal (3 of 3) To reinstall Before securing the scre w , ensure the tabs on the Feed Assembly are positioned in their slots on the Paper Feed Frame (Figure 6-35, callout 2).
Bottom Assemblies Memory Door Guide 1 Remove the Printer Co v ers. 2 Remove an y extra memory . 3 T wo tabs hold the memory door guide on the printer chassis.
Motor 1 Remove the Printer Co v ers. 2 Remove the motor connector (Figure 6-38, callout 1). 3 Remov e the memory door guide to e xpose the two motor scre ws.
DC Controller 1 Remove the Printer Co v ers. 2 Disconnect the motor connector from the motor (Figure 6-38, callout 1). 3 Disconnect the Solenoid connector from the DC Controller (Figure 6-22, callout 1). 4 Remove the back sheet metal plate and disconnect the PS202/PS204 connector (Figure 6-28).
8 Rotate the case forward slo wly , about three or four inches, until you can see the Fusing Assembly connector (J206). Release the connector (Figure 6-40, callout 1).
9 Rotate the metal case around so that the case is sitting on your work surface. 10 Remove the (7) remaining connectors (Figure 6-41, callout 1). 11 Remove the scre ws (5) that secure the DC Controller to the metal case (Figure 6-41, callout 2).
F ormatter PCA Caution ESD SENSITIVE!!! 1 Remove the Printer Co v ers and complete the DC Controller removal direction up to step 8 (Figures 6-39 and 6-40). 2 Remove the tw o cable clips (Figure 6-42, callout 1). 3 Remove all (4) scre ws from the formatter cover (Figure 6-42, callout 2).
7 T r oubleshooting Contents General T roubleshooting Flo wchart . . . . . . . . . . . . . . . . . . . . . . 7-3 Paper Path and Components . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5 DC Controller Diagram . . . . . . . . . . . . . . . . . .
7-2 T roubleshooting.
General T r oubleshooting Flowchart When the ac power is first applied to the printer: • • Both the printer motor and the laser/scanner motor rotate for 6 seconds. • • All of the LEDs illuminate for one second; the “Ready” LED will illuminate after 3 seconds.
General T r oubleshooting Flo wchart (continued) Refer to the section “Image Formation Troubleshooting,” later in this chapter. If the engine test produces a clear print image, yet a Self Test is not generated by initiating the Control Panel self-test procedure, replace the Formatter PCA.
Paper P ath and Components Paper Path and Components PS201 PS203 PS202 SL1 Motor Feed Roller Feed Sub Roller Pick-up Roller Paper Registration Sensor Paper Out Sensor Paper Pick-up Solenoid Photo- sen.
DC Contr oller Diagram DC Controller PCA Components J3 Control P anel Connector (Formatter PCA) J202 Paper Registration and P aper-Out Photosensors (PS203 and PS202) J102 Fusing Assem bly J206 Fusing .
Printer Err or T r oubleshooting Information regarding printer status is con veyed by two methods: 1) the printer’ s Control Panel lights and 2) feedback through the bi-directional I/O that displays at the PC. The basic method of determining error messages uses patterns of lights on the Control Panel LED.
Printer Status Messages The following table lists printer LED messages and their meanings and describes recommended actions. For more information on the Front Panel layout, refer to “Using the Control Panel” in Chapter 3, “Installation and Conf iguration.
Occasionally you may add paper , close the printer door , add the toner cartridge, and clear a paper jam, only to find that the printer still displays an error message. If this happens, troubleshoot using T able 7-3 belo w . Note If the error appears and persists only after you attempt to print a page, verify that the motor is functioning.
Service and Err or Messages Service errors prev ent further printer operation until some action is taken. When there is a service error , all of the lights will turn on in a steady state. P ress and hold the Front P a nel Button to see a pattern in the lights.
Heating Element Resistance Check Figure 7-3 LEDs Description Recommended Action Beam Err or . There are a number of causes for thi s error , and some of the causes may be transient. (They ma y disappear .) 1. P ower-cycle the printer b y unplugging the printer and plugging it bac k in.
LEDs Description Recommended Action Scanner Err or . Caus ed by a scanner malfunction. 1. P ower-cycle the printer b y unplugging the printer and plugging it bac k in. 2. Ensure condensation c aused by mo ving the printer from a cold to a warm environment hasn’ t oc curred.
Image F ormation T r oubleshooting Check the T oner Cartridge Image formation defects are many times the result of toner cartridge problems. If there is any doubt, alw ays replace the toner cartridge before troubleshooting image defects. Use the following check list to ensure that the toner cartridge is still operable.
Image Defect Examples This section illustrates some image defects and their possible causes. Since there are many v ariables in the printing process, you may encounter image defects that are not illustrated in the following e xamples.
V ertical Lines Sometimes vertically aligned black streaks or smears can appear on successi ve pages. • The toner cartridge may be damaged. Replace it. • The printer may need cleaning. See “Cleaning Your Printer,” in Chapter 4. • Replace the heating element.
Character V oids Character voids are white areas within the parts of characters that should be solid black. • If you are using transparencies when you experience this problem, try another type of transparency. Hewlett-Packard transparencies are designed to minimize character voids.
Dropouts Dropouts are characters that are partially printed. • The Paper Input Bin may have been loaded with too much paper. Make sure that no more than 100 sheets of paper are loaded. • A single sheet of paper may be defective. Try reprinting the job.
Blank Page (Occasional) A page is completely blank. If you get occasional blank pages: • Make sure your page length and margins are set correctly for the paper size you use. If you are printing on small media and your page is blank, try printing on larger media to see where the image is printing.
Dots • Clean the static charge eliminator. (See Chapter 4, “Printer Maintenance.") • There may be discontinuities in the high-voltage contact points. Clean the high voltage contact points on the toner cartridge and transfer roller. • Replace the transfer roller.
Distorted Image or BD Failure • Make certain the printer is not facing the sunlight. • The paper may not meet HP’s paper specifications. Select different paper. • Clean the Laser/Scanner Assembly by blowing compressed air in the slot on the bottom of the assembly.
T r oubleshooting Checks Engine T est The engine test print is used to verify that the print engine is functioning correctly . The Formatter PCA is completely bypassed during an engine test, so this test is useful for isolating printer problems.
Half-Self T est Functional Check The electrophotographic process can be subdivided into the follo wing stages: • • Cleaning (removing excess toner from drum surface) • • Conditioning (placing .
Drum Rotation Functional Check The photosensitiv e drum, located in the toner cartridge, must rotate for the print process to work. The photosensiti ve drum recei ves its driv e from the Main Driv e assembly . T o v erify whether the drum is rotating: 1 Open the Printer Door .
High-V oltage Po wer Supply Check The High-V oltage Power Supply PCA provides the necessary v oltages for the electrophotographic processes. A method for verifying the high-v oltage system is giv en in the table below .
Toner Cartridge High Voltage Connection Points (2 of 2) • • Charging (1) • • Drum Ground (2) • • Developing Roller (3) Figure 7-6 T roubleshooting 7-25.
Paper Curl Paper curl is inherent to the laser printing processes, and occurs when paper is subjected to heat. Paper curl tends to relax as the paper cools while resting on a flat surface. The specification for maximum paper curl when the paper is lying flat before print is 5 mm (0.
T r oubleshooting T ools Paper P ath Check If paper is not being picked up or is not mo ving through the paper path, you may want to observ e all of the paper motion acti vities.
Repetitive Image Defect Ruler Repetitive Image Defect Ruler Figure 7-8 7-28 T roubleshooting.
Main Wiring Diagram Figure 7-9 Main Wiring Diagram T roubleshooting 7-29.
Connector Signal Name Remarks J401 pin 1 MA Motor Drive S ignal J401 pin 2 /MA Motor Drive S ignal J401 pin 3 MB Motor Drive S ignal J401 pin 4 /MB Motor Drive S ignal J204 pin 1 +12 V J204 pin 2 CPUD.
Connector Signal Name Remarks J209 pin 3 DOSNS “H” when car tridge is not installed or the front door is open at PS204. J305 pin 1 +12A V J305 pin 2 N/U J305 pin 3 +12 V J206 pin 1 FRSTH Fusing te.
7-32 T roubleshooting.
8 Parts and Diagrams Contents Ho w to Use the P art Lists and Diagrams . . . . . . . . . . . . . . . . . . . . 8-3 Ordering Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3 Ordering Consumables . . . . . . . . . . . . . . . . .
8-2 Parts and Diagrams.
How to Use the P art Lists and Diagrams The Figures in this chapter illustrate the major subassemblies in the printer and their component parts. A table (material list) follows each e xploded assembly diagram.
Ordering Consumables Consumables and accessories such as those listed on T able 8-1 may be ordered from He wlett-Packard. The phone numbers are: U.S.: 1-800-538-8787 Canada: 1-800-387-3154 (T oronto) 516-671-8383 United Kingdom: 0734-441212 Germany: 0130-3322 Contact your local HP Parts Coordinator for other local phone numbers.
Accessories and Supplies The following items are a v ailable through your local authorized HP dealer . T o find a dealer near you (or if your dealer is temporarily out of stock), call the HP Customer Information Center (800) 752-0900. Note Refer to “Related Documentation” in Chapter 1 for documentation and training media product numbers.
Common Hardwar e Example Description Screw , Machine , T rus Head M3x4, M3x6, M3x8 Scre w , Star , 3x6 Screw , Self-tap , 4x10 Screw , Hex-head, 3x 8 Scre w , He xhead, 3x6,m 3x8, 3x10 Table 8-2 Commo.
Major Assembly Locations Figure 8-1 Parts and Di agra ms 8-7.
Covers and Doors Figure 8-2 8-8 Parts and Diagrams.
Ref. Part No. Ref. Description 1 RB1-7211-000CN 1 Input Extender 1 2 RB1-7212-000CN 1 Input Extender 2 3 RB1-7333-000CN 1 Bac k Cover 4 RB1-1995-000CN 1 Main Cov er 4A RB1-7278-000CN 1 F ace-up/F ace-.
Internal Components (1 of 3) Figure 8-3 8-10 Parts and Diagrams.
Ref Part No. Qty Description 1 R Y7-5005-000CN 1 Gear K it #1 2 RB 1-7288-000CN 2 Exit Roller Bushi ng 3 RB 1-7105-000CN 1 Fus er Releas e T ab 4 RB 1-7106-000CN 1 Gear Plate 5 RB1-7107-000CN 1 F ront.
Internal Components (2 of 3) Figure 8-4 8-12 Parts and Diagrams.
Ref Part No. Qty Description 1 RB1-7109-000CN 1 Memory Door Guide 2 RB1-7247-000CN 1 Fuser P aper Guide 3 RB1-7344-000CN 1 A C Cable Cov er 4 RF5-1509-000CN 1 Bac k Sheet Metal 5 RB1-7343-000CN 1 Cont.
Internal Components (3 of 3) Figure 8-5 8-14 Parts and Diagrams.
Ref Part No. Qty Description 1 RB1-7223-000CN 1 Pic kup Roller Grounding Clip 2 RB1-7246-000CN 2 PR Bushing 3 RB1-7341-000CN 1 EP Right Hand Guide #2 4 RF5-1516-000CN 1 Pressure Rol ler 5 RF5-1517-000.
DC Controller/Formatter and Cables Figure 8-6 8-16 Parts and Diagrams.
The table below lists each connector , its cable length, and the number of pins. Connector Cable Length (inches) Number of Pins Fusing Assemb ly (J206) 5.5 (14 cm) 2 Laser Driver/Beam Detec t Circuitry (J208) 21 (53 cm) 6 Door Open/No EP Car tridge (PS203) (J209) 14 (35 cm) 3 Scanner Motor (J 207) 14.
Pickup Roller Assembly Figure 8-7 8-18 Parts and Diagrams.
Ref Part No. Qty Description 1 RB1-7177-000CN 1 P aper F eed F rame 2 RY7-5008-000CN 1 Separation P ad Assembly 3 RY 7-5009-000CN 1 Input Sensor Assembly 4 RG5-1940-000CN 1 Pic kup Roller Assembly 5 R.
Feed Assembly Figure 8-8 8-20 Parts and Diagrams.
Ref Part No. Qty Description RG5-1942-000CN 1 Feed Assemb ly 9 RB1-7226-000CN 1 Idler Roller Table 8-8 Parts and Di agra ms 8-21.
Separation Guide Assembly Figure 8-9 8-22 Parts and Diagrams.
Ref Part No. Qty Description RG5-2013-000CN 1 Separation Guide Assemb ly 2 RB1-7276-000CN 1 F ace-up/face-do wn Shaft 4 RB1-7289-000CN 1 Fuser Roller Bushi ng 7 RF5-1522-000CN 1 Fuser Exit Rol ler Ass.
Delivery Assembly Figure 8-10 8-24 Parts and Diagrams.
Ref Part No. Qty Description RG5-2012-000CN 1 Delivery Assembly 1 RB1-7284-000CN 4 Delivery Roller #1 2 RB1-7285-000CN 2 Delivery Roller #2 3 RB1-7286-000CN 4 Deliv er y Spring#1 4 RB1-7287-000CN 2 De.
8-26 Parts and Diagrams.
A Parts Index Parts Index A-1.
Parts Index Description Part No. Fig. Ref. A C Cable Cov er RB1-7344-000CN 8-5 3 Back Cover RB1-7333-000CN 8-2 3 Back Grounding Clip RB1-7199-000CN 8-7 7 Back Sheet Metal RF5-1509-000CN 8-5 4 Cap RB1-.
Description Part No. Fig. Ref. F eed Assembly RG5-1942-000CN 8-8 Flag RB1-7293-000CN 8-4 18 Flag Cov er RF5-1524-000CN 8-6 2 Flag Spring RB1-7294-000CN 8-4 19 F or matter Shield RG5-2024-000CN 8-6 1 F.
Description Part No. Fig. Ref. Kic k Plate P a d RB1-7178-000CN 8-7 20 Kic k Plate Spring RS5-2501-000CN 8-7 14 Label (110V) RS5-8540-000CN 8-2 12 Label (240V) RS5-8541-000CN 8-2 12 Laser Cable RG5-20.
Description Part No. Fig. Ref. Right Sub P ad Assembly RF5-1493-000CN 8-7 12 Rock er Arm RB1-7219-000CN 8-7 19 Rock er Holder RB1-7220-000CN 8-7 10 Scanner Cable RG5-2034-000CN 8-6 12 Screw XA9-0724-0.
Part No. Description Fig. Ref. C3941-69001 DC Controller PCA (110V) Exchange 8-6 3 C3941-69002 DC Controller PCA (220V) Exchange 8-6 3 C3941-69003 Laser Scanner (Exchange) C3942-67902 Formatter (Excha.
Part No. Description Fig. Ref. RB1-7255-000CN Left PR Housing 8-4 13 RB1-7256-000CN Right PR Hous ing 8-4 12 RB1-7276-000CN F ace-up/F ace-down Shaft 8-9 2 RB1-7278-000CN F ace-up/F ace-down Switch 8-.
Part No. Description Fig. Ref. RF5-1522-000CN Fuser Exit Rol ler Assembly 8-9 7 RF5-1524-000CN Flag Co ver 8-6 2 RF5-1530-000CN T ransf er Roller Guide 8-4 6 RF5-1533-000CN PR Ground Guide 8-4 14 RF5-.
Part No. Description Fig. Ref. RS5-0796-000CN PR Gear 8-4 11 RS5-2501-000CN Kic k Plate Spring 8-7 14 RS5-2502-000CN Main S eparation P ad Spring 8-7 15 RS5-8540-000CN Label (110v) 8-2 12 RS5-8541-000.
A-10 Part s Index.
B Regulatory Inf ormation Laser Safety (U .S.A.) The Center for Devices and Radiological Health (CDRH) of the U.S. F ood and Drug Administration implemented regulations for laser products manuf actured since August 1, 1976. Compliance is mandatory for products marketed in the United States.
Laser Statement (Finland) The following applies to printer operation and servicing in Finland. LASER TUR V ALLISUUS LUOKAN 1 LASERLAITE KLASS 1 LASER APP ARA T HP LaserJet(s) 4V and 4MV laserkirjoitin on käyttäjän kannalta turvallinen luokan 1 laserlaite.
T oner Safety Note In case of toner spills, skin and clothing are best cleaned by removing as much toner as possible with a dry tissue, then washing with cold water .
FCC Statement (Class B) Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
Index A A C po wer distrib ution 5-6 circuitry 5-6 accessories and supplies 8-5 acoustic emissions 1-5 assistance,technical 1-11 A UDIO-TIPS, HP 1-11 B background scatter 7-16 black page 7-16 blank pa.
image transferring 5-12, 5 -14 image writing 5-12 - 5-13 installatio n DRAM 6-5 installing memory cards 6-5 printer 3-3 software 3-4 interfaces standard 1-3 internal as sembli es 8- 10, 8-12, 8- 14 co.
error 7-8 manual feed 7-7 memory error 7-7 paper out 7-7 Ready 7-8 self test 7-8 status 7-8 toner cartridge 7-7 troubleshooting 7-7 printer space requirements 2-4 printer timing 5-19 INTR 5-19 LSTR 5-.
print quality pro blems 7-14 printer erro rs 7-7 troubleshooting checks 7-21 troubleshooting flowchart 7-3 troubleshooting tools 7- 27 troubleshooting, prelimin ary 7-3 two-way communication, PJL 5- 1.
An important point after buying a device HP (Hewlett-Packard) 5L (C3941A) (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) 5L (C3941A) 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) 5L (C3941A) - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, HP (Hewlett-Packard) 5L (C3941A) 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) 5L (C3941A) will certainly help you make a decision on the purchase.
If you already are a holder of HP (Hewlett-Packard) 5L (C3941A), 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) 5L (C3941A).
However, one of the most important roles played by the user manual is to help in solving problems with HP (Hewlett-Packard) 5L (C3941A). Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device HP (Hewlett-Packard) 5L (C3941A) 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
