HP LaserJet 5000, 5000 N and 5000 GN Printers Service Manual

English

Copyright 1998 Hewlett-Packard Co. Printed in USA
Manual Part No. C4110-91033
Printed on at least 50%Total Recycled Fiber with at least 10% Post-Consumer Paper
*C4110-91033* *C4110-91033*

C4110-91033

HP LaserJet 5000, 5000 N, and 5000 GN Printers
Service Manual _____________
Copyright Hewlett-Packard Company 1998 All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. Publication number C4110-91033 First Edition
Warranty The information contained in this document is subject to change without notice. Hewlett-Packard makes no warranty of any kind with respect to this information. HEWLETT-PACKARD SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Hewlett-Packard shall not be liable for any direct, indirect, incidental, consequential, or other damage alleged in connection with the furnishing or use of this information.
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Hewlett-Packard Company 11311 Chinden Boulevard Boise, Idaho 83714 U.S.A.

Contents

1 Printer Description
Overview. 1-1 Printer Features. 1-2 Identification. 1-5 Model and Serial Numbers. 1-5 Site Requirements. 1-6 Space Requirements. 1-7 Paper Specifications. 1-11 Supported Types of Paper. 1-14 Guidelines for Using Paper. 1-15 Labels. 1-18 Transparencies. 1-18 Vellum. 1-18 Envelopes. 1-19 Card Stock and Heavy Paper. 1-20 Safety Information. 1-22 Laser Safety Statement. 1-22 Canadian DOC Regulations. 1-22 FCC Regulations. 1-23 Laser Statement for Finland. 1-24 Toner Safety. 1-25 Environmental Product Stewardship. 1-26

2 Service Approach

Overview. 2-1 Service Approach. 2-2 Parts and Supplies. 2-3 Ordering Information. 2-3 Helpful Documentation. 2-4 Phone Numbers for Ordering. 2-5 Exchange Program. 2-5 Consumables. 2-5 Technical Assistance. 2-5 Toner Cartridge Information. 2-8 Warranty Statement. 2-9

Contents 1

3 Printer Operation
Overview. 3-1 Using the Control Panel. 3-2 Control Panel Layout. 3-2 Control Panel Lights. 3-2 Control Panel Keys. 3-3 Settings and Defaults. 3-4 Control Panel Menus. 3-5 Information Menu. 3-6 Paper Handling Menu. 3-7 Print Quality Menu. 3-10 Printing Menu. 3-13 Configuration Menu. 3-17 I/O Menu. 3-24 EIO Menu (Networked Printers). 3-27 Resets Menu. 3-29 Service Mode. 3-30 Service Menu. 3-31 Setting the Page Count, Maintenance Count, and Serial Number. 3-31 Cold Reset Paper. 3-34 Diagnostics. 3-34 Clear Event Log. 3-34 Testing the Printer. 3-35 Resetting the Printer. 3-36 System Configuration. 3-37 MS-DOS System Configuration. 3-37 Parallel DOS Commands. 3-37 Serial MS-DOS Commands. 3-38 Printer I/O Configuration. 3-39 Parallel Menu. 3-39 Serial Configuration. 3-39

4 Printer Maintenance

Overview. 4-1 Cleaning the Printer and Accessories. 4-2 Cleaning Spilled Toner. 4-4 Preventative Maintenance. 4-5 Reset Maintenance Count. 4-5 Expected Life of Components. 4-5

Overview 2-1

Repair of the printer normally begins with use of the printers internal diagnostics in conjunction with the troubleshooting procedures in Chapter 7. Once a faulty part is located, repair is generally accomplished by assembly level replacement of Field Replaceable Units (FRUs). Some mechanical assemblies may be repaired at the subassembly level. PCA component replacement is not supported by Hewlett-Packard.

2-2 Service Approach

Parts and Supplies

Ordering Information

Field replaceable and accessory part numbers are found in Chapter 8 of this manual. Replacement parts may be ordered from HPs Support Materials Organization (SMO) or Support Materials Europe (SME). Use only accessories specifically designed for this printer. Accessories can be ordered from an authorized service or support provider. See page 2-5 and page 8-4 for more information.

Parts and Supplies 2-3

Helpful Documentation
Table 2-1 lists part numbers to order documentation.
Table 2-1. Helpful Documentation Item
HP LaserJet Printer Family Paper Specification Guide

Description or Use

A guide to using paper and other print media with HP LaserJet printers. A guide to using printer commands with HP LaserJet printers. An additional copy of the users guide.

Part Number

5021-8909
PCL 5/PJL Technical Reference Documentation Package HP LaserJet 5000, 5000 N, and 5000 GN Printers Users Guide

5021-0330

C4110-90901 (English)
An additional copy of the HP LaserJet 5000, 5000 N, and 5000 GN Printers Getting getting started guide. Started Guide HP LaserJet 5000, 5000 N, and 5000 GN Printers Quick Reference Guide Users Documentation Bundle, HP LaserJet 5000, 5000 N, and 5000 GN

C4110-90926 (English)

An additional copy of the quick C4110-90976 (English) reference guide.
An additional copy of the users guide, the getting started guide, and the quick reference guide.

C4110-99001 (English)

2-4 Service Approach
Phone Numbers for Ordering
SMO (Support Materials Organization) 1-800-227-8164 (U.S. only) SME (Support Materials Europe) (49 7031) 142253

Exchange Program

HP offers remanufactured assemblies for some parts. These are identified in Chapter 8 and can be ordered through Support Materials Organization (SMO), or Support Materials Europe (SME).

Consumables

ENVELOPE= COM10

(110 V printers)
Set the default image size for paper and envelopes. (The item name will change from paper to envelope as you scroll through the available sizes.)
The defaults indicated here are for 110 V printers. The default paper size for 220 V printers is A4. The default envelope size for 220 V printers is DL. NO YES
CONFIGURE CUSTOM PAPER=NO
NO: The custom paper menu
items are not accessible.
YES: The custom paper menu
items appear (see the next item).

Control Panel Menus 3-13

Table 3-7. Printing Menu (continued) Item UNIT OF MEASURE=INCHES

(110 V printers) or

Values INCHES MILLIMETERS
CONFIGURE CUSTOM PAPER=YES. Select the unit of
measurement for the custom paper size.

MILLIMETERS

(220 V printers)
X DIMENSION= 12.28 INCHES

3.00 to 12.28 INCHES

(110 V printers) or 76 to 312 MILLIMETERS (220 V printers)
CONFIGURE CUSTOM PAPER=YES. Select the
dimension to be fed into the printer (short edge).

312 MILLIMETERS

Y DIMENSION= 18.50 INCHES

5.00 to 18.50 INCHES

(110 V printers) or 127 to 470 MILLIMETERS (220 V printers)
CONFIGURE CUSTOM PAPER=YES. Select the other

dimension (long edge).

470 MILLIMETERS

ORIENTATION= PORTRAIT

PORTRAIT LANDSCAPE
Determine the default orientation of print on the page.
It is best to set the page orientation from the printer driver or software application. (Driver and software settings override Control Panel settings.)

FORM=60 LINES

5 to 128

64 LINES

Sets vertical spacing from 5 to 128 lines for default paper size. Press [-Value+] once to change the setting by increments of 1, or hold down [-Value+] to scroll by increments of 10.

3-14 Printer Operation

Table 3-7. Printing Menu (continued) Item PCL FONT SOURCE=INTERNAL Values INTERNAL SOFT SLOT 1, 2, or 3 Explanation INTERNAL: Internal fonts. SOFT: Permanent soft fonts. SLOT 1, 2, or 3: Fonts stored
in one of the three DIMM slots.

PCL FONT NUMBER=0

0 to 999
The printer assigns a number to each font and lists them on the PCL Font List. The font number appears in the Font # column of the printout. This item might not appear, depending on the font selected. Press [-Value+] once to change the setting by increments of.01 for pitch, or hold down [-Value+] to scroll by increments of 1. Select any one of several available symbol sets from the printers control panel. A symbol set is a unique grouping of all the characters in a font. PC-8 or PC-850 is recommended for line draw characters. Order the PCL 5/ PJL Technical Reference Documentation Package for symbol set charts or for more information see the users guide.

PCL FONT PITCH= 10.00

0.44 to 99.99

PCL SYMBOL SET=PC-8

many others

Control Panel Menus 3-15

Table 3-7. Printing Menu (continued) Item Values Explanation
Select the version of Courier font to use: REGULAR: The internal Courier font available on the HP LaserJet 4 series printers. DARK: The internal Courier font available on the HP LaserJet III series printers. Both fonts are not available at the same time. The Wide A4 setting changes the number of characters that can be printed on a single line of A4 paper. NO: Up to 78 10-pitch characters can be printed on one line. YES: Up to 80 10-pitch characters can be printed on one line. Select YES to append a carriage return to each line feed encountered in backwardcompatible PCL jobs (pure text, no job control). Some environments, such as UNIX, indicate a new line using only the line feed control code. This option allows the user to append the required carriage return to each line feed. Select ON to print the PS error page when PS errors occur.

COURIER=REGULAR

REGULAR DARK

WIDE A4=NO

APPEND CR TO LF= NO

PRINT PS ERRORS=OFF

3-16 Printer Operation

Configuration Menu

Items in this menu affect the printers behavior. Configure the printer according to your printing needs. Table 3-8. Configuration Menu Item POWERSAVE= 30 MINUTES Values OFF 15 MINUTES 30 MINUTES 1 HOUR 2 HOURS 3 HOURS Explanation
Set the printer to enter PowerSave after it has been idle for a specified amount of time. Turning PowerSave off is not recommended. The PowerSave feature does the following: 1. Minimizes the amount of power consumed by the printer when it is idle. 2. Reduces wear on the printers electronic components. (Turns off the displays backlight.) When you send a print job, press a Control Panel key, open a paper tray, or open the top cover, the printer automatically comes out of PowerSave mode.
PowerSave turns off the backlight on the display, but the display is still readable.

PERSONALITY= AUTO

AUTO PCL PS
Select the default printer language (personality). Possible values are determined by which valid languages are installed in the printer. Normally you should not change the printer language (the default is AUTO). If you change it to a specific printer language, the printer will not automatically switch from one language to another unless specific software commands are sent to the printer.

Control Panel Menus 3-17

Table 3-8. Configuration Menu (continued) Item RESOURCE SAVE= OFF Values OFF ON AUTO Explanation
Dedicate printer memory to save each languages permanent resources. (You might need to add memory to the printer in (8 MB total is required to order for this item to appear.) The amount of memory set aside can be different for see this message.) each installed language. Some languages might have memory set aside for resource saving without requiring all languages to do so. Any time the amount of memory dedicated to a specific language is changed, all languages will lose all saved resources, including any unprocessed print jobs. OFF: No language resource saving is performed, and language-dependent resources, such as fonts and macros, are lost when language or resolution changes. ON: An item will appear for each installed language that allows the user to allocate a particular amount of memory to that languages resource saving area. (See the items below.) AUTO: The printer automatically determines the amount of memory to use for each installed languages resource saving area. This item appears only when RESOURCE SAVE=ON. Select the amount of memory used for saving PCL resources. Printer default is the minimum amount of memory needed to perform resource saving for PCL. Press [-Value+] to change settings by increments of 10 (up to 100 KB) or by increments of 100 (above 100 KB).

RESTORE FACTORY SETTINGS

RESET ACTIVE I/O CHANNEL

RESET ALL I/O CHANNELS

Control Panel Menus 3-29

Service Mode

Service Mode should be used only by authorized service personnel. While in Service Mode, you can:
Verify and set the page count and serial number. These are displayed on the Configuration Page. Set the Cold Reset Default. (This sets the factory default paper size to either Letter or A4). Turn the Diagnostic Functions on or off (for developers only). Clear the event log. Set the interval at which the PERFORM PRINTER MAINTENANCE message appears on the control panel.
To enter Service Mode: 1 Hold down [Select] and [Cancel Job] while turning on the printer. (If the control panel reads INITIALIZING, the keys were released too soon.) Press the right side of the [Menu] key, then press [Select]. The message SERVICE MODE is displayed. To exit the Service Mode press [Go].

3-30 Printer Operation

Service Menu

Figure 3-2

Setting the Page Count, Maintenance Count, and Serial Number
The page count and serial numbers are stored in Non-Volatile Memory. If it is necessary to replace the Formatter PCA, the page count should be set to the current value to reflect the age of the print engine. The procedure for setting the serial number is similar to setting the page count. Note Before replacing the Formatter PCA, print a Configuration Page to verify the current page count and serial number of the printer, if possible. Use the information on the Configuration Page to reset the page count and serial number for the new Formatter PCA.

Service Mode 3-31

Page Count
The page count stored in NVRAM and displayed on the Configuration Page printout represents the number of pages which the printer has printed (excluding engine test prints). If it becomes necessary to repair a printer by installing a new Formatter, the page count must be reset so that it represents the age of the printers engine rather than the age of the Formatter. The page count value is changed using a different method than is used for other control panel values. Instead of increasing the entire value by increments, each digit can be selected and modified individually. The following control panel keys are used to modify the page count value:

[Value+]

[-Value]
Enters any changes to the current digit and advances the cursor one digit to the right. If the last digit is currently selected, pressing the [Select] key wraps the cursor around to the first digit. Increases the value of the currently selected digit by one. Pressing [Value+] when 9 is the value of the currently selected digit will change the value of the digit to 0. Decreases the value of the currently selected digit by one. Pressing [-Value] when 0 is the value of the currently selected digit will change the value of the digit to 9.

Focusing Lens BDIC PCB BD Lens
Scanner Motor Scanning Mirror (Hexahedron) Laser Driver Cylindrical Lens BD Mirror
Figure 5-11 Writing the Image Because the beam is sweeping the entire length of the drum and the drum is rotating, the entire surface area of the drum can be covered. The speed of the scanner motor (which turns the scanning mirror) and the speed of the main motor (which turns the drum) are synchronized, and each successive sweep of the beam is offset by 1/1200th of an inch. The beam can be turned on and off to place a dot of light every 1/1200th of an inch. This is how the printer achieves its 1200x1200 dpi resolution. After the writing process, the drum surface has an invisible (latent) electrostatic image. At the end of each sweep, the beam strikes the beam detect lens, generating the Beam Detect Signal (/BD). The BD signal is sent to the DC Controller Board, where it is converted to an electrical signal used to synchronize the output of data (/VDO) for one sweep (scan line) and to diagnose problems with the laser diode or scanner motor.
5-24 Functional Information

Developing the Image

The developing process develops the latent electrostatic image into a visible image on the drum. The developing unit consists of a metallic cylinder that rotates around a fixed magnetic core inside the toner cavity. Toner is a powdery substance made of black plastic resin bound to iron particles, which is uniformly attracted to the magnetic core of the cylinder. The toner particles obtain a negative surface charge by rubbing against the developing cylinder which is connected to a negative DC supply. The negatively charged toner is attached to the discharged (exposed, grounded) areas. An AC potential is applied to the developing cylinder to decrease the attraction between the toner and the magnetic core of the cylinder, and to increase the repelling action of the toner against the areas of the drum not exposed to laser light. This AC potential improves density and contrast.

Figure 5-12

Developing the Image The Print Density control in the Control Panel Menu adjusts the DC bias of the developing cylinder by changing the force of attraction between the toner and drum. A change in the DC bias causes either more or less toner to be attracted to the drum, which in turn either increases or decreases the print density. Both the primary and developer DC bias voltages are changed in response to the density setting.
Image Formation System 5-25

Transferring the Image

During the transferring process the toner image on the drum surface is transferred to the paper. A positive charge applied to the back of the paper by the transfer roller causes the negatively charged toner on the drum surface to be attracted to the page. The small diameter of the drum, combined with the stiffness of the paper, causes the paper to peel away from the drum. The static eliminator teeth also help separate the paper from the drum. The static eliminator teeth weaken the attractive forces between the negatively charged drum surface. After separation, the drum is cleaned and conditioned for the next image.

Figure 5-20

250-sheet Paper Feeder Paper Feed System 5-35

Figure 5-21

500-sheet Paper Feeder
5-36 Functional Information

Paper Jam

To detect the presence of paper and whether the paper has been correctly fed, the following paper sensors are installed:
Registration roller paper sensor (PS403) Top of page sensor (PS402) Fuser paper delivery sensor (PS1306)
If the paper does not reach or pass through any of the sensors within the specified period of time, the microprocessor (CPU) on the DC Controller PCA notifies the Formatter of a paper jam.

Paper Feed System 5-37

Duplexer
This function is to reverse the one side printed paper from the printer and refeed it into the printer. The Duplexer operation sequence is controlled by the duplex driver PCA. The duplex driver PCA has the 8-bit microcomputer, which controls the serial communications between the operation sequence control of the duplexing unit and the DC controller PCA of the printer. The duplex driver PCA drives motors and solenoids with various commands from the DC controller PCA. The duplex driver PCA also sends the status of the Duplexer back to the printer.

Reversing/Refeed System

The paper is first fed into the Duplexer with the duplex deflector in the printer. In the Duplexer, the reversing roller switches the feeding direction of the paper. After the side registration guide adjusts the side registration, the paper is sent back into the printer with the feed and refeed rollers. The reversing motor (PM1701), the side registration guide drive motor (PM1702), and the refeed motor are all stepping motors. They are controlled both in straight and reverse rotation by the microcomputer (CPU) on the duplexing driver PCA. The reversing roller is driven by the reversing motor (PM1701). The feed and refeed rollers are driven by the refeed motor (PM1703). The side registration guide is driven by the side registration guide drive motor (PM1702), and is adjusted according to the size of the paper.
5-38 Functional Information

Figure 5-22

Paper Feed for the Duplexer

Paper Feed System 5-39

Reversing System The duplexing driver PCA receives the duplex admission command from the printer first. It turns on the Duplexer deflector drive solenoid (SL1701), and the Duplexer deflector in the printer then starts to send the paper into the Duplexer. Within a specified period of time after receiving the command, the duplexing driver PCA also drives the reversing motor (PM1701) in straight rotation, and the reversing rollers 1, 2, and 3 in XX direction. Therefore, the paper is fed in XX direction (shown in the figure below).

Figure 5-23

Duplexing Unit Within a specified period of time after the trailing edge of the paper is detected with the reversing unit paper sensor (PS1701), the duplex driver PCA pauses the rotation of the reversing motor (PM1701). The duplex driver PCA then switches the reversing motor (PM1701) to reverse rotation. As the paper is fed along the feed guide, it is fed through the reversing roller 4 and the feed roller 1 of the Duplexer.

Figure 6-49

Direction to slide sensor to remove it
6-60 Removing and Replacing Parts

Figure 6-50

Detail of Bin Full Sensor

Removing Assemblies 6-61

Power Connection
Remove the Top Cover (page 6-12), Left Side Cover (page 6-23), and Rear Door / Rear Output Bin (page 6-10). Disconnect the two cables from the Power Connection. Remove the two self-tapping screws. Remove the Power Connection.

Figure 6-51

Cables Screws
6-62 Removing and Replacing Parts

Registration Assembly

1 Remove the Top Cover (page 6-12), Left Side Cover (page 6-23), Pickup Gear Assembly (page 6-36), and the Main Gear Assembly (page 6-34). Release the E-ring on the Registration Assembly Clutch, and remove the Clutch (Figure 6-34 on page 6-43). Remove the two common machine screws in the top middle of the printer. (These screws are already removed if you have removed the Paper Feed Roller Assembly. They are common between the Paper Feed Roller Assembly and the Registration Assembly. Refer to page 6-44 for screw location.) Remove the four self-tapping screws inside the chassis. (Lift up the small green handle of the Registration Assembly to access two of these screws.) Lift the Registration assembly out of the chassis.

Figure 6-52

Screw location

Removing Assemblies 6-63

Figure 6-53
Registration Assembly Clutch
Flat Alignment Tab Stabilizer
When reinstalling the clutch, orient the shaft with the flat spot up. When the clutch slides on, the slotted metal alignment tab will seat onto a plastic stabilizer. Make sure that the cable is situated away from the Registration Assembly before you reinstall the Assembly.
6-64 Removing and Replacing Parts

Upper Delivery Assembly

1 Remove the Top Cover (page 6-12), Rear Door/Rear Output Bin (page 6-10), and Left and Right Side Covers (page 6-23), Main Gear Assembly (page 6-34),.

Figure 6-54

Upper Delivery Assembly (rear left view of printer)

Item A B 2

Upper Delivery Assembly Delivery Roller
Face the left side of the printer. The Delivery Assembly is secured with tabs on each side. Use a screwdriver to gently release the tab on the inside, and then lift the assembly out. Be careful not to lift it too high until you release the tab on the opposite side. See Figure 6-55.

Table 7-17. Distorted Image Possible Cause
Printers operating Make sure the printers operating environment meets environment does not specifications. meet specifications. Wrong output bin for paper type. Print to a different output bin.
Troubleshooting the Printing System 7-59
Table 7-17. Distorted Image (continued) Possible Cause
Poor connection of cables to the Laser Scanner. Poor connection of cables to the DC Controller Assembly. Defective Laser Scanner. Defective Engine Controller Board.
Reseat the cables connected to the Laser Scanner.
Reseat the cables connected to the DC Controller Assembly.
Replace the Laser Scanner.
Replace the Engine Controller Board.
Table 7-18. Dropouts Possible Cause
Paper might be too smooth.
Check the paper (or other print media) type and quality.
Printers operating Make sure the printers operating environment meets environment does not specifications. meet specifications. Wrong toner density setting. From the Print Quality Menu on the Control Panel, adjust the toner density setting. Make sure EconoMode is off. From the Paper Handling Menu on the Control Panel, change the Fuser Mode setting or choose another paper type from the printer driver.
Wrong Fuser setting for paper type.
Single sheet of paper Try reprinting the job. defective.

7-60 Troubleshooting

Table 7-18. Dropouts (continued) Possible Cause Action
Paper does not meet Try a different paper lot (see HP LaserJet Printer Family Paper Specifications Guide). specifications. The paper moisture content, conductivity, or surface finish may not work correctly with the electrophotographic process. DC Controller Replace the DC Controller. defective (low primary voltage). High Voltage Power Replace the High Voltage Power Supply PCA. Supply PCA defective. Transfer Roller defective. Replace the Transfer Roller.
See also Blank Spots on page 7-55.
Table 7-19. Faded Print/Bubbles Possible Cause Action
No drum ground path. Check the contacts for functionality. If dirty, clean using alcohol; if damaged, replace the High Voltage Power Supply PCA. Toner supply is low. Shake the cartridge gently to redistribute the toner, or replace the cartridge. Change to a darker setting and retry printing.
Print Density is set incorrectly.
Troubleshooting the Printing System 7-61
Table 7-19. Faded Print/Bubbles (continued) Possible Cause Action
Turn EconoMode off. EconoMode is on. EconoMode saves toner by reducing the dot density. This may appear to be a print quality problem in some cases. Paper does not meet Try a different paper lot (see HP LaserJet Printer Family Paper Specifications Guide). specifications. The moisture content, conductivity, or surface finish may not work correctly with the electrophotographic process. Inspect the Transfer Roller for proper installation and Transfer Roller is defective or incorrectly contact. If the Transfer Roller is damaged, replace it. installed. If the transfer roller loses conductivity, it cannot effectively pull toner from the drum to the paper. Laser/Scanner door is not opening properly. 1. Remove and reseat the toner cartridge. 2. Check the Laser/Scanner shutter door for proper operation. If defective, replace the Laser/Scanner Assembly.

Defective Laser Scanner.

Defective High Replace the High Voltage Power Supply PCA. Voltage Power Supply. See also Faded Print/Bubbles on page 7-61.
Table 7-24. Loose Toner Possible Cause

Dirt in the printer.

1. Print a few more pages to see if the problem corrects itself. 2. Clean the inside of the printer (page 4-2) or use the printers cleaning page (page 4-4). Replace the Toner Cartridge.
Toner Cartridge is defective. Paper might be too smooth. Wrong Fuser setting for paper type.
Check the paper (or other print media) type and quality. From the Paper Handling Menu on the Control Panel, change the Fuser Mode setting or choose another paper type from the printer driver. Replace the Fuser.

Defective Fuser.

7-66 Troubleshooting
Table 7-25. Repetitive Defects Possible Cause Action
Inspect the drum for scratches or damage. Replace Toner Cartridge is the Toner Cartridge. damaged. The circumference of the photoconductive drum inside the toner cartridge is 94 mm (3.7 inches). If the defect repeats at this interval, the defect is associated with the drum. Dirty Rollers. Any dirty Examine and clean rollers in the paper path. roller in the paper path may result in a repetitive print defect. Clean the Fusing Assembly using alcohol. If the Fusing Assembly is dirty or defective. The problem persists, replace the Fusing Assembly. circumference of the lower fusing Pressure Roller is 86 mm (3.46 inches). If the defect repeats at this interval, the defect is associated with the Pressure Roller. Gears are worn, causing slippage or jumping. Paper does not meet specifications: The surface of the paper may be too coarse, causing repeated marks. Inspect the gears driving the Toner Cartridge and the Fuser. Replace the Main Drive Assembly if necessary. Try a different paper lot (see HP LaserJet Printer Family Paper Specifications Guide).
Troubleshooting the Printing System 7-67
Table 7-26. Skew Possible Cause
Make sure paper is loaded correctly and that the Paper is not loaded correctly or trays are guides fit properly against the paper stack. not adjusted properly. Registration Assembly Be sure that the Registration Assembly is installed is improperly installed. correctly.

The JetDirect Configuration Page shown in Figure 7-7 contains valuable information regarding the current status of the EIO accessories. Before attempting to troubleshoot a network problem or notifying your network consultant of a problem, always print a Configuration Page. See the HP JetDirect Print Server Software Installation Guide for detailed explanations of network issues.

7-76 Troubleshooting

Network statistics

I/O card status

IP address

Node name

Novell status

Figure 7-7

JetDirect Configuration Page
Troubleshooting the Printing System 7-77

JetDirect Configuration

If the EIO JetDirect Card has successfully powered up and completed its internal diagnostics, the I/O CARD READY message appears. If communication is lost, an I/O NOT READY message appears followed by a two digit error code. See the HP JetDirect Network Interface Configuration Guide for further details and recommended action. The Network Statistics column indicates that network activity has been occurring. Bad packets, framing errors, unsendable packets and collisions should be minimal. If a high percentage (greater than one percent) of these occur, contact the network administrator. All of the statistics are set to zero when the printer is powered-off. The Novell Status block should state the Novell printer server name to which the printer is connected. If the node name reads NPIxxxxxx (xxxxxx=last six digits of the EIOs LAN address), the EIO card has not been configured for a Novell server. This could indicate that the card is operating under an IPX protocol other than Novell. Consult with the network administrator if the Node Name is not present. In the TCP/IP protocol block, the default IP address is 192.0.0.192. It is acceptable to operate the printer with this default address. The error message ARP DUPLICATE ADDRESS may appear in this block. This is also an acceptable error code if the TCP/IP protocol is not being used. Check with the network administrator to determine the correct IP Address for the printer.

7-78 Troubleshooting

Reference Diagrams

Locations of Components

Figure 7-8

Reference Diagrams 7-79

Figure 7-9

250-sheet Paper Feeder

7-80 Troubleshooting

Figure 7-10

Reference Diagrams 7-81

Figure 7-11

7-82 Troubleshooting

Figure 7-12

Reference Diagrams 7-83

Figure 7-13

7-84 Troubleshooting

Figure 7-14

Reference Diagrams 7-85

Figure 7-15

7-86 Troubleshooting

Figure 7-16

Paper Feed Roller Assembly Sensor Flag Lever Sensor Flag Spring Sensor Cable Photo Sensor
Illustrations and Parts Lists 8-27

Figure 8-12

Registration Roller Assembly

8-28 Parts and Diagrams

Table 8-15. Registration Roller Assembly Item No. Part No.

1 RG5-3524-000CN

Illustrations and Parts Lists 8-29
1 Figure 8-13 250-sheet Tray

8-30 Parts and Diagrams

Table 8-16. 250-sheet Tray Item No. Part No.
5 C4116A RB2-2037-000CN RB2-2020-000CN RB2-2042-000CN RF5-3585-000CN
250-sheet Universal Paper Tray Tray Cover Tray Extension Universal Tray Extension Lock Separation Pad/Spring
Illustrations and Parts Lists 8-31
1 Figure 8-14 Main Drive Assembly

8-32 Parts and Diagrams

Table 8-17. Main Drive Assembly Item No. Part No.
RG5-3543-000CN RB2-1856-000CN RH7-1356-000CN XA9-0267-000CN
Main Gear Assembly Toner Cartridge Engagement Arm Main Motor Screw, TP, M3x6
Illustrations and Parts Lists 8-33

Figure 8-15

Table 8-18. Pickup Drive Assembly Item No. Part No.
3 RG5-3544-000CN RH7-5193-000CN XA9-0815-000CN
Pickup Gear Assembly Pickup Solenoid Screw, TP, M3x4

8-34 Parts and Diagrams

PCA Assembly Locations
Table 8-19. PCA Assembly Locations Item No. Part No.
RG5-3560-000CN RG5-3517-000CN RH3-2195-000CN RH3-2196-000CN
Paper Handling PCA DC Controller Power Supply (100 - 120 V) Power Supply (220 - 240 V)
Illustrations and Parts Lists 8-35
3 Figure 8-17 Printer Controller Assembly
Table 8-20. Printer Controller Assembly Item No. Part No.
3 RH2-5337-000CN RB2-1790-000CN RB2-1791-000CN
Flat Cable Sensor Mount (Rear of Controller Pan) Sensor Lever

8-36 Parts and Diagrams

Figure 8-18
Table 8-21. Fuser Item No. Part No.
Fuser (100 - 120 V) Fuser (220 - 240 V)
Illustrations and Parts Lists 8-37
12 Figure 8-19 500-sheet Feeder

8-38 Parts and Diagrams

Table 8-22. 500-sheet Feeder Item No. Part No.
13 RB2-3211-000CN RB2-3235-000CN RB2-3236-000CN RB2-3237-000CN RB2-3238-000CN RB2-3239-000CN RB2-3284-000CN RB2-3213-000CN RB2-3286-000CN RG5-4180-000CN XB1-2300-407CN XB4-7401-007CN XB4-7300-807CN RB2-3262-000CN RB2-3247-000CN
Right Mount Front Cover Right Auxiliary Cover Left Auxiliary Cover Right Cover Left Cover Leaf Spring Inner Cover Leaf Spring Left Frame Assembly Screw, Mach., Truss Head, M3x4 Screw, Tapping, Pan Head, M4x10 Screw, Tapping, Truss Head, M3X8 Return Cover (Figure 6-70 on page 6-81) Tray Cover, 500-sheet Feeder

Illustrations and Parts Lists 8-43
Lower Delivery Roller Spring Lower Delivery Shaft Gear M3x6 Screw, Mach., Truss Head M3x8 Screw, Tapping, Truss Head Main Gear Assembly Main Motor On/Off Switch Pad Assembly Paper Arm Paper Feed Belt Paper Feed Clutch Paper Feed Gear Paper Feed Gear Paper Feed Pulley Paper Feed Roller Assembly Paper Feed Shaft Paper Feed Shaft Paper Guide Paper Guide Paper Handling PCA Paper Pickup Roller Assembly (Tray 2) Paper Pick Up Solenoid Paper Sensor Lever Paper Sensor Lever Paper Sensor Lever Spring Paper Sensor Lever Spring Photo Sensor Pickup Gear Assembly Pickup Roller Pickup Roller 250-sheet Trays Pickup Roller 500-sheet Feeder Pickup Shaft Bushing - Tray 1 and 2 Pickup Shaft Bushing - Tray 1 and 2 Pickup Solenoid Power Connector Power Inlet Assembly Power Supply (100 - 120 V) Power Supply (220 - 240 V) Rear Cover Assembly
RB1-6252-000CN RS6-0357-000CN XB1-2300-607CN XB4-7300-807CN RG5-3543-000CN RH7-1356-000CN RB2-1744-000CN RF5-2399-000CN RF5-2635-000CN RG5-3526-000CN RH7-5192-000CN RS6-0351-000CN RS6-0352-000CN RB1-6195-000CN RG5-3522-000CN RB2-1886-000CN RB1-6192-000CN RB2-1970-000CN RB2-1780-000CN RG5-3560-000CN RG5-3521-000CN RH7-5195-000CN RB2-1782-000CN RB2-1781-000CN RB2-1784-000CN RB2-1783-000CN WG8-5362-000CN RG5-3544-000CN RB2-1820-000CN RB2-1821-000CN RF5-2636-000CN RB1-6179-000CN RB1-6177-000CN RH7-5193-000CN WS6-5092-000CN RG5-3545-000CN RH3-2195-000CN RH3-2196-000CN RG5-3551-000CN
Table 8-9 on page 8-19 Table 8-7 on page 8-14 Table 8-8 on page 8-17 Table 8-23 on page 8-41 Table 8-17 on page 8-33 Table 8-17 on page 8-33 Table 8-8 on page 8-17 Table 8-9 on page 8-19 Table 8-23 on page 8-41 Table 8-12 on page 8-23 Table 8-7 on page 8-14 Table 8-13 on page 8-25 Table 8-13 on page 8-25 Table 8-13 on page 8-25 Table 8-14 on page 8-27 Table 8-13 on page 8-25 Table 8-13 on page 8-25 Table 8-5 on page 8-10 Table 8-8 on page 8-17 Table 8-19 on page 8-35 Table 8-12 on page 8-23 Table 8-7 on page 8-14 Table 8-7 on page 8-14 Table 8-7 on page 8-14 Table 8-7 on page 8-14 Table 8-7 on page 8-14 Table 8-14 on page 8-27 Table 8-18 on page 8-34 Table 8-8 on page 8-17 Table 8-12 on page 8-23 Table 8-23 on page 8-41 Table 8-8 on page 8-17 Table 8-8 on page 8-17 Table 8-18 on page 8-34 Table 8-7 on page 8-14 Table 8-8 on page 8-17 Table 8-19 on page 8-35 Table 8-19 on page 8-35 Table 8-5 on page 8-10

8-44 Parts and Diagrams

Rear Door Sensor Assembly Registration Roller Assembly Return Cover, 500-sheet Feeder Right Auxiliary Cover, 500-sheet Feeder Right Bushing Right Bushing Lower Delivery Roller Right Corner Cover Right Cover, 500-sheet Feeder Right Latch Block Right Latch Plate Right Mount Right Pickup Roller Bushing Right Pickup Roller Collar Right Roller Cam Right Side Cover Assembly Roller Holder Roller Mount 1 Roller Spring Screw, Long DC Controller Screws (M3x25) Screw, M3x4 TP Screw, M3x6 TP Screw, M3x8 TP Screw Screw, M4x10 Pan Head Tapping Screw, M4x16 W/Washer Screw, M4x6 Screw w/Washer Screw, M4x6 W/Washer Screw, M4x8 Truss Head Tapping Screw, Mach., Truss Head, M4x10 Screw, with Spring Sensor Cable Sensor Flag Lever Sensor Flag Spring Sensor Lever Sensor Mount (Rear of Controller Pan) Separation Pad/Spring Shutter Lever Small Paper Feed Belts Spring

For the complete PDF manual please visit www.LaserPros.com.

English

HP LaserJet 5000, 5000 N and 5000 GN Printers Service Manual
HP LaserJet 5000, 5000 N, and 5000 GN Printers
Service Manual _____________
Copyright Hewlett-Packard Company 1998 All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. Publication number C4110-91033 First Edition
Warranty The information contained in this document is subject to change without notice. Hewlett-Packard makes no warranty of any kind with respect to this information. HEWLETT-PACKARD SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Hewlett-Packard shall not be liable for any direct, indirect, incidental, consequential, or other damage alleged in connection with the furnishing or use of this information.
Trademark Credits PostScript is a trademark of Adobe Systems Incorporated which may be registered in certain jurisdictions. CompuServe is a U.S. trademark of CompuServe, Inc. Windows is a U.S. registered trademarks of Microsoft Corporation. TrueType is a U.S. trademark of Apple Computer, Inc. ENERGY STAR is a U.S. registered service mark of the U.S. EPA.
Hewlett-Packard Company 11311 Chinden Boulevard Boise, Idaho 83714 U.S.A.

Contents

1 Printer Description
Overview. 1-1 Printer Features. 1-2 Identification. 1-5 Model and Serial Numbers. 1-5 Site Requirements. 1-6 Space Requirements. 1-7 Paper Specifications. 1-11 Supported Types of Paper. 1-14 Guidelines for Using Paper. 1-15 Labels. 1-18 Transparencies. 1-18 Vellum. 1-18 Envelopes. 1-19 Card Stock and Heavy Paper. 1-20 Safety Information. 1-22 Laser Safety Statement. 1-22 Canadian DOC Regulations. 1-22 FCC Regulations. 1-23 Laser Statement for Finland. 1-24 Toner Safety. 1-25 Environmental Product Stewardship. 1-26

2 Service Approach

Overview. 2-1 Service Approach. 2-2 Parts and Supplies. 2-3 Ordering Information. 2-3 Helpful Documentation. 2-4 Phone Numbers for Ordering. 2-5 Exchange Program. 2-5 Consumables. 2-5 Technical Assistance. 2-5 Toner Cartridge Information. 2-8 Warranty Statement. 2-9

Contents 1

3 Printer Operation
Overview. 3-1 Using the Control Panel. 3-2 Control Panel Layout. 3-2 Control Panel Lights. 3-2 Control Panel Keys. 3-3 Settings and Defaults. 3-4 Control Panel Menus. 3-5 Information Menu. 3-6 Paper Handling Menu. 3-7 Print Quality Menu. 3-10 Printing Menu. 3-13 Configuration Menu. 3-17 I/O Menu. 3-24 EIO Menu (Networked Printers). 3-27 Resets Menu. 3-29 Service Mode. 3-30 Service Menu. 3-31 Setting the Page Count, Maintenance Count, and Serial Number. 3-31 Cold Reset Paper. 3-34 Diagnostics. 3-34 Clear Event Log. 3-34 Testing the Printer. 3-35 Resetting the Printer. 3-36 System Configuration. 3-37 MS-DOS System Configuration. 3-37 Parallel DOS Commands. 3-37 Serial MS-DOS Commands. 3-38 Printer I/O Configuration. 3-39 Parallel Menu. 3-39 Serial Configuration. 3-39

4 Printer Maintenance

Overview. 4-1 Cleaning the Printer and Accessories. 4-2 Cleaning Spilled Toner. 4-4 Preventative Maintenance. 4-5 Reset Maintenance Count. 4-5 Expected Life of Components. 4-5

5 Functional Information

Overview. 5-1 Printer Subsystems. 5-2 Power Supply System. 5-3 AC/DC Power Distribution. 5-3 Overcurrent Overvoltage Protection. 5-5 High Voltage Power Distribution. 5-6 Toner Cartridge Detection. 5-7 DC Controller System. 5-7 Laser and Scanner Drive. 5-8 Paper Motion Monitoring and Control. 5-9 Solenoids, Sensors, Clutches, and Switches. 5-9 Engine Test Print. 5-9 Motors. 5-10 Formatter System. 5-12 PowerSave. 5-12 Resolution Enhancement technology (REt). 5-13 EconoMode. 5-13 Input/Output. 5-14 CPU. 5-14 Printer Memory. 5-15 Random Access Memory (RAM). 5-15 DIMM Slots. 5-16 Memory Enhancement technology (MEt). 5-16 Page Protect. 5-16 PJL Overview. 5-17 PML. 5-17 Control Panel. 5-17 Image Formation System. 5-18 Toner Cartridge. 5-20 Photosensitive Drum. 5-21 Writing the Image. 5-24 Developing the Image. 5-25 Transferring the Image. 5-26 Image Fusing/Variable Fusing Temperature. 5-27 Paper Feed System. 5-29 Clutches and Sensors. 5-30 Printing from Tray 1. 5-31 Printing from Tray 2. 5-33 Printing from the Optional 500-sheet and 250-sheet Trays. 5-35 Paper Jam. 5-37 Duplexer. 5-38 Paper Jam in the Duplexer. 5-44 Basic Sequence of Operation. 5-45

Contents 3

6 Removing and Replacing Parts
Overview. 6-1 User Installable Accessories. 6-2 Removal and Replacement Strategy. 6-7 Required Tools. 6-7 Removing Covers. 6-10 Rear Door / Rear Output Bin. 6-10 Top Cover. 6-12 Control Panel Overlay and Control Panel. 6-15 Toner Cartridge Door Assembly. 6-17 Front Cover and Tray 1. 6-18 Front Cover Pins. 6-20 Face Down Assembly. 6-21 Left and Right Side Covers. 6-23 Tray 1 Inner Cover. 6-24 Right and Left Corner Covers. 6-26 Removing Assemblies. 6-27 Transfer Roller Assembly. 6-28 Fuser. 6-30 Paper Handling PCA. 6-31 Main Gear Assembly. 6-35 Pickup Gear Assembly. 6-37 Tray 1 Pickup Solenoid. 6-39 Fan. 6-40 Formatter Assembly. 6-41 Tray 1 Roller. 6-42 Tray 2 Roller. 6-43 Paper Feed Roller Assembly. 6-44 DC Controller Board and Power Supply. 6-47 Paper Feed Belt Assembly. 6-51 Tray 1 Shaft. 6-53 Tray 2 Shaft. 6-55 Tray 1 Lift Plate. 6-57 Tray 1 Separation Pad. 6-58 Paper Guide. 6-59 Paper Path Detect Sensor. 6-60 Face Down Bin Full Sensor. 6-61 Power Connection. 6-63 Registration Assembly. 6-64 Upper Delivery Assembly. 6-66 Delivery Roller Removal. 6-68 Laser Scanner Assembly. 6-70 Main Motor. 6-71 Toner Cartridge Guides. 6-72 Power Inlet Assembly. 6-73

Optional 500-sheet Tray Disassembly. 6-74 Tray Indicator Assembly. 6-76 Left Front Corner Cover Installation. 6-77 Paper Size Spring Assembly. 6-78 D-roller and Feed Roller. 6-79 Gear Assembly and PCA. 6-81 Power Connector. 6-82 Separation Roller. 6-83

7 Troubleshooting

Overview. 7-1 Troubleshooting Process. 7-2 Troubleshooting Process Flow. 7-4 Troubleshooting the Printing System. 7-6 Preliminary Operating Checks. 7-6 Power On. 7-7 Display. 7-11 Event Log. 7-12 Printer Messages. 7-16 General Paper Path Troubleshooting. 7-41 Information Pages. 7-44 Image Quality. 7-49 Interface Troubleshooting. 7-77 Reference Diagrams. 7-80 Locations of Components. 7-80 Sensors and Signals. 7-88 DC Controller PCA Inputs and Outputs. 7-107

8 Parts and Diagrams

Overview. 8-1 How To Use the Parts Lists and Diagrams. 8-2 Accessories and Supplies. 8-4 Common Hardware and Replacement Cables. 8-6 Illustrations and Parts Lists. 8-7 Alphabetical Parts List. 8-39 Numerical Parts List. 8-44

Contents 5