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October 1998 Edition
HP Color LaserJet Family
Quick Reference Service Guide
HP Color LaserJet Family
Quick Reference
Service Guide
October 1998 Edition
© 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 5040-9071
First edition, October 1998
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
Adobe™ and PostScript ™ are registered trademarks of Adobe Systems, Inc., which may be registered in certain jurisdictions.
Microsoft®is a U.S. registered trademark of Microsoft Corporation.
MS-DOS®is a U.S. registered trademark of Microsoft Corporation.
UNIX®is a registered trademark in the United States and other countries, licensed exclusively through X/Open Company Limited.
Hewlett-Packard Company
11311 Chinden Boulevard
Boise, Idaho 83714 U.S.A.
Contents
1 Troubleshooting control panel messages . . . . . . . . . . . . . 1 2 Service tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 3 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 4 Input/Output (I/O) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 5 Media specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 6 Toner cartridge information . . . . . . . . . . . . . . . . . . . . . . 83 7 Printer options and consumables . . . . . . . . . . . . . . . . . . 95 8 Printer parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 9 Image quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 10 Wiring diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153 11 Services and support resources . . . . . . . . . . . . . . . . . 157 A Acronyms and abbreviations . . . . . . . . . . . . . . . . . . . . 169
Index
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iii |
Ordering other manuals
This HP Color LaserJet Family Quick Reference Service Guide has been created to help the HP LaserJet service engineer quickly troubleshoot common printer problems. While this reference is intended to provide information the service engineer will need for on-site repair of HP LaserJet color products, it is not intended to replace the service manual for any HP LaserJet color product. For detailed information about the HP LaserJet color products described in this guide, see the user guide or service manual for that product.
Service manuals for HP LaserJet products are available from Hewlett-Packard. The phone number for the Service Parts Order Desk is:
(800) 227-8164 (U.S. only)
If you are located outside of the U.S., contact your local HP Sales and Service Office. See “Services and support resources” on page 157.
Supported products
Name used in |
Model |
Maximum |
Service |
this guide |
number |
pages per |
manual part |
|
|
month |
number |
HP Color LaserJet |
C4084A/C4089A/ |
35 K |
C4084-90958 |
4500/4500 N/ |
C4094A |
|
|
4500 DN |
|
|
|
|
|
|
|
Note
This guide will be updated as the service needs change, as new products are introduced, or as information becomes available.
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1 Troubleshooting control panel messages
Overview
This chapter provides a list of control panel messages for the HP Color LaserJet printers. Alphabetical messages are listed first, followed by numerical messages. Control panel messages that are self-explanatory are not included. See the service manual for more detailed information.
Following the control panel messages are suggestions for troubleshooting paper path problems.
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Overview 1 |
Pre-troubleshooting checklist
WARNING!
Always unplug the printer before servicing. Current is present in the DC power supply whenever the printer is plugged in.
Note
The customer is responsible for ensuring that the maintenance units are in good condition.
Before troubleshooting any specific printer problem, check the following:
•Has the printer been maintained on a regular basis?
•Are all of the maintenance units within their rated life?
•Is the customer using media as specified in Chapter 5, “Media specifications” and the HP LaserJet Family Paper Specification Guide?
•Is the media stored correctly and within environmental limits?
•Is the printer installed on a solid, level surface?
•Has the line voltage been checked to make sure that it does not vary more than 20% from the nominal rated value specified on the powerrating label?
–Large motors used near the printer can cause temporary voltage changes.
•Is the operating environment within the parameters listed in the printer service manual?
•Is the printer protected from substances such as office cleaning materials and the ammonia gas that is produced by diazo copiers?
•Is the printer protected from direct sunlight?
2 Chapter 1 Troubleshooting control panel messages |
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CAUTION
Using non-HP components, such as toner, may cause permanent
damage to the printer.
1
•Have all non-HP components (toner, typeface DIMMs, memory boards, and MIO cards) been removed from the printer?
•Has the printer hardware or software configuration changed? Or could the problem be associated with any specific software?
–Contact the Customer Care Center for software-related problems (see Chapter 11, “Services and support resources”).
•Could the problem be related to network configuration changes?
–Remove the printer from the network and make sure that the failure is associated with the printer before beginning troubleshooting.
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Pre-troubleshooting checklist 3 |
Control panel messages
Alphabetical messages
Access denied, menus locked
This message is displayed for approximately 5 seconds when a user has attempted to select a menu value while the printer control panel locking is enabled.
•See the system administrator for access to the printer control panel.
Bad duplexer connection
The duplex-printing accessory is not correctly installed.
1Check the duplex-printing accessory power cord.
2Turn the printer off, and then turn the printer on.
3If the error continues, verify that the duplex-printing accessory is correctly installed.
4If the error persists, replace the duplexer.
Calibration executing
The printer is executing an internal color calibration. This process should take approximately 90 seconds.
•No action is required.
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Canceling job
The printer is canceling the current print job. Incoming data for the |
1 |
current job will be discarded. |
• No action is required.
Cannot duplex check rear bin alternates with
Cannot duplex check paper
The printer cannot duplex because the rear output bin is open or the media is not supported by the duplex-printing accessory.
1Close the rear output bin.
2Verify that the media is supported by the duplex-printing accessory.
Checking printer
The printer is performing an internal test. This process should take approximately 30 seconds. The message is displayed during the initiation of the engine test. When finished, the printer goes online.
•No action is required
Clearing paper from printer
The printer has jammed or was turned on and media was detected in the paper path. The printer is attempting to clear these pages.
•No action is required.
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Control panel messages 5 |
Close middle front drawer
The drawer that holds the intermediate transfer belt (ITB) is open. Switch SW1 indicates the drawer is open. When the drawer is closed, a plastic protrusion on the lower left corner of the drawer pivots an arm allowing SW1 to toggle to the open position.
1Close the middle front drawer.
2If the message persists, remove the printer’s left-side cover and inspect the mechanical linkage that closes SW1.
3Refer to the wiring diagram to verify the wiring; the two-wire connector should be firmly seated to SW1 and the wiring harness should be firmly seated to connector J1003 of the DC controller PCB.
4If the message persists, use an ohmmeter to verify the functionality of SW1.
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Close upper rear door
Switch SW5 monitors the closing of the printer’s upper rear door (this
door allows you to access the fusing assembly). When the fusing door 1 is closed, a tab on the rear door pushes a door switch actuator that runs along the left side of the printer and closes SW5.
WARNING!
High voltages occur during operation. Closing the rear door and the upper and middle front drawers closes SW4 and SW5, enabling +24B Vdc. When either drawer or the rear door is open +24B Vdc is disabled. This safety feature protects the operator from high voltages.
1Close the upper rear door.
2If the message persists, remove the printer’s left-side cover and inspect the mechanical linkage of SW5 and the lever.
3Refer to the wiring diagram and verify that all connections (J103 of the DC controller PCB and SW5) are firmly seated.
4Verify that both the front upper and middle drawers are firmly closed; closing these drawers also closes SW4.
Close top cover
SW2 indicates if the printer’s toner cartridge access door is closed. When the toner cartridge door is closed a lever is pushed down. This in turn rotates a pivot forward, opening the top cover switch (SW2).
1Close the top cover.
2If the message persists, remove the printer’s top cover and verify all mechanical linkages associated with SW2.
3Verify that the connector on J1003 of the DC controller PCB is firmly seated.
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Control panel messages 7 |
Close upper front drawer
The drawer that holds the imaging drum is open. Switch SW3 indicates that the drawer is open. When the drawer is closed a plastic protrusion on the lower left corner of the drawer pivots an arm that allows SW3 to toggle to the open position.
Note
Closing the drawer also closes SW4 (the front drawer switch). When SW4 is open +24B Vdc is disabled. This safety feature protects the operator from any high voltages when the upper or middle front drawers are open.
1Open the drawer and firmly push the drawer closed using one hand in the middle of the drawer.
2If the message persists, remove the printer’s left-side cover and inspect the mechanical linkage that closes SW3.
3Refer to the wiring diagram (chapter 10) and verify the wiring; the two-wire connector should be firmly seated to SW3 and the wiring harness should be firmly seated to connector J1003 of the DC controller PCB.
4If message persists, use an ohmmeter to verify the functionality of SW3.
Cold reset
The cold reset power-up sequence has been entered.
•Most printer variables will reset to their factory default values.
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Continuous page, press cancel job
The printer configuration page is being printed continuously. |
1 |
• Press CANCEL JOB to terminate continuous configuration page |
printing and return the printer to the READY state.
Density sensor out of range alternates with
Clean density sensor
A density sensor out of range error was detected during a color calibration.
•The density sensor may be dirty. Inspect and clean the sensor. See “Cleaning the toner density sensor” in the service manual.
Data received
The printer has received and processed data and is waiting for a form feed.
•Load the appropriate media to continue the print job.
Diagnostics mode
The extended diagnostics power-up key sequence has been entered. Refer to the diagnostics procedures provided in the service manual.
•No action is required.
Drum error replace drum kit
An error has been detected with a component of the print drum kit.
•Replace the print drum kit.
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Control panel messages 9 |
Drum life low replace drum kit
Approximately 80% of the drum’s life has been consumed.
•Drum replacement will be required in the near future.
Drum life out replace drum kit
The imaging drum has reached the end of its expected life.
•Replace the print drum kit.
Duplexer error check duplexer
An error has occurred in the duplex-printing accessory.
•Verify that the duplex-printing accessory is correctly installed and plugged in.
EIO x initializing yyy alternates with
Do not power off
The EIO device in slot “x” is initializing. The yyy value will increment every 10 seconds during this process.
•No action is required.
EIO x not functional
The EIO slot specified does not have a card installed or is not functional.
•No action is required.
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Event log empty
SHOW EVENT LOG was selected from the Information menu, but the |
1 |
event log has no entries. |
• No action is required.
Fuser life low replace kit
Approximately 95% of the fuser’s life has been consumed.
•Fuser replacement will be required in the near future. Continue printing, or replace the fuser kit.
Fuser life out replace kit
The fuser has reached the end of its expected life.
•Replace the fuser kit.
Install drum kit
The drum kit is not installed or is incorrectly installed.
•Verify that the drum kit is correctly installed.
Install Tray 2
The printer cannot print until media is loaded into Tray 2. The paper path for Tray 3 passes through Tray 2.
•Insert Tray 2 into the printer so that printing from Tray 3 can begin or continue.
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Control panel messages 11 |
Memory full stored data lost
The printer has no available memory. The current job may not print correctly. Some downloaded fonts may have been deleted.
•Try printing simplified pages. If this does not resolve the problem, add printer memory.
Memory settings changed
The I/O buffering settings were changed by the printer because there is not enough memory available to use the previous settings.
•No action is required. However, adding printer memory can prevent this from occurring.
Memory shortage job cleared
The available memory was not enough to continue printing. The remainder of the job was canceled.
•Adding printer memory can prevent this from occurring.
Memory shortage page simplified
The printer’s adaptive data compression had to resort to lossy compression to fit raster graphics in the available memory. This has caused a data loss in the raster output.
•Reduce the complexity of the page to improve the print quality.
Note
Adding memory will not correct this problem.
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No job to cancel
CANCEL JOB was pressed but there is no active job or buffered data to |
1 |
cancel. The printer automatically returns to the READY state. |
• No action is required.
Page cannot print now alternates with
Retry when printing stops
An internal page has been requested while the printer is printing an incoming job. Interrupting the job to print the internal page would corrupt the job’s environment and potentially cause the job to finish printing incorrectly after the internal page is completed. Consequently, internal pages are not permitted to interrupt jobs and can only be printed when the printer is idle.
• Retry print job after printer has completed current job.
Page simplified
The printer’s adaptive data compression had to resort to lossy compression to fit raster graphics in the available memory. This has caused a data loss in the raster output.
•Reduce the complexity of the page to improve the print quality.
Note
Adding memory will not correct this problem.
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Control panel messages 13 |
Page too complex to print alternates with
Press Go to continue
The page could not be printed.
Note
Reducing the complexity of the page could allow it to print successfully. Adding memory will not correct this problem.
•Press GO to continue printing the current page (with noticeably poor results on this page).
•Press CANCEL JOB to terminate the entire job.
Press Go to print alternates with
Press Select to change toner
The top cover was opened and closed when the printer was not in the toner cartridge replacement mode.
•Press GO to resume printing or press SELECT to enter the toner replacement menu.
Printer language not available
The printer received a request for a new language (personality) that does not exist in the printer.
•No action is required.
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Reinstall transfer belt
This message occurs if you do not have the intermediate transfer belt installed in the printer or if the home positions (marks on the ITB) are 1 not detected by sensor PS5.
Note
The intermediate transfer belt must be rotating before PS5 is able to detect the “home position” marks on the ITB. Both the ITB and the imaging drum are driven by the drum motor (M4).
1Check SW1 for correct operation and make sure the cables are connected.
2Verify that the ITB is installed in the printer.
3If the ITB is installed and seated properly, verify that PS5 is not damaged. PS5 is located on the ITB assembly. If the sensor appears damaged, replace the entire ITB assembly.
4Clean PS5.
5Verify all wiring within the ITB drawer. Note the connection on the ITB assembly (located on the front, lower, left-hand corner of the assembly). When the drawer is closed the connector “mates” with a receptacle connector on the drawer. Verify that the connector and all wiring are in good condition.
6Verify that the drum motor (M4) is rotating both the imaging drum and the ITB. If necessary use a light felt marker and identify a spot (outside the imaging area) on the edge of the imaging drum. Turn on the printer, then open the drawer to see if the mark has moved.
7If the imaging drum is not rotating, verify that the imaging drum connector is firmly seated into the J204 connector of the developing PCB.
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Control panel messages 15 |
Remove paper top output bin
The top output bin holds 200 sheets of paper. Sensor PS9 along with its sensor flag detects the height of the output paper stack.
1Verify that PS9 moves freely and its movement is not blocked.
2Verify that PS9 is free of dust and debris (the printer’s top cover must be removed to access the sensor).
3Verify that all connectors are firmly seated. Refer to the wiring diagram in chapter 10.
Note
For more information, see the service manual for the printer.
Resetting memory
The printer is executing a memory reset. The printer returns to the READY state upon completion of this process.
•No action is required.
Resetting values finished
The color calibration density values have been reset to their default values.
•No action is required.
Select language
The language selection power-up key sequence has been entered. The printer will prompt the user to select a new control panel display language once it has completed its initialization process.
•Select a new language when prompted.
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Service mode
The service mode powerup key sequence has been entered. The |
1 |
printer will remain in service mode until GO is pressed. |
• Press GO to exit the service mode.
Toner CMYK low
The toner cartridge specified is low on toner.
•Printing will continue until a TONER OUT message appears. To change the toner cartridge now, press SELECT.
Toner CMYK low alternates with
Press Select to change toner
The toner cartridge specified is low on toner and must be replaced.
•Press SELECT to enter the toner replacement menu.
Toner CMYK out alternates with
Press Select to change toner
The toner cartridge specified is out of toner.
•If the TONER OUT setting in the Configuration menu is set to OVERRIDE, press GO to resume printing.
•Press SELECT to enter the toner replacement menu. Press GO to resume printing without changing the cartridge.
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Control panel messages 17 |
Toner position [color] = [state]
Indicates the current state of a particular toner cartridge. This message is displayed when SELECT is pressed while a TONER LOW/OUT message is displayed.
•If necessary, replace the specified toner cartridge.
Transfer kit low replace kit
The transfer kit is near the end of its expected life.
•Although printing can continue, the transfer kit should be replaced for optimum printer operation.
Transfer kit out replace kit
The transfer kit has reached the end of its expected life.
•Replace the transfer kit.
Tray x empty [type] [size]
The specified tray is empty but the current job does not require this tray to complete the job.
•No action is required. However, to avoid this message in the future, load the proper media type and size into the tray.
Tray x load [type] [size]
The specified media type and size need to be loaded into the requested tray.
•Load the specified media type and size into the requested tray. Press GO to override this request and cause the page to be printed on different media.
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Tray x size [size]
Media has been loaded into Tray 1. The most recently configured size |
1 |
will be displayed with an asterisk next to it. |
•Use VALUE+ and VALUE- to view all possible sizes.
•Press SELECT for the currently displayed size. Press GO to clear the message.
Tray x type [type]
Media has been loaded into Tray 1. The most recently configured type will be displayed with an asterisk next to it.
•Use VALUE+ and VALUE- to view all possible sizes.
•Press SELECT for the currently displayed type. Press GO to clear the message.
Waste toner full replace drum kit
Waste toner full sensor PS13 detects a waste toner full condition. Light receiver and light pipe arrangement along with a window in the drum assembly look for a waste fill condition. Verify that the sensors and light pipes are not blocked.
1Replace the drum kit.
2Check the sensor, and if it is defective, replace it.
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Control panel messages 19 |
Numerical messages
13.xx Paper jam
xx = Description:
0 = Jam in input feed area
1 = Jam in fusing area
2 = Jam in fusing area
3 = Jam in duplex reversing unit
4 = Jam in duplex feed unit
5 = Jam in duplex paper feed area
6 = Jam in duplex paper feed area
7 = Jam in paper feed area
8 = Door open jam
9 = Irregular paper jam in paper path 10 = Paper in the paper path is too short 11 = Paper in the paper path is too long
13.xx Paper jam alternates with
Check all rear door
Media is jammed in the rear paper path or rear duplexing area.
1Open the rear duplex cover (if installed) and remove any jammed media.
2Open the upper rear door and remove any jammed media.
13.xx Paper jam alternates with
Check middle front doors
Media is jammed in the transfer belt area or media is not picking.
•Open the middle front drawer and remove any jammed media.
•Watch the pick roller to ensure it is turning.
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13.xx Paper jam alternates with
Check front duplex drawer
Media is jammed in the front duplexing area. |
1 |
•Open the front duplex drawer and remove any jammed media.
13.1 Paper jam alternates with
Check in rear of drawer
A jam has occurred inside the middle front drawer area.
•Open the middle front drawer and carefully inspect for and remove any jammed media.
13.1 Paper jam open middle front drawer alternates with Check in rear of drawer
A jam has occurred inside the middle front drawer area. The jam may be located in the fuser area or between the transfer area and the fuser.
1Open the middle front drawer and carefully inspect for any media.
2Be sure to inspect the fusing area. You may need to access the fusing area through the rear door.
3Remove any jammed media.
20 Insufficient memory alternates with Press Go to continue
More data has been received from the computer than fits in the printer’s internal memory.
1To continue printing, press GO. Only the amount of data that fits in the printer’s internal memory is printed.
2To cancel the job, press CANCEL JOB.
3Add more memory to resolve the problem.
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Control panel messages 21 |
22 EIO x buffer overflow alternates with Press Go to continue
The EIO buffer for the EIO card in slot “x” has overflowed during a busy state.
•The current data in the print buffer will be lost.
•Press GO to resume printing and then resend the job.
22 Parallel IO buffer overflow alternates with Press Go to continue
This message indicates that the parallel buffer has overflowed.
•The current data in the print buffer will be lost.
•Press GO to resume printing and then resend the job.
40 EIO x data error alternates with Press Go to continue
A connection with the card in the specified slot has been broken.
1Check that all cables are connected to the EIO ports and that the EIO board is seated properly.
2If possible, print to another network printer to verify that the network is working properly.
Note
All data in the print buffer will be lost.
41.3 Unexpected paper size alternates with Check paper in Tray x
A tray is configured for a specific paper size, but the sheet loaded is a different size. This error often occurs when the printer is multifeeding.
•Load the tray with the requested size media.
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41.5 Unexpected paper type alternates with Check paper in Tray x
A tray is configured for a specific media type, but the printer detects that 1 a different media type is loaded. The most common cause for this error
is a paper jam at the registration plate (under the ITB) where the customer does not remove the paper. The engine tries to check the OHT sensor and receives an error.
1Verify that the correct media is loaded in the input tray and that the printer control panel is configured correctly.
2Clean the detection windows of OHT sensors 1 and 2.
49 Error xxxx cycle power
This message indicates that a critical firmware error has occurred. An invalid command or data was sent to the formatter causing the processor to stop. This is the last action taken by the processor. The most likely cause of this error is invalid data or a bad command sent to the printer. A poor quality parallel cable, connection, or homegrown application has been known to cause this error.
1Verify that all cables are connected.
2Turn the printer off and on to reset the printer.
3Cancel all print jobs then resend. Try to isolate any offending print job.
4If the formatter pan assembly or DC controller was removed, make sure the ribbon cable between the DC controller and the interconnect PCB is connected.
EN |
Control panel messages 23 |
50.x Fuser error
The fusing assembly contains two heating bulbs, two thermo-switches, and two thermistors. AC power is provided to the fusing assembly via the DC power supply, which is controlled by the DC controller PCB. The thermistors monitor the temperature of the fusing assembly and provide feedback to the DC controller PCB to regulate the fusing temperature. The two thermo-switches are wired in series with the fusing bulbs. They “open” if the temperature exceeds 240° C (464° F).
x = Description:
1 = Low temperature error
2= Fuser warm-up service
3= High fuser temperature
4= Faulty fuser
5= Fuser voltage mismatch (verify that you have NOT installed a 110V fuser in a 220V printer or vice-versa)
6= Fuser heater cutoff
7= Fuser motor malfunction (see recommended action for 50.7 Fuser error).
Note
A visual check to determine if the fusing assembly is functional can be made by defeating the rear door interlock switch. To do so, press in on the white plastic button above the left-rear corner of the fan while turning the printer on. If the fusing bulbs and thermoswitches are good, you should observe light from the lower fusing bulb as the printer warms up.
1Turn the printer off and on to reset the printer. If the error persists, try re-installing the fusing assembly. If the error continues to persist, proceed to step 2.
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