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Make/Model Information:

  • Brand:   Hewlett-packard
  • Models included:
    • Hp LaserJet M9040
    • Hp LaserJet M9050

File Information:

  • Type:   Factory Service Manual (FSM)
  • Language:   English (EN)
  • Number of pages:   586
  • File size:  ∼ 27.80  MB
  • File Format:   PDF only
  • SME Watermarks:   None
  • Password lock:   No
  • Edit/copy/modify:   Yes
  • SKU:   BMHP-1081

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Service Manual
HP LaserJet M9040/9050 MFP Series
Service Manual
Table of contents
1 Product basics
Product introduction
Product features
Product walkaround
Output devices
3,000-sheet stacker
3,000-sheet stapler/stacker
Paper handling features
Stapling information
Multifunction finisher
Paper handling features
Stapling information
Booklets
8-bin mailbox
2 Control panel
Use the control panel
Control-panel layout
Home screen
Buttons on the touchscreen
Control-panel help system
Use the Administration menu
Navigate the Administration menu
Information menu
Default Job Options menu
Default Options for Originals
Default Copy Options
Default Fax Options
Default E-mail Options
Default Send to Folder Options
Default Print Options
Time/Scheduling menu
Management menu
Initial Setup menu
ENWW iii
Networking and I/O
Fax Setup
E-mail Setup
Send Setup menu
Device Behavior menu
Print Quality menu
Troubleshooting menu
Resets menu
Service menu
3 Paper and print media
Understand paper and print media use
Supported paper and print media sizes
Custom paper sizes
Special paper or print media guidelines
Load paper and print media
Load Tray 1
Load Trays 2, 3, and 4
Configure trays
Configure a tray when loading media
Configure a tray by using the Supplies Status button on the touchscreen
Select the media by source, type, or size
Source
Type and Size
Select the output bin
Select an output location
Printing
Copying
4 Manage and maintain
Information pages
Embedded Web server
Open the embedded Web server by using a network connection
Embedded Web server sections
HP Easy Printer Care
Supported operating systems
Open the HP Easy Printer Care software
HP Easy Printer Care software sections
Use HP Web Jetadmin software
HP Printer Utility for Macintosh
Open the HP Printer Utility
Print a cleaning page
Print a configuration page
iv ENWW
View supplies status
Order supplies online and use other support features
Upload a file to the product
Update the firmware
Activate the two-sided printing (duplexing) mode
Lock or unlock storage devices
Save or print stored jobs
Configure trays
Change network settings
Open the embedded Web server
Set up e-mail alerts
Security features
Secure the embedded Web server
Secure Disk Erase
Data affected
Gain access to Secure Disk Erase
Additional Information
Security lock
Authentication
Lock the control-panel menus
Set the real-time clock
Clean the product
Print a cleaning page
Clean the product hardware
Clean the ADF delivery system
Configure alerts
Manage supplies
HP print cartridges
Non-HP print cartridges
Print cartridge authentication
HP fraud hotline
Print cartridge storage
Print cartridge life expectancy
Check the print cartridge life
Control panel
Embedded Web server
HP Easy Printer Care
HP Web Jetadmin
Printer maintenance kit
Manage memory
Determine memory requirements
Install memory
Verify memory installation
Economy settings
Sleep and wake
5 Theory of operation
Basic operation
Sequence of operation
Product start up sequence (turn on product)
Timing chart
Scanner subsystem
Mechanical structure
Motors and fans
Basic block diagram
Basic system configuration
Scanner unit systems
Scan mode
Power supply assembly
Sleep mode
Low-voltage power supply circuit
Protective functions
Scanner controller circuit
Flatbed operation
Flatbed document exposure control
Flatbed optical drive control
Flatbed optical unit operation
Flatbed document size detection
ADF operation
ADF document exposure control
ADF document feed control
ADF document size detection
ADF feeder sensors
ADF document skew detection
Scanned data flow
Copy processor
Scanning process control signals
Typical scanning process flow
Engine control system
DC controller PCA
High-voltage power supply circuit
Low-voltage power supply
Fuser control circuit
Formatter system
Formatter hardware
Laser/scanner system
Image formation system
vi ENWW
The image formation process
Print cartridge
Print cartridge design
No-shake toner
Cartridge memory
Toner seal
Toner level detection
Pickup and feed system
Media-size detection
Media-level detection
Multifeed prevention
Transparency media detection
Fuser-wrapping jam detection
Jam detection
Tray 1
Tray 1 driver PCA
Tray 1 power supply
Tray 1 sequence of operation
Tray 1 pickup and feed
Tray 1 jam detection
Tray 4
Tray 4 driver PCA
Tray 4 power supply
Tray 4 sequence of operation
Tray 4 pickup and feed
Tray 4 media level and media size detection
Tray 4 jam detection
6 Removal and replacement
Removal and replacement strategy
Repair notices
Electrostatic discharge
Required tools
Product orientation
Front and right side orientation
Back and left side orientation
Scanner assembly covers
Control panel
Reinstall the control panel
ADF feeder cover
Reinstall the ADF feeder cover
ADF feeder cover handle
ADF back cover
ENWW vii
ADF front cover
Lower delivery roller cover
Reinstall the delivery roller cover
White board cover
Copy processor/connect board
Reinstall the copy processor/connect board
Flatbed rail cover
Flatbed back cover
Flatbed right cover
Reinstall the flatbed right cover
Flatbed left cover
Flatbed upper front cover
Flatbed lower front cover
ADF base cover assembly
Reinstall the ADF base cover assembly
Scanner glass
Reinstall the scanner glass
Scan engine internal assemblies
ADF and flatbed internal assemblies
ADF main assembly
Reinstall the ADF main assembly
ADF optical assembly
Reinstall the ADF optical assembly
ADF shading filter
Flatbed optical unit
Reinstall the flatbed optical unit
Switch and solenoids
ADF feeder cover detection switch
Weight solenoid
Shutter solenoid
Motors and fans
Pickup motor
Reinstall the pickup motor
Delivery motor
Reinstall
Flatbed motor
Reinstall the flatbed motor
Power supply assembly
Reinstall power supply assembly
ADF fan assembly
Reinstall the ADF fan assembly
Flatbed fan assembly
Rollers and belts
Pickup roller (D roller)
viii ENWW
Pickup roller assembly
Reinstall the pickup roller assembly
Feed roller assembly
Lower registration roller assembly
Reinstall the lower registration assembly
Lower delivery roller
Reinstall the lower delivery roller
Upper delivery roller assembly
Reinstall the upper delivery roller assembly
Separation belt assembly
Reinstall the separation belt assembly
Separation belts
Reinstall the separation belts
ADF intermediate PCA
ADF width detection sensor assembly
Reinstall the ADF width detection sensor assembly
Flatbed intermediate PCA
Scanner controller board
Intermediate PCA
Scan engine
Reinstall the scan engine
Laser/scanner assembly
Delivery fan assembly
Delivery motor
Print engine covers
Front cover
Right door
Right lower cover
Left upper cover
Reinstall the left upper cover
Left door and diverter
Left back cover
Back cover
Right and left rail covers
Front assemblies
Cartridge release lever
Print cartridge
Reinstall the print cartridge
Transfer-roller assembly
Reinstall the transfer-roller assembly
Tray 2 and Tray 3 (interchangeable)
Rollers (pickup, feed, or separation)
Fuser-jam-removal knob
ENWW ix
Reinstall the fuser-jam-removal knob
Registration-jam-removal knob
Reinstall the registration-jam-removal knob
Right assemblies
Tray 1
Paper-input unit (PIU)
Reinstall the paper-input unit
Registration assembly
Reinstall the registration assembly
Transfer-guide assembly
Reinstall the transfer-guide assembly
Left assemblies
Duplexer
Fuser assembly
Back assemblies
Formatter
Low-voltage power supply
High-voltage power supply
DC controller
Toner-sensor contact assembly
Reinstall the toner-sensor contact assembly
Drum motor
Feed-drive assembly
Reinstall the feed-drive assembly
Power-supply fan (fan 1)
Cartridge fan (fan 5)
Reinstall the cartridge fan
Controller fan (fan 2)
Jetlink connector
Duplexer connector holder assembly
Fuser delivery-drive assembly
Reinstall the fuser delivery assembly
Tray 4
Orientation
Tray 4 left side cover
Reinstall the Tray 4 left side cover
Tray 4 right side cover
Reinstall the Tray 4 right side cover
Tray 4 back covers
Tray 4 center back cover
Tray 4 right back cover
Tray 4 left back cover
Tray 4
Tray 4 rollers (pickup, feed, and separation)
Reinstall the Tray 4 rollers
Tray 4 registration assembly
Tray 4 drive motor
Tray 4 drive assembly
Tray 4 controller board
Paper-size detection switch PCA
Reinstall the paper-size switch PCA
Tray 4 power supply
Tray 4 pickup assembly
Tray 4 paper-connecting unit
7 Solve problems
Troubleshooting process
Preliminary operating checks
Installation environment
Media checks
Scanner and ADF checks
General troubleshooting information
Abnormal noises are evident, such as grinding or chattering when the main motor is
turned on
Media does not feed from Tray X when printing from a software program; the paper-
path test is successful
Media does not print from Tray 4
The product stops printing and hangs on certain jobs
Envelopes are wrinkling
Fusing is poor
The product feeds from an incorrect tray when different media is selected for the first
page of the job
Power-on checks
Malfunction troubleshooting
Troubleshooting by using control-panel messages
Event log page
Print the event log
Interpret the event log
Sample event log
View the event log
Control-panel error messages
User- and service-level diagnostics
Copy processor LEDs
Troubleshooting menu
Paper-path test
Print a paper-path test
Service test
Perform a service test
ENWW xi
Service-level diagnostics
Engine test
Service menu
Other diagnostics
Boot-up key sequences
Low-level boot-up key sequence for selecting a language, performing a cold
reset, and enabling and disabling embedded LAN
Medium-level boot-up key sequence for initializing disks
High-level boot-up key sequence for NVRAM initialization, manufacturing,
and skipping disk-load and calibration
Drum rotation functional check
Calibrations
Control panel touchscreen calibration
Simplified scanner and ADF calibration
ADF calibrations
Left side front calibration
Left side back calibration
Leading edge front calibration
Leading edge back calibration
ADF plain scaling calibration
ADF heavy scaling calibration
Glass calibrations
Left side glass calibration
Leading edge glass calibration
Glass scaling calibration
Plain motor speed calibration
Measurement and adjustment
ADF unit height adjustment
ADF skew adjustment
ADF width sensor adjustment
Weight solenoid stroke adjustment
Tray 4 diagnostics
Motor test
Standalone running test
Sensor test
Light-pattern interpretation
Clear jams
Jam locations
ADF jams
Clear jams from the duplexer
Clear jams from the input-tray areas
Clear jams from the output areas
Solve repeated jams
Image-formation troubleshooting
xii ENWW
Print image defects
Print/stop test
Economode
Copy-image defects
Scanner controller PCA
Connector locations
Electrical structure
Wiring diagrams
Image-defect tables
Repeating defect ruler
Media troubleshooting
Determine the problem source
Isolate the paper path
Try using the straightest paper path
Check the duplexing path
Isolate the source of a jam
Determine the location of a jam
Determine whether the product is experiencing misfeeds or multifeed
Isolate a media brand
Isolate a media type
Communication troubleshooting
Communications check
EIO troubleshooting
Jetdirect configuration
Embedded LAN troubleshooting
Error codes
LAN diagnostics
Wiring diagrams
8 Parts and diagrams
Order parts, accessories, and supplies
Supplies part numbers
Consumables, supplies, accessories, FRUs, and documents
Common hardware
Illustrations and parts lists
Scanner assembly
Scanner engine covers and panels
Print engine covers and panels
Flatbed scanner assembly
Flatbed optical assembly
ADF scanner assembly
ADF paper pickup assembly
ENWW xiii
ADF main assembly
ADF optical assembly
Scanner engine PCAs
Left door and diverter
Right cover assembly
Print engine internal components
Drum feed drive assembly
Fuser delivery drive assembly
Cartridge lifter assembly
500-sheet trays (Tray 2 and Tray 3)
Paper input unit
Registration assembly
Transfer roller assembly
Delivery assembly
PCA locations
Tray 4 main body
Tray 4 drive assembly
Tray 4 PCA location
Tray 1 assembly
Alphabetical parts list
Numerical parts list
Appendix A Service and support
Hewlett-Packard limited warranty statement
Customer self repair warranty service
Print cartridge limited warranty statement
HP Customer Care
Online Services
Telephone support
Software utilities, drivers, and electronic information
HP direct ordering for accessories or supplies
HP service information
HP service agreements
HP Easy Printer Care
HP support and information for Macintosh computers
Appendix B Specifications
Physical specifications
Electrical specifications
Acoustic emissions
Operating environment
Appendix C Regulatory information
xiv ENWW
FCC regulations
Declaration of conformity
Certificate of volatility
Types of memory
Volatile memory
Non-volatile memory
Hard-disk-drive memory
Safety statements
Laser safety
Canadian DOC regulations
VCCI statement (Japan)
Power cord statement (Japan)
EMI statement (Korea)
EMI statement (Taiwan)
Laser statement for Finland
Substances table (China)
ENWW xv
Product introduction
Figure 1-1 HP LaserJet M9040 MFP and HP LaserJet M9050 MFP
The HP LaserJet M9040 MFP and HP LaserJet M9050 MFP come standard with the following items:
? 100-sheet multipurpose input tray (Tray 1)
? Two 500-sheet input trays
? One 2,000-sheet input tray
? Automatic document feeder (ADF)
? HP Jetdirect embedded print server for connecting to a 10/100/1000Base-TX network (Gigabit
support)
? 384 megabytes (MB) of random access memory (RAM)
? Duplexer
? Hard drive
? Output device
2 Chapter 1 Product basics ENWW
Problem Cause Solution
Curl or wave The media fails to meet product
specifications or is stored improperly.
? Print a few more pages to see if the
problem persists.
? Turn the stack over in the tray, or
rotate the stack 180.
? Use media that meets product
specifications.
The operating environment fails to meet
product specifications.
Place the product in an environment that
meets product specifications.
The product is sending the media to the
wrong bin.
Set the product to use a different bin
(face up or face down).
The fuser is configured with the wrong
setting
Change the fuser mode setting in the
control panel Print Quality menu, or
select another media type in the print
driver.
Contamination on back Parts of the product are contaminated.
For example: tray separation roller, feed
roller, transfer charging roller, fuser, or
print cartridge.
? Print about 10 pages to see if the
problem goes away.
? Print a cleaning page.
? Identify and clean the contaminated
? Check for toner leaks.
The media fails to meet product
specifications or is stored improperly.
Print a few more pages to see if the
problem persists.
Turn the stack over in the tray, or rotate
the stack 180
Use media that meets product
specifications.
The product requires a preventative
maintenance kit.
If the product has printed about 350,000
pages, install a preventative
maintenance kit.
Dropouts The media is too smooth. Check the media type and quality.
The operating environment fails to meet
product specifications.
Place the product in an environment that
meets product specifications.
The toner density setting is incorrect. Adjust the toner density setting in the
control panel Print Quality menu (turn off
Economode).
The fuser is configured with the wrong
setting
Change the fuser mode setting in the
control panel Print Quality menu, or
select another media type in the print
driver.
The product requires a preventative
maintenance kit.
If the product has printed about 350,000
pages, install a preventative
maintenance kit.
Bubbles The drum ground path is missing. Check the drum ground spring, and
reconnect it.
Replace the high voltage power supply.
Table 7-13 Image defects (continued)
ENWW Image-formation troubleshooting 385
Problem Cause Solution
NOTE: When the ground is interrupted,
the drum cannot discharge. This causes
the drum to repel the toner leaving the
bubble print pattern.
Gray background The media fails to meet product
specifications or is stored improperly.
Print a few more pages to see if the
problem persists.
Turn the stack over in the tray, or rotate
the stack 180
Use media that meets product
specifications.
The operating environment fails to meet
product specifications.
Place the product in an environment that
meets product specifications.
The toner density setting is incorrect. Adjust the toner density setting in the
control panel Print Quality menu (turn off
Economode).
The print cartridge is faulty. Replace the print cartridge.
Horizontal black lines
See the Repeating defect ruler.
The print cartridge is defective. Replace the print cartridge.
The laser/scanner assembly is defective. Reseat the connectors on the laser/
scanner and the DC controller.
Replace the laser/scanner if necessary.
The DC controller is defective. Reseat the connectors on the DC
controller and the laser/scanner
assembly.
Replace the DC controller if necessary.
Horizontal smudges
See the Repeating defect ruler.
The paper path is contaminated or
damaged.
Replace the print cartridge if necessary.
Check the fuser, and replace it if
necessary.
Horizontal white lines The paper path is contaminated or
damaged.
Replace the print cartridge if necessary.
Check the fuser, and replace it if
necessary.
Replace the laser/scanner assembly and
the DC controller if necessary.
Table 7-13 Image defects (continued)
386 Chapter 7 Solve problems ENWW
Communication troubleshooting
Communications check
NOTE: Communication problems are normally the customer’s responsibility. Time spent attempting
to resolve these problems might not be covered by the Hewlett-Packard warranty. Refer the customer
to the network administrator for assistance in troubleshooting network problems.
EIO troubleshooting
The Jetdirect configuration page shown in figure 125 on page 230 contains valuable information about
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. If an EIO accessory
is installed, the Jetdirect configuration page also prints.
See the HP Jetdirect Network Interface Configuration Guide for detailed explanations of network issues. Jetdirect configuration
? If the EIO Jetdirect print server has successfully turned on and completed its internal diagnostics,
the I/O card ready message will display. If communication is lost, an I/O not ready message
displays followed by a two digit error code. Consult the HP Jetdirect Network Interface
Configuration Guide for further details and recommended action.
? The “Network Statistics” column indicates the status of network activity. Bad packets, framing
errors, un-sendable packets, and collisions should be minimal. If a high percentage (greater than
1%) of these occur, contact the network administrator. All of the statistics are set to zero when the
product is powered off.
? A “Novell Status” block should state the Novell printer server name to which the product is
connected. If the Node Name reads “NPIxxxxxx” (xxxxxx = last six digits of the EIO 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 product with this default address. The error message ARP DUPLICATE IP ADDRESS might
appear in this block. This is also an acceptable error code if the TCP/IP protocol is not being used.
Please check with the network administrator to determine the correct IP address for the product.
Embedded LAN troubleshooting
Although networking is integrated, the embedded LAN has additional features to assist in
troubleshooting. These include the following features:
? The ability to turn on and turn off the embedded networking.
? An internal diagnostic to check the networking hardware.
? The ability to initiate communication from the product to other network devices to check
communication paths.
? The ability to upgrade the embedded LAN separately from the product firmware.
394 Chapter 7 Solve problems ENWW


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