M375 M475
Page
Page
Trademark Credits
Copyright and License
Conventions used in this guide
Conventions used in this guide
Table of contents
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Solve problems 111
135
Load Tray 1 Type SIZE, Press OK to use available media
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218
Parts and diagrams 245
279
289
291
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Index 313
List of tables
Xviii
List of figures
35 Remove the rear door simplex product 1
74 Reinstall the left cover 1
137 Remove the fuser 1 101
Rollers 124
Xxiv
Removal and replacement
Removal and replacement strategy
Removal and replacement strategy
Introduction
Required tools
Electrostatic discharge
Types of screws
Common fasteners
Description Size Part Number
Service approach
Before performing service
After performing service
Test 3 fax-quality test fax models only
Post-service tests
Test 1 print-quality test
Test 2 copy-quality test
2Parts removal order 1
Parts removal order
3Parts removal order 2 Removal and replacement
Removal and replacement procedures
Rollers and pads
Transfer roller
Pickup roller Tray 2 and Tray
4Remove the pickup roller 1
5Remove the pickup roller 2 Removal and replacement
6Remove the pickup roller 1
Separation roller Trays 2 or
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9Reinstall the separation roller
Reinstall the separation roller
Document feeder pickup roller assembly
Pickup roller and separation pad Tray
13Remove the Tray 1 pickup roller 2 Removal and replacement
15Remove the Tray 1 separation pad
Print-cartridge drawer
Main assemblies
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Dimm cover
Right cover
22Remove the right cover 3 Removal and replacement
24Remove the document feeder input tray 2
Document feeder input tray
25Remove the scanner assembly 1 Remove four screws callout
Scanner assembly
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Right-front cover and power button
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Rear-upper cover duplex product
30Remove the rear-upper cover 2 Removal and replacement
32Remove the feed assembly 2
Paper-feed guide assembly
Rear-door stopper and link caps simplex product
36Remove the rear door simplex product 2
Rear door simplex product
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40Remove the rear door duplex product 2
Rear door duplex product
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Rear cover and feed guide simplex product
Before proceeding, remove the following components
Remove the rear cover and feed guide simplex product
Remove three screws callout
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Rear-lower cover and rear-door links duplex product
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Remove the rear-door rib assembly duplex product
Rear-door rib assembly duplex product
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58Replace the link guide simplex products
Link guide
Control panel and right-arm mount
63Reinstall the control panel and right-arm mount 1
Reinstall the control panel and right-arm mount
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Remove the upper-cover assembly
Upper-cover assembly
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69Reinstall the upper-cover assembly 2
Reinstall the upper-cover assembly
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Remove the left cover
Left cover
73Remove the left cover 3 Removal and replacement
75Reinstall the left cover 2
Reinstall the left cover
Remove the front-door assembly
Front-door assembly
78Remove the front-door assembly 3
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Push the black-plastic arm into the product
Reinstall the front-door assembly
85Remove the front-door assembly 10
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89Remove the ITB 2
Intermediate transfer belt ITB
91Remove the ITB 4 Removal and replacement
93Remove the ITB 6
Reinstall the ITB
Diagnostics
95Remove motor M1 and motor M2 1
Drum motor M1 and developer motor M2
96Remove motor M1 and motor M2 2 Removal and replacement
97Remove motor M1 and motor M2 3
Release one tab callout
100Remove motor M1 and motor M2 6
Reinstall the drum motor M1 and developer motor M2
Intermediate PCA
Formatter PCA and fax PCA
Replacing the formatter PCA before the DC controller PCA
Remove the formatter PCA and fax PCA
104Remove the formatter 1 of 4 base model
106Remove the formatter 3 of 4 base model
108Remove the wirelss PCA 1 Remove the wireless PCA callout
Wireless PCA
DC controller PCA
Replacing the DC controller PCA before the formatter PCA
Before you proceed, remove the following components
110Remove the DC controller PCA 1
Remove the DC controller PCA
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Remove the fuser-motor assembly
Fuser-motor assembly
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Reinstall the fuser-motor assembly
117Remove the fuser-motor assembly 6
Remove the high-voltage power-supply PCA
High-voltage power-supply PCA
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Remove the color-misregistration sensor assembly
Color-misregistration sensor assembly
126Remove the color-misregistration sensor assembly PCA 3
Reinstall the color-misregistration sensor assembly
127Remove the color-misregistration sensor assembly PCA 4
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Fan FM1
131Remove the fan FM1 2
Remove the USB PCA
USB PCA fax/memory-card models
Remove the duplex-reverse drive assembly
Duplex-reverse drive assembly
Release the wire harnesses from the retainer callout
136Remove the duplex-reverse drive assembly 4
Fuser
137Remove the fuser 1
Remove the fuser
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141Remove the fuser 5
142Remove the fuser 6
144Remove the fuser 8
145Reinstall the fuser Removal and replacement
Reinstall the fuser
Remove the paper-delivery assembly
Paper-delivery assembly
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149Remove the paper-delivery assembly 4
Tray cassettes and optional Tray 3 assembly
Solve problems
Solve problems checklist
Print a menu map
Menu map
Troubleshooting process
Pretroubleshooting checklist
General topic Questions
Power-on checks
Troubleshooting tools
Component diagnostics
LED diagnostics
Test the control-panel buttons
Component tests
Control-panel tests
Test the control-panel display
Plug/jack locations
Diagrams
Location of connectors
Connector Board
DC controller PCA
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Location of major components
Major components
1Major components
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2Solenoid, sensors, and motors
Motors and fans
Item Description
Rollers
PCAs
PCAs
5Optional 250-sheet cassette
Optional 250-sheet cassette
General timing diagram
General circuit diagram
129
Asic diagram
HVT / Toneremp
Driver PCA1-1
Environment Sensor
FSR diagram
Diagram
Internal print quality test pages
Print quality troubleshooting
Print the Configuration
Service
Print the cleaning
Print-quality troubleshooting tools
Clean the paper path
Print the Service
Calibrate the product from the control panel
Setup Menu
Control panel menus
Calibrate the product
Menu item Description
HP Web Services menu
Reports menu
Menu item Sub-menu item Description
Quick Forms menu
Menu item Sub-menu item Description
Fax Setup menu
Menu item Sub-menu item
Private Receive Off
System Setup menu
Bottom on
Adjust Tray X1 Shift
Use the Y Shift setting to center the image from top to
Side on the first side of a two-sided
USB Flash Drive
Disable Fax
Off Supply Settings Black Cartridge Very Low Setting Prompt
Product Security
Yellow
Color Cartridges Very Low Setting Stop
Print Black
Low Threshold Cyan Enter percentage Magenta
Dark Color Copy
Store Usage Data On Supply
Not on Supply
Courier Font Regular
Service menu
Restore
Defaults HP Smart
Install Off
Network Setup menu
ID Copy
Function specific menus
Copy menu
Sets the product so that it communicates only with Web
Specifies the paper size and type
Fax menu
Jobs
Displays pending fax jobs,
Scan menu
Opens the Fax Setup menu
Control panel messages
10.100X Supply Memory Error
Interpret control panel messages
Control panel message types
Error, Turn off then on
Fuser Error
Scanner Error
Fan Error, Turn off then on
Error Turn off then on
Black Cartridge Low
Black Very Low
Canceled scan. Clear document
Canceled send. Clear document
Black in wrong position
Cyan Very Low
Communication error
Cyan Cartridge Low
Cyan in wrong position
Document feeder jam. Clear and reload
Device error, press OK
Device is busy. Try again later
Document feeder door is open
Door open
Engine Communication Error
Engine error. Press OK to continue
Document feeder mispick. Reload
Fax is busy. Canceled send
Fax receive error
Fax is busy. Redial pending
Fax storage is full. Canceling the fax receive
Fax Send error
Fit to Page on flatbed only
Fax storage is full. Canceling the fax send
Genuine HP supply installed
Install color cartridge
Jam in Tray 1, Clear jam and then press OK
Invalid driver Press OK
Invalid entry
Jam in area, Open door and clear jam
Magenta in wrong position
Load Tray 1, Plain Size / Cleaning mode, OK to start
Load tray X Press OK for available media
Magenta Cartridge Low
Memory is low. Try again later
Manual Duplex Load Tray 1, Press OK
Manual feed Size TYPE, Press OK to use available media
Memory is low. Press OK
No dial tone
No fax answer. Canceled send
Memory low Only 1 copy made. Press OK to continue
Misprint, Press OK
No fax detected
No fax answer. Redial pending
Remove shipping locks from cartridges
Print failure, press OK. If error repeats, turn off then on
Scanner error #, Turn off then on
Remove shipping lock from color cartridge
Unexpected size in tray # Load size Press OK
Scanning error Cannot connect
Settings cleared
Scanner reserved for PC scan
Used supplies in use
Used color installed, to accept press OK
Unsupported color Press OK to continue
Used color in use
Event-log messages
Yellow in wrong position
Yellow Very Low
Event code Description
Print the event log
Event log messages
7Event-log messages
Troubleshooting tools 177
Description Solution
Event-log messages
Event-log-only messages
8Event-log-only messages
Event code Description Solution
Clear jams
Common causes of jams
Jam locations
Clear jams from the document feeder
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Clear jams in Tray
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Clear jams in Tray
Clear jams in the fuser area
Clear jams in the output bin
Clear jams in the duplexer duplexing models only
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Solve paper-handling problems
Product picks up multiple sheets of paper
Product does not pick up paper
Solve image-quality problems
Problem Cause
Print quality examples
AaBbCc
Problem Cause Solution
Severity of the defect
Continue Black
Color image defects
AaBbCc
Clean the paper path from the product control panel
Clean the product
Clean the pickup and separation rollers
Clean the paper path
Clean the scanner glass strip and platen
Clean the document feeder pickup rollers and separation pad
Clean the touch screen
Factors affecting print performance
Solve performance problems
Print speeds
Product does not print
Product does not print or it prints slowly
Product prints slowly
Computer is using the incorrect IP address for the product
Solve product connectivity problems
Solve direct-connect problems
Solve network problems
Solve wireless network problems
Computer or workstation might be set up incorrectly
Computer is unable to communicate with the product
Wireless connectivity checklist
Cannot connect more computers to the wireless product
Wireless network is not functioning
Network does not appear in the wireless networks list
Service menu settings
Service mode functions
Service menu
Secondary service menu
Scan Calibration Calibrate
Open the secondary service menu
Secondary service menu structure
9Secondary service menu
Product resets
Restore the factory-set defaults
Nvram initialization
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Fax troubleshooting checklist
Solve fax problems
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Fax is busy. Canceled send
Fax error messages
Communication error
Document feeder door is open. Canceled fax
Fax is busy. Redial pending
Fax receive error
Fax storage is full. Canceling the fax receive
Fax Send error
Fax storage is full. Canceling the fax send
No fax answer. Canceled send
No dial tone
No fax detected
No fax answer. Redial pending
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View and interpret fax error codes
Troubleshoot fax codes and trace reports
Code number
Fax trace report
Fax logs and reports
Print individual fax reports
Print all fax reports
Change error correction and fax speed
Set the fax error report
Set the fax-error-correction mode
Change the fax speed
Solve problems sending faxes
An error message displays on the control panel
Communication error. message displays
Open the Error Correction menu
No fax answer. message displays
Fax is busy. message displays
Fax storage is full. message displays
Document feeder paper jam
Unable to use fax functions from the control panel
Faxes can be received, but not sent
Unable to use group dials
Unable to use speed dials
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An answering machine is connected to the product
Solve problems receiving faxes
Fax does not respond
Fax has a dedicated phone line
Answer Mode setting is set to the Manual setting
Telephone handset is connected to the product
Voice mail is available on the fax line
Product uses a fax over IP or VoIP phone service
Product is connected to a DSL phone service
No fax detected. message displays
Open the Advanced Setup menu Open the Fax Resolution menu
Sender receives a busy signal
Fax is received but does not print
Cannot send or receive a fax on a PBX line
Faxes are sending slowly
Solve general fax problems
Fax cuts off or prints on two pages
Fax quality is poor
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Product updates
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Parts and diagrams
Order parts by authorized service providers
Whole unit replacement
Orderable parts
5Related documentation and software
Related documentation and software
Supplies and accessories
Service parts
Part number Cartridge number Description
How to use the parts lists and diagrams
Scanner and document feeder main assemblies
Description Part number Qty
Scanner and document feeder main assemblies
Covers
2External panels and covers Parts and diagrams
Covers 1,2
Internal assemblies 1
Internal assemblies
8Internal assemblies 1
4Internal assemblies 2
Internal assemblies 2
9Internal assemblies 2
5Internal assemblies 3
Internal components 3
10Internal assemblies 3
A03
Internal assemblies 4
11Internal assemblies 4
7Internal assemblies 5
Internal assemblies 5
12Internal assemblies 5
8Internal assemblies simplex models
Internal assemblies simplex models
13Internal assemblies simplex models
9Internal assemblies duplex models
Internal assemblies duplex models
Description Part number
14Internal assemblies duplex models
10 PCAs
PCAs
PCAs
Sheet paper feeder optional Tray
Input devices
16250-sheet paper feeder optional Tray
17Alphabetical parts list
Alphabetical parts list
Internal assemblies 5
Internal assemblies 4
Paper pickup assembly RM1-8045-000
18Numerical parts list
Numerical parts list
RL1-3053-000 Motor, developer DC M1
RM1-8051-000 Paper-pickup guide assembly duplex
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Service and support
HP Product Duration of Limited Warranty
Hewlett-Packard limited warranty statement
Hewlett-Packard limited warranty statement
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Data stored on the print cartridge
End User License Agreement
Transfer
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OpenSSL
LJColorMFPM475
Customer support
Product specifications
Product Height Depth Width Weight
Physical specifications
Table B-1Physical specifications
Table B-2Environmental specifications1
Regulatory information
Protecting the environment
Power consumption
FCC regulations
Environmental product stewardship program
HP LaserJet print supplies
Toner consumption
Paper use
Plastics
Shipping Residents of Alaska and Hawaii
Non-U.S. returns
Multiple returns more than one cartridge
Single returns
Material restrictions
Paper
Chemical substances Material Safety Data Sheet Msds
For more information
Declaration of conformity
Manufacturers Name Manufacturers Address
Supplementary Information
Boise, Idaho USA
October
For regulatory topics only
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Declaration of conformity wireless models
Non-volatile memory
Certificate of volatility
Types of memory
Volatile memory
Power cord statement Japan
Safety statements
Laser safety
Vcci statement Japan Power cord instructions
Luokan 1 laserlaite
EMC statement Korea Laser statement for Finland
Restriction on Hazardous Substances statement Ukraine
GS statement Germany
Additional FCC statement for telecom products US
Additional statements for telecom fax products
EU Statement for Telecom Operation
New Zealand Telecom Statements
Industry Canada CS-03 requirements
Telephone Consumer Protection Act US
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Additional statements for wireless products
Korean statement
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Index
Symbols/Numerics 2ndary service menu
Msds
Jams
USB
Control-panel tests 117 Curled media Demo 116 Diagrams 121
288 Macintosh customer support Material Safety Data Sheet
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CE863-90966* *CE863-90966