HP LaserJet MFP M433 M436 M437 M438 M439 M440 M442 M443 M42523 M42525 M42623 M42625 Service Manual

Service Manual HP LaserJet MFP M433 M436 M437 M438 M439 M440 M442 M443 M42523 M42525 M42623 M42625;
This manual is in the PDF format and have detailed Diagrams, pictures and full procedures to diagnose and repair your HP.
You can print, zoom or read any diagram, picture or page from this manual. Every chapter on this manual is fully detailed and contain all the simulation codes, trouble codes, maintenance procedures, reset procedures, diagnose procedures of HP photocopier.
To see what contain, please read table of contents:

1. PRODUCT SPECS AND FEATURES
Product Overview
Specifications (HP LaserJet MFP M433/M436)
General Specifications (M433/M436)
Print specifications (M433/M436)
Controller and software specification (M433/M436)
Scan specification (M433/M436)
Copy specification (M433/M436)
Paper handling specification (M433/M436)
Supplies (M433/M436)
Maintenance parts (M433/M436)
Optional accessories (M433/M436)
Specifications (HP LaserJet MFP M437/M438/M439/M440/M442/M443/M42523/M42525/M42623/M42625)
General Specifications (HP LaserJet MFP M437/M438/M439/M440/M442/M443/M42523/M42525/M42623/M42625)
Print specifications (HP LaserJet MFP M437/M438/M439/M440/M442/M443/M42523/M42525/M42623/M42625)
Controller and software specification (HP LaserJet MFP M437/M438/M439/M440/M442/M443/M42523/M42525/M42623/M42625)
Scan specification (HP LaserJet MFP M437/M438/M439/M440/M442/M443/M42523/M42525/M42623/M42625)
Copy specification (HP LaserJet MFP M437/M438/M439/M440/M442/M443/M42523/M42525/M42623/M42625)
Paper handling specification (HP LaserJet MFP M437/M438/M439/M440/M442/M443/M42523/M42525/M42623/M42625)
Supplies (HP LaserJet MFP M437/M438/M439/M440/M442/M443/M42523/M42525/M42623/M42625)
Dynamic security
Maintenance parts (HP LaserJet MFP M437/M438/M439/M440/M442/M443/M42523/M42525/M42623/M42625)
Optional accessories (HP LaserJet MFP M437/M438/M439/M440/M442/M443/M42523/M42525/M42623/M42625)
System configuration
Feeding system
Feeding system overview
Main components and functions
Cassette
Pickup roller and friction pad
Registration roller
MPF (Multi-Purpose Feeder) unit
Image Creation
Printing process overview
Imaging unit
Imaging unit overview
Drum drive
Developer unit
Fuser unit
Fuser unit overview
Fuser duplex exit drive
Fuser unit temperature control
Laser Scanning unit (LSU)
LSU overview
Laser scanning optical path
Laser synchronizing detectors
Drive system
Drive motors
Main drive unit (OPC_DEVE_REGI_MP_pickup)
Fuser duplex exit drive
Toner cartridge drive
Scanner System
Scanner system overview
Scanning system components
Document feeder
Document feeder overview
Electrical parts location
Document feeder drive system
Overview
Document feeder original drive assembly
Document feeder registration drive assembly
Document feeder feed drive assembly
Document feeder exit drive assembly
Original return drive
Hardware configuration
Overview
Circuit Board Locations
Formatter (Main) board block diagram
Formatter (Main) board connectors
OPE board
SMPS (LVPS) board (HP LaserJet MFP M433a Printer only)
SMPS (LVPS) board
HVPS board
BLU PBA (back light unit)
Document feeder board
Tray 3 accessory board
Sensor location

2. REMOVAL AND REPLACEMENT
HP service and support
Additional service and support for channel partners
Additional service and support for HP internal personnel
Removal and replacement strategy
Electrostatic discharge
Required tools
Types of screws
Service approach
Before performing service
Releasing Plastic Latches
After performing service
Post-service test
Print-quality test
Removal: Toner cartridge
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Toner cartridge
Removal: Transfer roller
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Transfer roller
Removal: Fuser unit
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Fuser unit
Removal: Imaging unit (drum unit and developer)
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Imaging unit (drum unit and developer)
Removal: Pickup roller and friction pad
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Pickup roller and friction pad
Removal: MP pickup roller and friction pad
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: MP pickup roller and friction pad
Removal: Document feeder pickup roller assembly
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Document feeder pickup roller assembly
Removal: Document feeder friction pad
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Document feeder friction pad
Removal: Rear cover
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Rear cover
Removal: Front cover (M433/M436)
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Front cover (M433/M436)
Removal: Front cover (M437/M438/M439/M440/M442/M443/M42523/M42525/M42623/M42625)
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Front cover (M437/M438/M439/M440/M442/M443/M42523/M42525/M42623/M42625)
Removal: Left cover
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Left cover
Removal: Formatter board
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Formatter board
Removal: SMPS (LVPS) board
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: SMPS (LVPS) board
Removal: Front cover open sensor
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Front cover open sensor
Removal: Side unit
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Side unit
Removal: Side cover-open sensor
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Side cover-open sensor
Removal: Platen cover (a/n/dn models only)
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Platen cover (a/n/dn models only)
Removal: Document feeder unit (optional)
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Document feeder unit (optional)
Removal: Document feeder cover
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Document feeder cover
Removal: Document feeder open cover
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Document feeder open cover
Removal: Document feeder stacker
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Document feeder stacker
Removal: Document feeder board
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Document feeder board
Removal: Document feeder registration-cover-detect sensor
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Document feeder registration-cover-detect sensor
Removal: Document feeder motor solenoid clutch
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Document feeder motor solenoid clutch
Removal: Document feeder exit idle sensor
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Document feeder exit idle sensor
Removal: Document feeder exit sensor
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Document feeder exit sensor
Removal: Document feeder length-width sensor
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Document feeder length-width sensor
Removal: OPE unit
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: OPE unit
Removal: Platen unit
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Platen unit
Removal: Upper platen
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Upper platen
Removal: CIS unit
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: CIS unit
Removal: Scan drive unit
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Scan drive unit
Removal: Scan home-position sensor and cover-open sensor
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Scan home-position sensor and cover-open sensor
Removal: Laser/scanner unit (LSU)
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Laser/scanner unit (LSU)
Removal: Main drive motor
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Main drive motor
Removal: Exit motor (MFP M436nda only)
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Exit motor (MFP M436nda only)
Removal: Fuser motor
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Fuser motor
Removal: Paper empty, registration, and MP sensor
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Paper empty, registration, and MP sensor
Removal: MP clutch
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: MP clutch
Removal: Registration clutch
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Registration clutch
Removal: Fuser fan
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Fuser fan
Removal: HVPS board
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: HVPS board
Removal: Temperature humidity sensor
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Temperature humidity sensor
Removal: Developer unit
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: Developer unit
Removal: SCF (optional Tray 3)
Introduction
Overview
Before performing service
Required tools
After performing service
Post service test
Remove: SCF board
Remove: SCF drive unit
Remove: SCF feed roller

3. TROUBLESHOOTING
Control panel
Understanding the status LED
Clearing jams
Introduction
Tray 2
In optional Tray 3
In Multi-purpose Tray 1
Inside the printer
In the exit area
In the duplex unit area
Clearing original document jams
Original paper jam in front of scanner
Original paper jam inside of scanner
Original paper jam in exit area of scanner
Original paper jam in scanner duplex path
Firmware upgrades
Determine the installed version of firmware
Perform a firmware upgrade
HP Embedded Web Server
USB Firmware Upgrade
Tech Mode
Overview
Entering Tech mode
Tech mode menu
Tech Mode Menu description
Control-Panel Error Messages
11-2T11
11-2T21
11-2T61
A1-1110
A1-5513
A2-1210
A2-2110
C1-1110, C1-111A
C1-1140, C1-1160, C1-1170
C1-1313, C1-1314
C1-1411
C1-1512
C1-1711, C1-1712
C3-1110
C3-1140, C3-1150, C3-1170
C3-1312, C3-1411, C3-1414
C3-1512
C3-1711, C3-1712
C9-2110, C9-2120,
C9-2220, Error: #C9-2220 / TR Failure: #C9-2220.
H1-1210
H1-1220
H1-1230
H1-1252, H1-1254
M1-1110
M1-1610
M1-5112, M1-5113,
M1-5120
M1-5610
M1-5612
M2-1110
M3-1110
S2-331D
S2-332
S2-3421
S2-4210
S2-4410
S3-3122
S3-3211
S6-3123
U1-2132, U1-2315, U1-2320, U1-2330, U1-2334, U1-2340, U1-234H
U2-1111, U2-1112, U2-1113, U2-1114
U3-3211, U3-3213, U3-3214, U3-3311, U3-3313, U3-3314
U3-3411, U3-3413, U3-3414
U3-3511, U3-3513, U3-3514
U3-3711, U3-3713, U3-3714
U3-4210
Printing quality problems
Adjusting the document feeder skew
Other errors
System diagram

INDEX.