Reproduction, adaptation, or translation without
prior written permission is prohibited, except as
allowed under the copyright laws.
The information contained herein is subject to
change without notice.
The only warranties for HP products and
services are set forth in the express warranty
statements accompanying such products and
services. Nothing herein should be construed as
constituting an additional warranty. HP shall not
be liable for technical or editorial errors or
omissions contained herein.
Edition 4, 4/2018
Adobe®, Acrobat®, and PostScript® are
tr
ademarks of Adobe Systems Incorporated.
Microsoft®, Windows®, Windows® XP, and
Windows Vista® are U.S. registered trademarks
of Microsoft Corporation.
Conventions used in this guide
TIP:Tips provide helpful hints or shortcuts.
NOTE:Notes provide important information to explain a concept or to complete a task.
CAUTION:Cautions indicate procedures that you should follow to avoid losing data or damaging the product.
WARNING!Warnings alert you to specic procedures that you should follow to avoid personal injury,
catastrophic loss of data, or extensive damage to the product.
ENWWiii
iv Conventions used in this guideENWW
Table of contents
1 Product specs and features .................................................................................................................................................................... 1
General Specications ......................................................................................................................................... 3
Paper handling specication .............................................................................................................................. 7
Maintenance parts ............................................................................................................................................... 9
System conguration ............................................................................................................................................................ 11
Feeding system ...................................................................................................................................................................... 14
Feeding system overview ................................................................................................................................ 14
Main components and functions ..................................................................................................................... 15
Pickup roller and friction pad ........................................................................................................................... 18
MPF(Multi-Purpose Feeder) unit ..................................................................................................................... 19
Printing process overview ................................................................................................................................ 21
Imaging unit ........................................................................................................................................................ 21
Imaging unit overview .................................................................................................................. 21
Developer unit ............................................................................................................................... 22
Fuser unit ................................................................................................................................................................................. 25
Fuser unit overview ........................................................................................................................................... 25
Fuser unit temperature control ....................................................................................................................... 26
Laser Scanning unit (LSU) ..................................................................................................................................................... 28
Drive system ........................................................................................................................................................................... 31
Scanner System ..................................................................................................................................................................... 36
Scanner system overview ................................................................................................................................ 36
Scanning system components ........................................................................................................................ 36
Electrical parts location .................................................................................................................................... 39
Document feeder drive system ....................................................................................................................... 39
2 Removal and replacement .................................................................................................................................................................... 61
For additional service and support ...................................................................................................................................... 63
Removal and replacement strategy ................................................................................................................................... 64
Types of screws ................................................................................................................................................. 65
Service approach .................................................................................................................................................................... 65
viENWW
Before performing service ............................................................................................................................... 65
After performing service .................................................................................................................................. 65
Post-service test ................................................................................................................................................ 66
Print-quality test ........................................................................................................................... 66
Removal: Transfer roller ....................................................................................................................................................... 71
After performing service .............................................................................................................. 71
Post service test ............................................................................................................................ 71
Remove: Transfer roller .................................................................................................................................... 71
Removal: Fuser unit ............................................................................................................................................................... 74
After performing service .............................................................................................................. 74
Post service test ............................................................................................................................ 74
Remove: Fuser unit ........................................................................................................................................... 74
Removal: Imaging unit (drum unit and developer) ........................................................................................................... 77
After performing service .............................................................................................................. 77
Post service test ............................................................................................................................ 77
Remove: Imaging unit (drum unit and developer) ....................................................................................... 77
Removal: Pickup roller and friction pad .............................................................................................................................. 88
After performing service .............................................................................................................. 88
Post service test ............................................................................................................................ 88
Remove: Pickup roller and friction pad .......................................................................................................... 88
Removal: MP pickup roller and friction pad ....................................................................................................................... 91
Removal: Front cover .......................................................................................................................................................... 102
After performing service ........................................................................................................... 102
Post service test ......................................................................................................................... 102
Remove: Front cover ...................................................................................................................................... 102
Removal: Left cover ............................................................................................................................................................ 104
After performing service ........................................................................................................... 104
Post service test ......................................................................................................................... 104
Remove: Left cover ......................................................................................................................................... 104
Removal: Front cover open sensor ................................................................................................................................... 110
After performing service ........................................................................................................... 110
Post service test ......................................................................................................................... 110
Remove: Front cover open sensor ............................................................................................................... 110
Removal: Side unit ............................................................................................................................................................... 112
After performing service ........................................................................................................... 112
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Post service test ......................................................................................................................... 112
Remove: Side unit ........................................................................................................................................... 112
Removal: Side cover-open sensor .................................................................................................................................... 114
Removal: OPE unit ............................................................................................................................................................... 144
After performing service ........................................................................................................... 144
Post service test ......................................................................................................................... 144
Remove: OPE unit ........................................................................................................................................... 144
Removal: Platen unit ........................................................................................................................................................... 147
After performing service ........................................................................................................... 147
Post service test ......................................................................................................................... 147
Remove: Platen unit ....................................................................................................................................... 147
Removal: CIS unit ................................................................................................................................................................. 154
After performing service ........................................................................................................... 154
Post service test ......................................................................................................................... 154
Remove: CIS unit ............................................................................................................................................. 154
Removal: Scan drive unit .................................................................................................................................................... 156
After performing service ........................................................................................................... 160
Post service test ......................................................................................................................... 160
Remove: Laser/scanner unit (LSU) ............................................................................................................... 160
Removal: Main drive motor ................................................................................................................................................ 162
After performing service ........................................................................................................... 162
Post service test ......................................................................................................................... 162
Remove: Main drive motor ............................................................................................................................ 162
Removal: Exit motor (MFP M436nda only) ...................................................................................................................... 164
After performing service ........................................................................................................... 164
Post service test ......................................................................................................................... 164
Remove: Exit motor (MFP M436nda only) .................................................................................................. 164
Removal: Fuser motor ........................................................................................................................................................ 166
After performing service ........................................................................................................... 166
Post service test ......................................................................................................................... 166
Remove: Fuser motor ..................................................................................................................................... 166
Removal: Paper empty registration MP sensor .............................................................................................................. 168
Removal: Fuser fan .............................................................................................................................................................. 177
After performing service ........................................................................................................... 177
Post service test ......................................................................................................................... 177
Remove: Fuser fan .......................................................................................................................................... 177
After performing service ........................................................................................................... 181
Post service test ......................................................................................................................... 181
Remove: Temperature humidity sensor ..................................................................................................... 181
Removal: Developer unit .................................................................................................................................................... 184
After performing service ........................................................................................................... 184
Post service test ......................................................................................................................... 184
Remove: Developer unit ................................................................................................................................. 184
Control panel ........................................................................................................................................................................ 200
Understanding the status LED ........................................................................................................................................... 201
In optional Tray 3 ............................................................................................................................................ 205
In Multi-purpose Tray 1 .................................................................................................................................. 208
Inside the printer ............................................................................................................................................. 209
In the exit area ................................................................................................................................................. 211
In the duplex unit area ................................................................................................................................... 213
Clearing original document jams .................................................................................................................. 215
Original paper jam in front of scanner .................................................................................... 215
Original paper jam inside of scanner ....................................................................................... 217
Original paper jam in exit area of scanner .............................................................................. 220
Original paper jam in scanner duplex path ............................................................................. 222
Tech mode menu ............................................................................................................................................ 227
Tech Mode Menu description ........................................................................................................................ 229
Control Panel Error Messages ........................................................................................................................................... 238
11-2T11, Paper mismatch Tray 2 Load [A4] [Plain] Continue ⊙ Cancel X ............................................ 238
11-2T21, Paper mismatch Tray 3 Load [A4] [Plain] Continue ⊙ Cancel X ............................................ 238
11-2T61, Paper mismatch Tray 1Load [A4] [Plain] Continue ⊙ Cancel X ............................................. 238
A1-1110, Error: #A1-1110 / Motor Failure: #A1-1110. Turn o then on. Call for service if the
problem persists ............................................................................................................................................. 238
A1–5513, Error: #A1–5513 / Motor Failure: #A1-1110. Turn o then on. Call for service if the
problem persists ............................................................................................................................................. 239
A2-1210, Error: #A2-1210 / Fan Failure: #A2-1210. Turn o then on. Call for service if the
problem persists ............................................................................................................................................. 241
A2-2110, Error: #A2-2110 / Fan Failure: #A2-2110. Turn o then on. Call for service if the
problem persists ............................................................................................................................................. 241
H1-1210, Paper jam in tray 2 ....................................................................................................................... 254
H1-1220 Tray 2 door is open. Close it ......................................................................................................... 254
H1-1252, H1-1254, Paper empty in tray 2 / Paper is empty in tray 3. Load paper ............................ 255
M1-1110, Paper jam in tray 1 ....................................................................................................................... 255
M1-1610, Paper jam in tray 1 ....................................................................................................................... 256
M1-5112, M1-5113, Paper empty in tray 1 / Paper is empty in tray 1. Load paper ........................... 257
M1-5120, All Trays Empty / Paper is empty in all trays. Load paper ..................................................... 258
M1-5610, Paper Normal in Tray 1 ................................................................................................................ 258
M1-5612, Paper empty in Tray 1. Load paper ........................................................................................... 259
M2-1110, M2-2210 Jam inside errors ........................................................................................................ 259
M3-1110, Jam in exit area ............................................................................................................................. 261
S2-331D, Waiting for low temp / Waiting delay time for lower xing temperature… ......................... 262
S2-3321, Supplying Toner / Supplying and mixing toner to developer unit. Please wait… ................ 262
U3-3211, U3-3213, U3-3214, U3-3311, U3-3313, U3-3314 Original paper jam / Original
paper jam inside of scanner. Remove jam .................................................................................................. 267
U3-3411, U3-3413, U3-3414 Original paper jam / Original paper jam inside of scanner.
Remove jam ..................................................................................................................................................... 269
U3-3511, U3-3513, U3-3514 Original paper jam / Original paper jam inside of scanner.
Remove jam ..................................................................................................................................................... 270
U3-3711, U3-3713, U3-3714 Original paper jam / Original paper jam inside of scanner.
Remove jam ..................................................................................................................................................... 271
U3-4210 Scanner door open / Top door of scanner is open. Close the door ....................................... 272
Adjusting the document feeder skew .............................................................................................................................. 278
Other errors .......................................................................................................................................................................... 280
System diagram ................................................................................................................................................................... 281
Index ........................................................................................................................................................................................................... 289
xviiiENWW
1Product specs and features
This chapter presents an overview of the major components of the printer, and it includes a detailed discussion
of the image-formation system.
ENWW1
Product Overview
●Printing speed
–Up to 20 ppm on A4 or Letter M433
–Up to 23 ppm on A4 or Letter M436
●Scan speed (ADF)
–30 ipm @ color 200dpi, 30 ipm @ mono 300dpi
●Processor
–600 MHz
●Memory
–128 MB
●Option unit
–Document feeder (M436n/dn only)
2Chapter 1 Product specs and featuresENWW
Specications
Product specications are subject to change without notice.
General Specications
Table 1-1 General specications
ItemSpecication
Function●HP LaserJet MFP M433a Printer: Print,
TemperatureOperating10 ~ 30 °C (50 ~ 86°F)
HumidityOperating20~80% RH
Copy, Scan
●HP LaserJet MFP M436dn Printer:
Print, Copy, Scan, Network, Duplex
●HP LaserJet MFP M436n Printer: Print,
Copy, Scan
●HP LaserJet MFP M436nda Printer:
Print, Copy, Scan, Network, Duplex
Storage-10 ~ 40 °C (-4 ~ 104 °F)
Storage10~90% RH
Acoustic Noise Level (Sound Power/
Pressure)
Power SupplyInput VoltageAC 220-240V (-10%~6%)/5A
Power ConsumptionReady70 Wh
Dimension (W x L x H)M436n/M436dn models560 x 540 x 417 mm (22.05 x 21.26 x
Printing●Tray 2: 49 dBA
●Tray 3: 51 dBA
●MP Tray 1: 51 dBA
Copying●Tray 2: 49dBA (@platen), 53dBA
(@document feeder)
●Tray 3: 51dBA(@platen), 55dBA
(@document feeder)
●MP Tray 1: 51dBA(@platen), 55dBA
(@document feeder)
Rated Frequency50 Hz
Printing500 Wh
Copying500 Wh
Scanning70 Wh
Power O0.3 W
16.42 inches)
M436nda models560 x 583.5 x 504.5 mm (22.5 x 22.97 x
When supplies reach the end of their life span, you can order the followings of supplies for your machine:
ItemDescriptionPart number
Toner CartridgeStandard-capacity replacement black toner
Imaging unit
1
The imaging unit must be installed by a service technician.
1
WARNING!When purchasing new toner cartridges or other supplies, these must be purchased in the same
country/region as the machine you are using. Otherwise, new toner cartridges or other supplies will be
incompatible with your machine due to dierentcongurations of toner cartridges and other supplies according
to the specic country/region conditions.
CAUTION:HP does not recommend using non-genuine HP toner cartridge such as relled or remanufactured
toner. HP cannot guarantee non-genuine HP toner cartridge's quality. Service or repair required as a result of
using non-genuine HP toner cartridges will not be covered under the machine’s warranty.
NOTE:Depending on the options, percentage of image area and job mode used, the toner cartridge’s life span
may dier.
Maintenance parts
Table
1-9 Maintenance parts
CF256A
cartridge
High-capacity replacement black toner
cartridge
Replacement imaging drumCF257A
CF256X
ItemKit numberLife
Pick-up roller and friction padW7U01-67903Approx. 100,000 pages
MP Pick-up roller and 50k friction pad (for
MP Tray)