Xerox Phaser 4400 Laser Printer
Service Manual

$9.99
Xerox Phaser 4400 Laser Printer<br> Service Manual
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The Xerox Phaser 4400 Laser Printer Service Manual is the primary document used for repairing and
maintaining the troubleshooting.

CONTENTS
General Information 1-1
Section Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Phaser 4400 Laser Printer Overview . . . . . . . . . . . . . . . . . . . . 1-2
Parts of the
Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Machine Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Menu Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Printer Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Error Messages and Codes 2-1
Section Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Service Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Printer Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Image Processor POST Error Codes . . . . . . . . . . . . . . . . . . . 2-58
Troubleshooting 3-1
Section Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Troubleshooting Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Image-Quality Checkout Procedures . . . . . . . . . . . . . . . . . . . 3-41
Image-Quality Troubleshooting Procedures . . . . . . . . . . . . . . 3-53
Tests Prints, Adjustments, and NVRAM Reset 4-1
Section Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Service Test Prints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Resetting NVRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
xiv Phaser 4400 Laser Printer Service Manual
Cleaning and Maintenance 5-1
Service Preventive Maintenance Procedure . . . . . . . . . . . . . . . 5-1
FRU Disassembly 6-1
List of Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Covers and Trays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Tray 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18
Paper Feed (Tray 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28
Paper Feed (MPT). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-44
Paper Transportation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-57
Exit Assembly and Fuser. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-65
Xerographics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-79
Main Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-84
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-87
Stacker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-101
Optional Paper Feeder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-120
Duplex Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-141
Envelope Feeder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-157
Parts Lists 7-1
Parts List Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Using the Parts Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Theory of Operation 8-1
Section Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Print Process Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3 Print Process Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
The Paper Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11
Drive Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14
Engine Logic Board and Front Panel Functions . . . . . . . . . . . 8-22
Image Processor Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22
Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-23
Interlocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-24
Phaser 4400 Laser Printer Service Manual xv
Laser Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-25
Fuser Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-26
Erase Cycle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-28
Fan Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-28
Duplex Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-29
Envelope Feeder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-33
Stacker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-37
Option Feeder Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-42
Wiring Data 9-1
Section Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
Base Engine Wiring Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
550-Sheet Feeder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-22
Duplex Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-26
Stacker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-31
Envelope Feeder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-37
xvi Phaser 4400 Laser Printer Service Manual
Phaser 4400 Laser Printer Service Manual 1-1
General Information
The Xerox Phaser. 4400 Laser Printer Service Manual is the primary document used for repairing, maintaining and troubleshooting.
To ensure complete understanding of the product, participation in Xerox Phaser 4400 Service Training is recommended.
Section Contents
Phaser 4400 Laser Printer
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Printer Memory Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Monitoring Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Repackaging Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Parts of the Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Base Configuration Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Internal Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Printer Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Front Panel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Image Processor Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Machine Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12
Menu Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-13
Printer Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-14
Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Media and Tray Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Functional Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

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We are in business since 2002 and do our best to give our customers perfect service!

  luis espitia 2017-09-16 08:15:16  
  Put in the rest key, 20 seconds later up and running, great product, will continue to use you in the future and will recommend to friends, thanks a lot.
  Ng Jong Hwa 2005-03-08 07:17:37  
  very good!
  Alfredo Llerena 2020-02-20 17:11:29  
  I must admit I was very skeptical about all this !!! And above all - There we go, they want the Credit Card details !!!

I don't even know the current exchange rate but proceeded thinking nothing will come of this ....

Within minutes I was sent the RESET CODE along with the RECEIPT FOR PAYMENT !

It worked like a charm !

The FIRST , but definitely not the LAST time I will be using this site !

Thank you !
Anthony Campbell
Printamedic (South Africa)
Cell: 073 580 8517
  ap apa 2009-03-25 20:36:36  
  i got my service manual for panasonic dr-49 receiver. Thanks a lot for very clear service manual...
  Mike Danilovic 2005-08-25 07:56:41  
  Great things! I had some problems with my Epson 2100. The printer stopped to work. However, when I read the manual it was possible for me to disable the indicator of the problem and now the printer works well again. The service program is also a great think! Thanks.
  jam epson 2008-07-15 15:29:21  
  I need it
  dave burrow 2010-09-02 22:34:09  
  Dear John Re: 20748 / 20995 I would like to take this occassion to to say "Thank Very Much" for your reset product (WIC) on my epson sx115's. They worked perfectly and certainly did the job! I will buy from you again in the near future and would like to confirm that i would have no hesitation to recomend you to anybody. Keep up the good service. kindest regards Dave Burrow photographixdesign
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