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!

  Paul Inouye 2016-12-16 20:41:53  
  Thanks for the program and manual. I was able to revive a 2 year old 4900. I had 100% blockage in 8 of the 11 heads, and over 50% blockage in the last three.... I ran the ink charge with cleaning fluid. Now I have 100% of the nozzle check pattern on ALL of the heads. I was blown away. I thought for sure I was going to pay for a new head. So, thank you. I also have a an older Epson Stylus Pro 4000. It has been sitting a while and the heads are dried up. Do you have the same program and manual for this printer? I would like to try to revive it as well. If you do could you just send me a link? Thanks again
  Giuseppe Palumbo 2018-02-28 11:30:18  
  IT WORKED!!!!! I just wanted to say THANK YOU SO MUCH!!!!! WOW. Smarties like the ones that started/involved in this company is what makes life a little easier. Thank you SO MUCH once again!!!! VERY Sincerely,Marissa Smith
  koosje rem 2011-10-15 06:36:25  
  thank you so much 2manuals for the reset key and assistance, i'm a baby boomer but i found it easy to do and am so glad i saved a printer, first time i have ever done this and hey i did it, thanks heaps.
  Evgen Test 2010-08-31 09:40:59  
  My printer stopped printing with the error as \"General Error\" Epson quoted me $60 to send an engineer to fix my printer. After reading through the information on this site I decided to fix it myself. Found the problem was related to the waste ink pad counter. Only 10 minutes, I had the the printer working. The printer tested fine and has done approx 150 pages since with NO issues. Thanks for the WIC program!
  Michael Murphy 2025-01-16 12:42:26  
  I have an XP960 and its the best print I have ever had . . . . .I recently replaced the inkpads (like today) as i received the warning. . . .All of a sudden I get the End of Life drama. I needed the printer urgent. . . .I went to another company an waste $40.00AU only yo fing their software couldnt find the printer. . .(panic Button time) So I did a search and found you guys. . . . . It was so easy. . . .It took all of 10mins and the old girl is runnin again. I do have a brand new XP970 sitting in a box in the room but while this one is going, I wont touch it Thanks guys I appreciate you so much Michael (Australia)
  grigri zine 2005-06-15 02:53:35  
  i just wnna thank u for ur gret websit becoz its so easy and shortly . by other wise i need u to info me about service manual if it has trouble codes and diagnostic and troubleshooting procedures ?......thanx
  yasuyuki kawasaki 2020-06-13 17:31:24  
  thanks guys ..i couldnt sort this problem out until i came across your site
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