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!

  shiju vengad 2009-06-11 16:12:40  
  Thanks John I figured it out.. I didn\'t read things as well as I should have.. and panicked a bit. The good news is my Epson 1280 printer is up and running again thanks to your manual. George
  Ronald Guevarra 2020-07-19 18:26:14  
  Great software! Helped me out most when i needed. Downloaded software and used the trail key and instantly reset my printer, will definitely purchase key next time when needed. Thanks
  Paul Jumbo 2019-04-19 18:47:57  
  I had Epson WF-2650 and it wasn't printing fully, skipping lines, even though colors were full.
I did a lot of cleaning, head cleaning, put new cartridge but no luck. I did some head cleaning using glass cleaner and syringes as shown on various youtube video.
After that, my printer didn't recognize two of the cartridges. I tried everything, cleaning contacts etc, nothing worked.

I was finally going to buy new cartridges however stores were closed today so I decided to look for chip-resetting tool but nothing good was available locally.

I came across this WIC reset utility and was really skeptical if it will work. I took the chance, bought the key, used the tool to reset firmware to chipless firmware, it was successful at the first go.
At this point, printer showed all ink levels 100%. I printed a test page and it came out perfect.
To make it even more interesting for me, I live in Europe and during one of the trip, I bought two sets of XL cartridges for this same model but printer didn't recognize in the past and I was going to throw them since these were no good for my EU model. I tried these again after chip reset firmware and voila, they works too.

I am amazed at the propaganda of these printer manufactures that even original printer cartridges from US didn't work on the model here in EUROPE, these used to fit perfectly but printer wouldn't recognize however, now they works too.
Today, I was almost ready to trash my 2.5 yr old and not much used printer but after a lot of trying and finally using WIC reset utility, the printers works like new and saved me a lot!

These were the best 20 CHF/USD I spent today!
Thank you very much and I don't need to worry about relying on a hardware chip-reset tool. I will now be able to use US model cartridges and re-fill i like without having to worry. I even printed some photos using this same printer on photo paper today and printer did an excellent job.
  Joice Rolim 2015-06-03 07:42:55  
  John, I wanted to thank you for the excellent service you provided to me. My printer is now working again! There is a site based in England called \"fixyourownprinter.com\". If you want I can leave a message on their forum recommending your site. Let me know if you want this.
  ed dy 2007-06-15 00:30:52  
  Canon service manual for iP1200, ip1600 worked out fine!!
  Gerry McNeilly 2009-12-31 07:30:21  
  Thanks John, I received your reply and downloaded the correct version. I appreciate the prompt customer service, and I plan on returning as a customer. Regards, Gerry McNeilly
  eloana coelho 2023-12-18 17:33:46  
  I always bought the key and it arrived correctly, but unfortunately in my last 3 purchases, the key did not arrive. I already sent an email to support with the order number with the problem, they told me that everything was resolved, but nothing was resolved, and I still don't have the key. very bad and slow customer support, it took almost 2 days for useless response.
  kin thil 2007-02-08 19:44:43  
  I have reset the waste ink in my epson R230 printer. Worked fine
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