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Phaser 4400 Laser Printer Service Manual
Service Flowchart
The Service Flowchart outlines one possible approach to troubleshooting and repair
of the printer. The Service Flowchart is an overview of the path a service technician
could take, using this technical manual, to service the printer and options.
If you choose not to use the Service Flowchart, it is recommended that you start at the
appropriate troubleshooting table and proceed from there.
Step 1: Identify the Problem:
1. Verify the reported problem does exist.
2. Check for any error codes and write them down.
3. Print Test Prints.
4. Make note of any print-quality problems in the Test Prints.
5. Make note of any mechanical or electrical abnormalities present.
6. Make note of any unusual noise or smell coming from the printer.
7. Print a Usage Profile Report, if the printer is able to print.
8. View the fault history under the Service Tools Menu
9. Verify the AC input power supply is within proper specifications.
Step 2: Inspect and Clean the Printer:
1. Switch OFF printer power.
2. Disconnect the AC power cord from the wall outlet.
3. Verify the power cord is free from damage or short circuit and is connected properly.
4. Remove the Print Cartridge and protect it from light.
5. Inspect the printer interior and remove any foreign matter such as paper clips,
staples, pieces of paper, dust or toner.
6. Clean the printer interior with a lint-free cloth, dampened slightly with cold water and
mild detergent.
■
Do not use solvents or chemical cleaners to clean the printer interior.
■
Do not use any type of oil or lubricant on printer parts.
■
Use only an approved toner vacuum.
7. Clean all rubber rollers with a lint-free cloth, dampened slightly with cold water and
mild detergent.
8. Inspect the interior of the printer for damaged wires, loose connections, toner
leakage, and damaged or obviously worn parts.
9. If a Print Cartridge appears obviously damaged, replace with a new one.
Step 3: Find the Cause of the Problem:
1. Use the Print Engine Error Messages table (
page 2-11
) or POST Error Code table
(
page 2-58
) to find the cause of the problem.
2. Use Diagnostics to check printer and optional components.
3. Use the Wiring Diagrams and Plug/Jack Locator to locate test points.
4. Take voltage readings at various test points as instructed in the appropriate
troubleshooting procedure.
5. Use the
Engine Logic Board Test Print
on page 3-49, to isolate print capability
problems between the print engine the Image Processor Board.
Step 4: Correct the Problem:
1. Use the Parts List to locate a part number
2. Use the Removal and Replacement Procedures to replace the part.
Step 5: Final Checkout:
1. Test the printer to be sure you have corrected the initial problem and there are no
additional problems present.
Summary of Contents for 4400DT - Phaser B/W Laser Printer
Page 1: ...Service Manual P h a s e r L a s e r P r i n t e r 4400...
Page 2: ......
Page 13: ...xii Phaser 4400 Laser Printer Service Manual...
Page 17: ...xvi Phaser 4400 Laser Printer Service Manual...
Page 37: ...1 20 Phaser 4400 Laser Printer Service Manual...
Page 140: ...Phaser 4400 Laser Printer Service Manual 3 43 Test Print...
Page 181: ...3 84 Phaser 4400 Laser Printer Service Manual...
Page 184: ...Phaser 4400 Laser Printer Service Manual 4 3...
Page 191: ...4 10 Phaser 4400 Laser Printer Service Manual...
Page 193: ...5 2 Phaser 4400 Laser Printer Service Manual...
Page 212: ...Phaser 4400 Laser Printer Service Manual 6 19 Retard Roller Assembly...
Page 214: ...Phaser 4400 Laser Printer Service Manual 6 21 Retard Roller Friction Clutch Assembly...
Page 218: ...Phaser 4400 Laser Printer Service Manual 6 25 Motor Assembly...
Page 220: ...Phaser 4400 Laser Printer Service Manual 6 27 Connector and Socket Guide...
Page 231: ...6 38 Phaser 4400 Laser Printer Service Manual Feeder PWB...
Page 239: ...6 46 Phaser 4400 Laser Printer Service Manual MPT Pick Up Cam MPT Roller Assembly...
Page 247: ...6 54 Phaser 4400 Laser Printer Service Manual MPT No Paper Sensor...
Page 257: ...6 64 Phaser 4400 Laser Printer Service Manual Registration Springs Rubber Registration Roller...
Page 261: ...6 68 Phaser 4400 Laser Printer Service Manual Fuser Harness Assembly...
Page 263: ...6 70 Phaser 4400 Laser Printer Service Manual Exit Chute Assembly...
Page 268: ...Phaser 4400 Laser Printer Service Manual 6 75 Mid 1 Roller Assembly Mid 2 Roller Assembly...
Page 271: ...6 78 Phaser 4400 Laser Printer Service Manual Heat Rod Fuser Upper Cover...
Page 279: ...6 86 Phaser 4400 Laser Printer Service Manual Drive Gear Assembly...
Page 286: ...Phaser 4400 Laser Printer Service Manual 6 93 HVPS PWB...
Page 293: ...6 100 Phaser 4400 Laser Printer Service Manual Duplex Harness Assembly...
Page 296: ...Phaser 4400 Laser Printer Service Manual 6 103 Exit Tray Paper Weight Exit Tray...
Page 330: ...Phaser 4400 Laser Printer Service Manual 6 137 Size Sensor Housing Assembly 4...
Page 341: ...6 148 Phaser 4400 Laser Printer Service Manual Upper Chute Assembly...
Page 364: ...Phaser 4400 Laser Printer Service Manual 6 171 Clutch and Bearing Bottom Roller Assembly...
Page 366: ...Phaser 4400 Laser Printer Service Manual 6 173 Feed Roller Shaft Feed Roller Assembly 1...
Page 368: ...Phaser 4400 Laser Printer Service Manual 6 175 Feed Roller Shaft Feed Roller Assembly 2...
Page 370: ...Phaser 4400 Laser Printer Service Manual 6 177 Feed Belts...
Page 371: ...6 178 Phaser 4400 Laser Printer Service Manual...
Page 374: ...Phaser 4400 Laser Printer Service Manual 7 3 PL 1 1 Covers 1 of 2 Exploded View...
Page 376: ...Phaser 4400 Laser Printer Service Manual 7 5 PL 1 2 Covers 2 of 2 Exploded View...
Page 378: ...Phaser 4400 Laser Printer Service Manual 7 7 PL 2 1 Tray 1 1 of 2 Exploded View...
Page 380: ...Phaser 4400 Laser Printer Service Manual 7 9 PL 2 2 Tray 1 2 of 2 Exploded View...
Page 382: ...Phaser 4400 Laser Printer Service Manual 7 11 PL 3 1 Paper Feeder Exploded View...
Page 384: ...Phaser 4400 Laser Printer Service Manual 7 13 PL 4 1 MPT Chute Exploded View...
Page 386: ...Phaser 4400 Laser Printer Service Manual 7 15 PL 5 1 Paper Handler Assembly Exploded View...
Page 388: ...Phaser 4400 Laser Printer Service Manual 7 17 PL 6 1 Chute Transport and Fuser Exploded View...
Page 390: ...Phaser 4400 Laser Printer Service Manual 7 19 PL 7 1 Exit Exploded View...
Page 392: ...Phaser 4400 Laser Printer Service Manual 7 21 PL 8 1 Drive and Xerographics Exploded View...
Page 394: ...Phaser 4400 Laser Printer Service Manual 7 23 PL 9 1 Frame and Size Sensor Exploded View...
Page 396: ...Phaser 4400 Laser Printer Service Manual 7 25 PL 10 1 Electrical Exploded View...
Page 398: ...Phaser 4400 Laser Printer Service Manual 7 27 PL 11 1 550 Sheet Feeder 1 of 2 Exploded View...
Page 400: ...Phaser 4400 Laser Printer Service Manual 7 29 PL 11 2 550 Sheet Feeder 2 of 2 Exploded View...
Page 402: ...Phaser 4400 Laser Printer Service Manual 7 31 PL 12 1 Envelope Feeder 1 of 2 Exploded View...
Page 404: ...Phaser 4400 Laser Printer Service Manual 7 33 PL 12 2 Envelope Feeder 2 of 2 Exploded View...
Page 406: ...Phaser 4400 Laser Printer Service Manual 7 35 PL 13 1 Duplex 1 of 2 Exploded View...
Page 408: ...Phaser 4400 Laser Printer Service Manual 7 37 PL 13 2 Duplex 2 of 2 Exploded View...
Page 410: ...Phaser 4400 Laser Printer Service Manual 7 39 PL 14 1 Stacker 1 of 2 Exploded View...
Page 412: ...Phaser 4400 Laser Printer Service Manual 7 41 PL 14 2 Stacker 2 of 2 Exploded View...
Page 413: ...7 42 Phaser 4400 Laser Printer Service Manual...
Page 443: ...8 30 Phaser 4400 Laser Printer Service Manual Duplex Unit Paper Path...
Page 459: ...8 46 Phaser 4400 Laser Printer Service Manual Major Components of the Option Feeder Assembly...
Page 466: ...Phaser 4400 Laser Printer Service Manual 9 7 Base Engine P J Location Map 2 of 2 910 1 910 1...
Page 468: ...Phaser 4400 Laser Printer Service Manual 9 9 Base Engine Block Diagram 2 of 4 2...
Page 469: ...9 10 Phaser 4400 Laser Printer Service Manual Base Engine Block Diagram 3 of 4 3...
Page 470: ...Phaser 4400 Laser Printer Service Manual 9 11 Base Engine Block Diagram 4 of 4 4...
Page 471: ...9 12 Phaser 4400 Laser Printer Service Manual Block Diagram Tray 1 Tray 2 and Tray 3...
Page 479: ...9 20 Phaser 4400 Laser Printer Service Manual Engine Logic Board to Laser Assembly...
Page 480: ...Phaser 4400 Laser Printer Service Manual 9 21 Image Processor Board to Front Panel...
Page 483: ...9 24 Phaser 4400 Laser Printer Service Manual 550 Sheet Feeder Block Diagram 1 of 2...
Page 484: ...Phaser 4400 Laser Printer Service Manual 9 25 550 Sheet Feeder Block Diagram 2 of 2...
Page 486: ...Phaser 4400 Laser Printer Service Manual 9 27 Duplex Unit P J Map...
Page 487: ...9 28 Phaser 4400 Laser Printer Service Manual Duplex Unit Block Diagram...
Page 488: ...Phaser 4400 Laser Printer Service Manual 9 29 Engine Logic Board to Duplex PWB...
Page 491: ...9 32 Phaser 4400 Laser Printer Service Manual Stacker P J Map...
Page 492: ...Phaser 4400 Laser Printer Service Manual 9 33 Stacker Block Diagram...
Page 493: ...9 34 Phaser 4400 Laser Printer Service Manual Engine Logic Board to Stacker PWB...
Page 497: ...9 38 Phaser 4400 Laser Printer Service Manual Envelope Feeder P J Map...
Page 498: ...Phaser 4400 Laser Printer Service Manual 9 39 Envelope Feeder Block Diagram...
Page 501: ...9 42 Phaser 4400 Laser Printer Service Manual...
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