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Phaser 4400 Laser Printer Service Manual
3-1
Troubleshooting
Introduction
This section covers two types of troubleshooting procedures:
■
Troubleshooting procedures for problems not directly associated with error
messages or codes
■
Troubleshooting Procedures for Image-quality (IQ) problems
Troubleshooting procedures will normally isolate a problem to a specific component
or subassembly, in some cases including the wire harnesses.
In the Yes/No steps of the procedures, a Yes/No response will either lead you to the
next step or will indicate a corrective action. When you complete the indicated
corrective action, restart the System Check to verify that the problem has been
corrected.
Measurements
Power and signal grounds are connected to frame ground. You can perform all circuit
troubleshooting using the metal frame (chassis) as the grounding point. If you need
more information to locate connectors or test points, refer to
Wiring Data
on page 9-1.
Unless otherwise specified, the following voltage tolerances are used within this
section:
Section Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Index of Troubleshooting Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Image-Quality Checkout Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-41
Index of Image-Quality Checkout Procedures . . . . . . . . . . . . . . . . . . . . . . . . 3-41
Image-Quality Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . .3-53
Index of Image-Quality Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . 3-53
Voltage Measurements
Stated
Measured
Stated
Measured
+3.3 VDC
+3.0 to 3.6 VDC
+24.0 VDC +21.6 to +26.4 VDC
+5.0 VDC
+4.8 to +5.2 VDC
0.0 VDC
Less than +0.5 VDC
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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