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8-40
Phaser 4400 Laser Printer Service Manual
Function of Major Components
The two figures on
page 8-39
show the major components of the Stacker.
■
Drive Motor Assembly — Drives the Stacker Mid Roller Assembly and the
Exit Roller Assembly.
■
Offset Motor Assembly — Shifts the Offset Roller Assembly.
■
Stack Full Sensor and Stack Full Actuator — Detects when the stacking of
the Exit Tray exceeds 500 sheets of paper.
■
Stacker PWB — Controls Stacker operations.
■
Offset Roller Assembly — Drives printed pages into the Stacker Tray,
offsetting each from the normal position.
■
Stacker Exit Sensor Assembly — Located between the Mid Stacker Roller
Assembly and the Offset Roller Assembly, it detects when paper passes into
the Tray Exit.
■
Home Sensor — The Stacker Home Sensor detects when the Offset Roller
Assembly is in the home position. It is turned On when the Core Gear is
located at the sensing point of the Stacker Home Sensor.
■
Direction Solenoid
and Lever — Switches the paper path between the
normal paper path and the Stacker paper path.
Stacker Control
Offset Motor Control
When the end of a sheet of paper reaches the Stacker Exit Sensor Assembly, the
sensor signal goes Low. The Offset Motor Assembly begins rotating clockwise for a
specified time after the signal goes Low. This clockwise rotation shifts the sheet of
paper from the normal position. At the specified time after the Sensor Assembly Exit
goes Low, the Exit Motor Assembly begins rotating in the counterclockwise
direction, moving the Offset Roller Assembly back into home position, until the
Sensor Stacker Home signal (/Stacker HOME) goes Low. When the power is first
switched on, the Offset Motor Assembly performs this offset operation once to make
sure the Offset Roller Assembly is in the home position.
Duplex Operation
When the printer is running in Duplex mode, the paper partially feeds out into the
standard Exit Tray (under the Stacker Assembly). The paper then reverses direction,
is printed on the second side, and sent to the Exit Tray of the Stacker.
Full Stack Detection
The Engine Logic Board examines the state of the Full Stack Sensor after the Sensor
Assembly Exit signal goes Low. The Engine Logic Board detects that the Exit Tray is
full when the Stack Full Sensor remains High for a set number of successive Exit
Sensor Assembly actuations (sheets of paper exiting in the Stacker). The Stack Full
condition stays in affect until the Stack Full Sensor goes Low.
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...
Page 502: ......
Page 503: ...071 0861 00...