Xerox Phaser 790 User Manual

10/00
4-1
Phaser 790/DocuColor 2006
Repairs and Adjustments
Initial Issue
4 Repairs and Adjustments
Electrical
REP 1.1 LVPS................................................................................................................. 4-5
REP 1.2 HVPS................................................................................................................ 4-5
REP 1.3 Top Cover Interlock .......................................................................................... 4-6
REP 1.4 Developer Fan .................................................................................................. 4-6
REP 1.5 MCU PWB ........................................................................................................ 4-7
REP 1.6 Right Front Cover Interlock............................................................................... 4-8
REP 1.7 Left Front Cover Interlock ................................................................................. 4-8
REP 1.8 Environment Sensor ......................................................................................... 4-9
REP 1.9 ESS PWB ......................................................................................................... 4-10
REP 1.10 ESS Fan ......................................................................................................... 4-11
REP 1.11 Controller Chassis .......................................................................................... 4-11
REP 1.12 Communication PWB...................................................................................... 4-12
REP 1.13 Hard Disk Drive Assembly .............................................................................. 4-13
Drives
REP 4.1 Paper Handling Drive Unit ................................................................................ 4-15
REP 4.2 Fuser Drive Unit................................................................................................ 4-16
REP 4.3 Fuser Motor ...................................................................................................... 4-17
REP 4.4 Paper Handling Motor....................................................................................... 4-17
REP 4.5 Drive Motor PWB .............................................................................................. 4-18
REP 4.6 Process Drive Unit ............................................................................................ 4-19
REP 4.7 Rotary Motor..................................................................................................... 4-20
REP 4.8 Rotary Motor PWB............................................................................................ 4-20
REP 4.9 Dispense Clutch................................................................................................ 4-21
REP 4.10 Developer Clutch ............................................................................................ 4-21
ADF
REP 5.1 ADF Assembly.................................................................................................. 4-23
REP 5.2 ADF Drive Motor ............................................................................................... 4-24
REP 5.3 Counterbalance ................................................................................................ 4-24
REP 5.4 Feed Roll .......................................................................................................... 4-25
REP 5.5 Nudger Roll....................................................................................................... 4-26
REP 5.6 Registration Roll ............................................................................................... 4-29
REP 5.7 Document Transport Assembly ........................................................................ 4-31
REP 5.8 Platen Belt ........................................................................................................ 4-32
REP 5.9 ADF Exit Motor ................................................................................................. 4-33
REP 5.10 ADF Exit Sensor and Exit Tray Interlock ........................................................ 4-34
Imaging
REP 6.1 Platen Glass ..................................................................................................... 4-37
REP 6.2 Right Cover....................................................................................................... 4-37
REP 6.3 Left Cover ......................................................................................................... 4-38
REP 6.4 Rear Cover ....................................................................................................... 4-38
REP 6.5 Angle Sensor .................................................................................................... 4-39
REP 6.6 Platen Switch .................................................................................................... 4-39
REP 6.7 Registration Sensor .......................................................................................... 4-40
REP 6.8 IIT Low Voltage Power Supply (LVPS)............................................................. 4-41
REP 6.9 Fan.................................................................................................................... 4-41
REP 6.10 APS Sensor .................................................................................................... 4-42
REP 6.11 PWB Box......................................................................................................... 4-43
REP 6.12 PWB Box Cover.............................................................................................. 4-45
REP 6.13 IPS PWB......................................................................................................... 4-45
REP 6.14 ICM Main PWB ............................................................................................... 4-46
REP 6.15 Extension PWB ............................................................................................... 4-47
REP 6.16 Advanced Features Memory PWB.................................................................. 4-47
REP 6.17 Front / Rear Cable Assembly.......................................................................... 4-48
REP 6.18 Carriage Motor................................................................................................ 4-49
REP 6.19 Belt.................................................................................................................. 4-50
REP 6.20 Lamp............................................................................................................... 4-50
REP 6.21 Full-rate Carriage Assembly ........................................................................... 4-51
REP 6.22 FLPS PWB...................................................................................................... 4-51
REP 6.23 Control Panel Assembly.................................................................................. 4-52
Paper Supply
REP 7.1 Size Switch PWB .............................................................................................. 4-53
REP 7.2 Sensor Bracket ................................................................................................. 4-53
REP 7.3 No Paper Sensor Assembly.............................................................................. 4-54
REP 7.4 No Paper Sensor .............................................................................................. 4-54
REP 7.5 Low Paper Sensor ............................................................................................ 4-55
REP 7.6 Tray 1 Assembly / Paper Tray Assembly / Oversize Tray Assembly................ 4-55
REP 7.7 Tray 1 Front Snubber........................................................................................ 4-56
REP 7.8 Oversize Tray Front Snubber............................................................................ 4-56
Paper Feed
REP 8.1 Turn Roll ........................................................................................................... 4-59
REP 8.2 Feed Roll........................................................................................................... 4-60
REP 8.3 Feed Roll Assembly .......................................................................................... 4-61
REP 8.4 Turn Clutch ....................................................................................................... 4-62
REP 8.5 Feed Solenoid................................................................................................... 4-63
REP 8.6 Bypass Tray/Registration Assembly ................................................................. 4-64
REP 8.7 Bypass Tray Feed Assembly ............................................................................ 4-64
REP 8.8 Tray Housing..................................................................................................... 4-65
REP 8.9 Main Paper Handling Frame Assembly ............................................................ 4-65
REP 8.10 Lift Plate Sensor.............................................................................................. 4-66
REP 8.11 Lift Frame Assembly ....................................................................................... 4-66
REP 8.12 Tray Empty Sensor ......................................................................................... 4-67
REP 8.13 Pitch Sensor.................................................................................................... 4-67
REP 8.14 Stack Height Sensor ....................................................................................... 4-68
REP 8.15 Preregistration Clutch ..................................................................................... 4-69
REP 8.16 Preregistration Roll ......................................................................................... 4-69
REP 8.17 Registration Clutch.......................................................................................... 4-70
REP 8.18 Registration Rubber Roll................................................................................. 4-70
REP 8.19 Size Switch PWB ............................................................................................ 4-71
REP 8.20 Feeder Motor .................................................................................................. 4-72
REP 8.21 Feeder PWB ................................................................................................... 4-72

Xerox Phaser 790 Specifications

General

Brand	Xerox
Model	Phaser 790
Category	Copier
Language	English