Table Of Contents - Xerox DocuMate 252 Service Manual

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Contents
1. INTRODUCTION........................................................................................................................... 1-1
1.1 G
ENERAL NOTES FOR SERVICING
1.2 G D
ENERAL
1.3 B S
ASIC PECIFICATIONS
2. UNPACKING, INSTALLATION, AND TRANSPORTATION.............................................. 2-1
2.1 P
RECAUTIONS OF
2.2 U
NPACKING
2.3 I
NSTALLATION
2.3.1 Installing the ADF Paper Tray............................................................................ 2-3
2.3.2 Installing the ADF Output Paper Tray .............................................................. 2-4
2.3.3 Connecting the Cables......................................................................................... 2-5
2.3.4 Turning on the Power .......................................................................................... 2-5
2.4 P
LACING THE ORIGINAL
3. THEORY OF OPERATION .......................................................................................................... 3-1
3.1 I
NTRODUCTION
3.2 M
AIN CONTROL UNIT
3.2.1 System diagram.................................................................................................... 3-2
3.2.2 Main control circuit............................................................................................... 3-3
3.2.3 Video circuit: ......................................................................................................... 3-4
3.2.4 LED and Push Button Module Circuit................................................................ 3-6
3.2.5 Sensor input .......................................................................................................... 3-7
3.2.6 Sub power supply circuit..................................................................................... 3-8
3.2.7 Power supply ......................................................................................................... 3-9
4. PROBLEM SOLVING.................................................................................................................... 4-1
4.1 D
IAGNOSTICS
4.1.1 Online diagnostics ................................................................................................ 4-1
4.1.2 Offline diagnostics ................................................................................................ 4-2
4.1.3 Diagnostic flowcharts........................................................................................... 4-3
4.2 T
ROUBLESHOOTING
4.2.1 Flowcharts .............................................................................................................. 4-6
4.2.2 Tables...................................................................................................................... 4-9
5. DISASSEMBLY .............................................................................................................................. 5-1
5.1 S T
ERVICE
5.2 C
LEANING THE
5.3 C
LEANING THE
5.4 P
ROCEDURE FOR DISASSEMBLY AND REASSEMBLY
5.4.1 Notes on disassembly.......................................................................................... 5-4
5.4.2 Removing the Upper Housing ............................................................................ 5-5
5.4.3 Removing the Upper Optical Assembly............................................................ 5-7
5.4.4 Removing the Upper Optical Chassis ............................................................... 5-9
5.4.5 Removing the Lamp in Upper Optical Assembly.......................................... 5-10
.............................................................................................. 1-1
ESCRIPTION
........................................................................................................... 1-2
........................................................................................................... 1-2
I
NSTALLATION
.............................................................................................. 2-1
P
ROCEDURE
.......................................................................................................... 2-1
......................................................................................................................... 2-3
........................................................................................................... 2-6
........................................................................................................................ 3-1
................................................................................................................ 3-2
.......................................................................................................................... 4-1
................................................................................................................. 4-6
OOL
......................................................................................................................... 5-1
ADF ................................................................................................................ 5-2
C A
ALIBRATION REA
.......................................................................................... 5-3
.................................................................... 5-4
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