Ricoh A250 Service Manual page 7

6.6.9 BY-PASS FEED PAPER WIDTH SENSOR REMOVAL................. 6-31
6.6.10 REGISTRATION ROLLER REMOVAL ........................................ 6-32
6.6.11 REGISTRATION SENSOR REPLACEMENT .............................. 6-33
6.6.12 TONER END SENSOR REPLACEMENT .................................... 6-34
6.7 OTHERS................................................................................................. 6-35
6.7.1 MAIN MOTOR/GEAR BOX REPLACEMENT ................................ 6-35
6.7.2 IOB (INPUT OUTPUT BOARD) REPLACEMENT ......................... 6-36
6.7.3 BICU (BASE-ENGINE IMAGE CONTROL UNIT)
REPLACEMENT ............................................................................ 6-37
6.7.4 POWER SUPPLY UNIT AND B/C/T POWER PACK
REPLACEMENT ............................................................................ 6-38
6.8 STANDARD WHITE DENSITY ADJUSTMENT ...................................... 6-39
6.9 COPY ADJUSTMENT PRINTING/SCANNING....................................... 6-40
6.9.1 PRINTING...................................................................................... 6-40
6.9.2 SCANNING .................................................................................... 6-42
6.9.3 ADF IMAGE ADJUSTMENT .......................................................... 6-44
TROUBLESHOOTING
7. TROUBLESHOOTING................................................................. 7-1
7.1 SERVICE CALL CONDITIONS................................................................. 7-1
7.1.1 SUMMARY....................................................................................... 7-1
7.1.2 SC CODE DESCRIPTIONS............................................................. 7-2
7.2 BLOWN FUSE TABLE............................................................................ 7-10
7.3 ELECTRICAL COMPONENT DEFECTS................................................ 7-10
7.3.1 SWITCHES .................................................................................... 7-10
7.3.2 SENSORS ..................................................................................... 7-11
7.4 COPY QUALITY ..................................................................................... 7-12
7.4.1 LOW IMAGE DENSITY.................................................................. 7-12
7.5 FIRMWARE HISTORY ........................................................................... 7-14
7.5.1 A250 FIRMWARE MODIFICATION HISTORY .............................. 7-14
DOCUMENT FEEDER A859
1. OVERALL INFORMATION.......................................................... 8-1
1.1 SPECIFICATIONS .................................................................................... 8-1
1.2 MECHANICAL COMPONENT LAYOUT................................................... 8-2
1.3 ELECTRICAL COMPONENT LAYOUT .................................................... 8-3
1.4 ELECTRICAL COMPONENT DESCRIPTION .......................................... 8-4
1.5 DRIVE LAYOUT........................................................................................ 8-5
2. DETAILED SECTION DESCRIPTIONS....................................... 8-6
2.1 ORIGINAL SIZE DETECTION .................................................................. 8-6
1.2 PICK-UP AND SEPARATION................................................................... 8-8
1.3 ORIGINAL TRANSPORT AND EXIT MECHANISM ................................. 8-9
1.4 STAMP ................................................................................................... 8-10
SM v
Rev. 05/2000
A250