Ricoh A-C4 - Page 8

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3.16.2 BY-PASS PAPER FEED AND PICK-UP
ROLLER REPLACEMENT ...........................................................3-71
3.16.3 BY-PASS SEPARATION ROLLER...............................................3-72
3.16.4 PAPER END SENSOR, PICK-UP SOLENOID.............................3-73
3.16.5 PAPER SIZE SENSOR BOARD REPLACEMENT .......................3-74
3.16.6 BY-PASS TABLE REMOVAL .......................................................3-75
3.16.7 PAPER FEED CLUTCH REPLACEMENT....................................3-76
3.17 DUPLEX UNIT.......................................................................................3-77
3.17.1 DUPLEX COVER REMOVAL .......................................................3-77
3.17.2 DUPLEX ENTRANCE SENSOR REPLACEMENT.......................3-78
3.17.3 DUPLEX EXIT SENSOR REPLACEMENT ..................................3-79
3.18 DRIVE AREA.........................................................................................3-80
3.18.1 REGISTRATION CLUTCH,
TRANSFER BELT CONTACT CLUTCH.......................................3-80
3.18.2 MAIN MOTOR ..............................................................................3-81
3.18.3 FUSING/EXIT MOTOR.................................................................3-82
3.18.4 TONER SUPPLY MOTOR............................................................3-83
3.19 PRINTED CIRCUIT BOARDS ...............................................................3-84
3.19.1 NVRAM.........................................................................................3-84
3.19.2 HIGH VOLTAGE POWER SUPPLY .............................................3-86
3.19.3 IOB ...............................................................................................3-87
IOB DIP Switch Settings (SW101) ......................................................3-88
3.19.4 BICU BOARD ...............................................................................3-89
3.19.5 PSU ..............................................................................................3-90
3.20 HDD, CONTROLLER BOARD...............................................................3-91
3.21 COPY ADJUSTMENTS: PRINTING/SCANNING ..................................3-92
3.21.1 PRINTING ....................................................................................3-92
Registration - Leading Edge/Side-to-Side...........................................3-92
Blank Margin.......................................................................................3-93
Main Scan Magnification.....................................................................3-93
Parallelogram Image Adjustment........................................................3-94
3.21.2 SCANNING...................................................................................3-95
Registration: Platen Mode...................................................................3-95
Magnification.......................................................................................3-95
3.21.3 ADF IMAGE ADJUSTMENT.........................................................3-96
Registration.........................................................................................3-96
3.21.4 TOUCH SCREEN CALIBRATION ................................................3-97
4. TROUBLESHOOTING ................................................................. 4-1
4.1 SERVICE CALL CONDITIONS .................................................................4-1
4.1.1 SUMMARY .......................................................................................4-1
4.1.2 SC CODE DESCRIPTIONS .............................................................4-2
4.1.3 SC CODE DESCRIPTIONS .............................................................4-3
4.2 ELECTRICAL COMPONENT DEFECTS ................................................4-30
4.2.1 SENSORS ......................................................................................4-30
4.2.2 SWITCHES.....................................................................................4-32
4.3 BLOWN FUSE CONDITIONS .................................................................4-32
4.4 LEDS .......................................................................................................4-33
4.5 TEST POINTS .........................................................................................4-33