iv
3.12.3 IMB (MEMORY BOARD) ..............................................................3-45
3.12.4 BICU (BASE-ENGINE IMAGE CONTROL UNIT) .........................3-45
3.12.5 IOB (I/O BOARD)..........................................................................3-46
3.12.6 MAIN MOTOR ..............................................................................3-46
3.12.7 REAR EXHAUST FAN..................................................................3-46
3.12.8 LEFT EXHAUST FAN...................................................................3-47
3.12.9 PSU (POWER SUPPLY UNIT) .....................................................3-47
3.12.10 GEARBOX ..................................................................................3-48
Replacement Procedure .....................................................................3-48
Gear Arrangement Within the Gearbox...............................................3-49
3.13 COPY ADJUSTMENTS: PRINTING/SCANNING ..................................3-50
3.13.1 PRINTING ....................................................................................3-50
Registration - Leading Edge/Side-to-Side...........................................3-50
Blank Margin .......................................................................................3-51
Main Scan Magnification.....................................................................3-51
3.13.2 SCANNING...................................................................................3-52
Registration: Platen Mode...................................................................3-52
Magnification.......................................................................................3-53
Standard White Density Adjustment ...................................................3-54
3.13.3 ADF IMAGE ADJUSTMENT .........................................................3-55
Registration and Blank Margin ............................................................3-55
Sub-scan Magnification.......................................................................3-55
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
4.2 ELECTRICAL COMPONENT DEFECTS ..................................................4-8
4.2.1 SENSORS ........................................................................................4-8
4.2.2 SWITCHES.......................................................................................4-9
4.3 BLOWN FUSE CONDITIONS .................................................................4-10
4.4 LED DISPLAY .........................................................................................4-10
4.4.1 BICU ...............................................................................................4-10
4.4.2 IOB .................................................................................................4-10
5 SERVICE TABLES....................................................................... 5-1
5.1 USING SERVICE PROGRAM MODES .....................................................5-1
Accessing SP Modes ............................................................................5-1
Accessing Copy Mode from within an SP Mode ...................................5-1
How to Select a Program Number ........................................................5-2
To Input a Value or Setting for an SP Mode .........................................5-2
5.1.1 SP MODE TABLES ..........................................................................5-3
SP1-XXX (Feed) ...................................................................................5-3
SP2-XXX (Drum)...................................................................................5-6
SP4-XXX (Scanner) ............................................................................5-11
SP5-XXX (Mode) ................................................................................5-17
SP6-XXX (Peripherals) .......................................................................5-24
SP7-XXX (Data Log)...........................................................................5-26
5.1.2 TEST PATTERN PRINTING (SP5-902) .........................................5-31
