Ricoh J-P3 Service Manual page 6

3. REPLACEMENT AND ADJUSTMENT........................................ 3-1
3.1 MODEL J-P3 AND MODEL J-P2 .............................................................. 3-1
3.2 SPECIAL TOOLS ..................................................................................... 3-1
3.3 LASER OPTICS........................................................................................ 3-2
3.3.1 CAUTION DECAL LOCATIONS ...................................................... 3-2
3.3.2 LASER OPTICS HOUSING UNIT.................................................... 3-3
3.3.3 POLYGON MIRROR MOTOR ......................................................... 3-7
3.3.4 POLYGON MIRROR MOTOR DRIVE BOARD................................ 3-8
3.3.5 LASER SYNCHRONIZING DETECTOR BOARDS ......................... 3-8
3.4 PAPER FEED ........................................................................................... 3-9
3.4.1 REGISTRATION SENSOR AND RELAY SENSORS ...................... 3-9
3.4.2 BY-PASS FEED CLUTCH ............................................................. 3-10
3.4.3 PAPER FEED MOTOR.................................................................. 3-10
3.5 TRANSFER AND PAPER TRANSPORT UNIT ...................................... 3-11
3.5.1 TRANSFER UNIT .......................................................................... 3-11
3.5.2 TRANSFER BELT CLEANING UNIT ............................................. 3-12
3.5.3 CLEANING BLADE AND CLEANING ROLLER............................. 3-12
3.5.4 TRANSFER UNIT DRIVE MOTOR ................................................ 3-14
3.6 ID SENSORS.......................................................................................... 3-15
3.7 FUSING .................................................................................................. 3-16
3.7.1 CLEANING UNIT ........................................................................... 3-16
3.7.2 PRESSURE ROLLER.................................................................... 3-17
3.7.3 FUSING UNIT FAN........................................................................ 3-19
3.8 ELECTRICAL COMPONENTS ............................................................... 3-20
3.8.1 CONTROLLER AND BCU ............................................................. 3-20
3.8.2 NVRAM REPLACEMENT PROCEDURE ...................................... 3-22
NVRAM on the BCU........................................................................... 3-22
NVRAM on the Controller................................................................... 3-23
NVRAMs on the BCU and Controller ................................................. 3-24
3.8.3 HIGH VOLTAGE SUPPLY BOARD ............................................... 3-25
3.8.4 CIRCUIT BREAKER AND PSU FAN ............................................. 3-26
3.8.5 CHOKE COIL................................................................................. 3-26
3.8.6 DEVELOPMENT DRIVE MOTOR-K .............................................. 3-27
3.8.7 WASTE TONER VIBRATOR ......................................................... 3-28
4. TROUBLESHOOTING................................................................. 4-1
4.1 MODEL J-P3 AND MODEL J-P2 .............................................................. 4-1
4.2 PROCESS CONTROL ERROR CONDITIONS ........................................ 4-1
4.2.1 DEVELOPER INITIALIZATION RESULT......................................... 4-1
4.2.2 PROCESS CONTROL SELF-CHECK RESULT .............................. 4-2
4.2.3 LINE POSITION ADJUSTMENT RESULT....................................... 4-3
SC Code Classification ........................................................................ 4-4
4.3 SC TABLE ................................................................................................ 4-5
4.4 TROUBLESHOOTING GUIDE ............................................................... 4-15
4.4.1 IMAGE QUALITY ........................................................................... 4-15
4.4.2 COLOR SHIFT............................................................................... 4-16
Adjustment Standard.......................................................................... 4-18
Preparation......................................................................................... 4-18
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