Ricoh C231 Service Manual page 15

6.2 COPY IMAGE ADJUSTMENT .................................................................. 6-6
6.2.1 LEADING EDGE REGISTRATION ADJUSTMENT ......................... 6-6
6.2.2 SIDE-TO-SIDE REGISTRAION ADJUSTMENT .............................. 6-7
6.2.3 VERTICAL MAGNIFICATION ADJUSTMENT ................................. 6-8
6.2.4 LEADING EDGE BLANK MARGIN ADJUSTMENT ......................... 6-9
6.3 MPU REPLACEMENT ............................................................................ 6-10
6.4 ORIGINAL FEED SECTION ................................................................... 6-11
6.4.1 ADF ROLLER ASSSEMBLY.......................................................... 6-11
6.4.2 PICK-UP ROLLER ......................................................................... 6-11
6.4.3 FEED ROLLER .............................................................................. 6-12
6.4.4 SEPARATION ROLLER ................................................................ 6-12
6.4.5 ADF MOTOR AND COVERS......................................................... 6-13
6.4.6 R0 AND R1 ROLLERS .................................................................. 6-13
6.4.7 R2 ROLLER ................................................................................... 6-14
6.4.8 DOCUMENT SENSOR .................................................................. 6-15
6.4.9 SCAN LINE SENSOR.................................................................... 6-15
6.4.10 COVER SENSORS...................................................................... 6-16
6.5 MASTER FEED SECTION ..................................................................... 6-17
6.5.1 MASTER MAKING UNIT REMOVAL ............................................. 6-17
6.5.2 THERMAL HEAD REMOVAL ........................................................ 6-19
Remarks for thermal head installation................................................ 6-20
6.5.3 THERMAL HEAD VOLTAGE ADJUSTMENT ................................ 6-21
6.5.4 MASTER END SENSOR ADJUSTMENT ...................................... 6-23
6.6 MASTER EJECT SECTION.................................................................... 6-24
6.6.1 MASTER EJECT UNIT REMOVAL................................................ 6-24
6.7 PAPER FEED SECTION ........................................................................ 6-25
6.7.1 PAPER FEED ROLLER, PICK-UP ROLLER,
AND FRICTION PAD.................................................................... 6-25
6.7.2 PAPER SEPARATION PRESSURE ADJUSTMENT ..................... 6-26
6.7.3 PAPER FEED PRESSURE ADJUSTMENT .................................. 6-27
6.7.4 REGISTRATION ROLLER CLEARANCE ADJUSTMENT ............. 6-28
6.8 PRINTING SECTION.............................................................................. 6-29
6.8.1 PRESS ROLLER REMOVAL ......................................................... 6-29
6.8.2 PRESS ROLLER LOCK LEVER ADJUSTMENT ........................... 6-30
6.8.3 PRINTING PRESSURE ADJUSTMENT ........................................ 6-32
6.9 DRUM AND DRIVE SECTION................................................................ 6-33
6.9.1 DRUM CLOTH SCREEN REMOVAL............................................. 6-33
Remarks for the cloth screen installation ........................................... 6-34
6.9.2 DRUM MASTER CLAMPER AND METAL SCREEN REMOVAL .. 6-36
Remarks for drum screen installation................................................. 6-38
6.9.3 INK ROLLER UNIT REMOVAL...................................................... 6-39
6.9.4 DOCTOR ROLLER GAP ADJUSTMENT ...................................... 6-41
6.9.5 INK DETECTION ADJUSTMENT .................................................. 6-43
6.9.6 INK PUMP REMOVAL AND PLUNGER
POSITION ADJUSTMENT............................................................. 6-44
6.9.7 MAIN DRIVE TIMING BELT TENSION ADJUSTMENT................. 6-46
6.9.8 MAIN MOTOR PULLEY POSITION ADJUSTMENT...................... 6-48
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