Ricoh C231 Service Manual page 17

6.1 EXTERIOR COVER REMOVAL ................................................................6-1
6.1.1 ADF ..................................................................................................6-1
6.1.2 OPERATION PANEL........................................................................6-2
6.1.3 PLATEN COVER AND UPPER COVERS ........................................6-3
6.1.4 TOP COVER AND EXPOSURE GLASS ..........................................6-3
6.1.5 OTHER COVERS .............................................................................6-4
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
SM C231/C237/C238/C248/C267
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