Ricoh C231 Service Manual page 30

3.8.4 2ND FEED TIMING SENSOR ........................................................3-36
3.8.5 REGISTRATION MOTOR ..............................................................3-37
3.8.6 REGISTRATION ROLLER .............................................................3-38
3.8.7 PRESS ROLLER RELEASE SOLENOIDS.....................................3-40
3.8.8 PRESS ROLLER RELEASE LEVER ADJUSTMENT .....................3-41
3.8.9 PRINTING PRESSURE ADJUSTMENT.........................................3-42
3.9 DRUM......................................................................................................3-43
3.9.1 PREPARATION ..............................................................................3-43
3.9.2 CLOTH SCREEN............................................................................3-43
Installation...........................................................................................3-44
3.9.3 CLAMPER / METAL SCREEN .......................................................3-46
Installation...........................................................................................3-47
3.9.4 INK PUMP UNIT .............................................................................3-48
3.9.5 INK ROLLER UNIT / INK ROLLER ONE-WAY CLUTCH ...............3-49
3.9.6 DOCTOR ROLLER GAP ADJUSTMENT .......................................3-51
3.9.7 INK DETECTION ADJUSTMENT ...................................................3-52
Using an Oscilloscope ........................................................................3-52
Simple Method ....................................................................................3-53
3.10 PAPER DELIVERY................................................................................3-54
3.10.1 PAPER DELIVERY UNIT .............................................................3-54
3.10.2 DELIVERY BELT / PAPER EXIT SENSOR / VACUUM
FAN MOTOR / PAPER DELIVERY UNIT BUSHINGS .................3-56
3.10.3 EXIT PAWL ADJUSTMENT .........................................................3-57
Clearance adjustment .........................................................................3-57
Timing adjustment...............................................................................3-58
3.11 MAIN DRIVE..........................................................................................3-60
3.11.1 MAIN MOTOR ..............................................................................3-60
3.11.2 MAIN DRIVE TIMING BELT ADJUSTMENT ................................3-63
3.11.3 MAIN MOTOR PULLEY POSITION..............................................3-64
3.12 FIRMWARE UPDATE (I/O ROM) ..........................................................3-65
3.13 SPECIAL TOOLS ............................................................................3-65
3.14 COLOR DRUM ......................................................................................3-66
3.14.1 INK PUMP ADJUSTMENT ...........................................................3-66
4. TROUBLESHOOTING ................................................................. 4-1
4.1 SERVICE CALL CODES ...........................................................................4-1
4.2 ELECTRICAL COMPONENT DEFECTS ..................................................4-3
4.2.1 DRUM...............................................................................................4-3
4.2.2 PAPER EJECT .................................................................................4-4
4.2.3 PAPER FEED ...................................................................................4-4
4.2.4 MAIN DRIVE.....................................................................................4-4
4.2.5 SCANNER ........................................................................................4-4
4.2.6 MASTER EJECT ..............................................................................4-5
4.2.7 MASTER MAKING UNIT ..................................................................4-5
4.2.8 OTHER .............................................................................................4-6
4.3 DIP SW, LED, VR, TP, AND FUSE TABLES.............................................4-7
4.3.1 TEST POINTS ..................................................................................4-7
MPU......................................................................................................4-7
4.3.2 POTENTIOMETERS ........................................................................4-7
C231/C237/C238/C248/C267
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SM