Ricoh A229 Service Manual page 18

5.4.1 CAUTION DECAL LOCATIONS .................................................... 5-29
5.4.2 LD UNIT REPLACEMENT ............................................................. 5-30
5.4.3 LASER BEAM PITCH ADJUSTMENT ........................................... 5-31
5.4.4 POLYGON MIRROR MOTOR REPLACEMENT............................ 5-33
5.4.5 LASER SYNCHRONIZATION DETECTOR REPLACEMENT ....... 5-34
5.5 DRUM UNIT............................................................................................ 5-35
5.5.1 DRUM UNIT REMOVAL AND DRUM REPLACEMENT ................ 5-35
5.5.2 QUENCHING LAMP REPLACEMENT........................................... 5-36
5.5.3 GRID PLATE/CHARGE CORONA WIRE/WIRE CLEANER
REPLACEMENT ............................................................................ 5-37
5.5.4 DRUM ENTRANCE SEAL AND DRUM POTENTIAL SENSOR
REPLACEMENT ............................................................................ 5-39
5.5.5 CLEANING BLADE REPLACEMENT ............................................ 5-40
5.5.6 CLEANING BRUSH REPLACEMENT ........................................... 5-41
5.5.7 PICK-OFF PAWL REPLACEMENT ............................................... 5-42
5.5.8 OZONE FILTER REPLACEMENT ................................................. 5-43
5.5.9 DRUM MOTOR REPLACEMENT .................................................. 5-44
5.5.10 TONER OUTPUT AND RECYCLING PUMP UNIT
REPLACEMENT .......................................................................... 5-45
5.5.11 AIR PUMP AND TONER COLLECTION MOTOR
REPLACEMENT .......................................................................... 5-46
5.6 DEVELOPMENT AND TONER SUPPLY................................................ 5-47
5.6.1 DEVELOPMENT UNIT REMOVAL ................................................ 5-47
5.6.2 DEVELOPMENT AND AIR DUST FILTER REPLACEMENT......... 5-49
5.6.3 DEVELOPER REPLACEMENT ..................................................... 5-50
5.6.4 DEVELOPMENT ENTRANCE, FRONT,
AND REAR SIDE SEALS .............................................................. 5-52
5.6.5 TONER DENSITY SENSOR REPLACEMENT .............................. 5-53
5.6.6 TONER END SENSOR REPLACEMENT ...................................... 5-54
6.6.7 DEVELOPMENT MOTOR REPLACEMENT .................................. 5-54
5.7 TRANSFER BELT UNIT ......................................................................... 5-55
5.7.1 TRANSFER BELT UNIT REMOVAL/INSTALLATION.................... 5-55
Removal ............................................................................................. 5-55
Installation .......................................................................................... 5-55
5.7.2 TRANSFER BELT REPLACEMENT .............................................. 5-57
5.7.3 BIAS ROLLER CLEANING BLADE REPLACEMENT.................... 5-59
5.8 PAPER FEED ......................................................................................... 5-60
5.8.1 PAPER TRAY UNIT REMOVAL..................................................... 5-60
5.8.2 PAPER TRAY REMOVAL .............................................................. 5-61
Tandem Tray Removal....................................................................... 5-61
Universal Tray/Built-in LCT Removal ................................................. 5-62
5.8.3 PAPER FEED ROLLER REPLACEMENT ..................................... 5-63
5.8.4 TANDEM REAR FENCE DRIVE BELT REMOVAL........................ 5-64
5.8.5 TANDEM SIDE FENCE MOTOR REMOVAL................................. 5-66
5.8.6 3RD TRAY PAPER SENSOR REMOVAL...................................... 5-67
5.8.7 3RD TRAY LIFT WIRE REMOVAL ................................................ 5-68
5.8.8 PAPER FEED CLUTCH/RELAY CLUTCH REMOVAL .................. 5-70
5.8.9 BY-PASS FEED TABLE REMOVAL .............................................. 5-73
5.8.10 BY-PASS FEED ROLLER REPLACEMENT ................................ 5-74
A229 viii SM