Ricoh D131 Service Manual page 11

Scanner Wire Removal ...................................................................... 4-25
Scanner Wire Reinstallation and Scanner Position Adjustment ......... 4-26
4.5 LASER UNIT ............................................................................................ 4-28
4.5.1 CAUTION DECALS ........................................................................ 4-28
4.5.2 LD UNIT, POLYGON MOTOR AND POLYGON MOTOR DRIVE BOARD
4-29
SP Adjustments .................................................................................. 4-30
4.5.3 LASER SYNCHRONIZATION DETECTOR REPLACEMENT ........ 4-31
4.5.4 LASER UNIT ALIGNMENT ............................................................. 4-32
4.6 DRUM UNIT ............................................................................................. 4-34
4.6.1 DEVELOPMENT UNIT REMOVAL ................................................. 4-34
Drum Removal ................................................................................... 4-34
Drum Re-installation ........................................................................... 4-36
Replacement with a Used Development Unit ..................................... 4-37
4.6.2 CHARGE CORONA UNIT .............................................................. 4-38
4.6.3 CHARGE CORONA WIRE, GRID, CLEANING PAD ...................... 4-38
4.6.4 OPC DRUM REMOVAL .................................................................. 4-40
Dusting the Drum Surface .................................................................. 4-41
4.6.5 PTL ................................................................................................. 4-42
4.6.6 QUENCHING LAMP ....................................................................... 4-43
4.6.7 DRUM POTENTIAL SENSOR ........................................................ 4-43
4.6.8 CLEANING FILTER ........................................................................ 4-44
4.6.9 CLEANING BLADE ......................................................................... 4-44
4.6.10 CLEANING BRUSH .................................................................... 4-45
4.6.11 PICK-OFF PAWLS ..................................................................... 4-46
4.6.12 ID SENSOR ................................................................................ 4-47
4.6.13 DRUM MOTOR ........................................................................... 4-48
4.6.14 TONER COLLECTION BOTTLE ................................................ 4-49
4.6.15 TONER SEPARATION UNIT ...................................................... 4-50
4.6.16 OZONE FILTERS ....................................................................... 4-51
4.6.17 OPTICS DUST FILTER .............................................................. 4-52
4.6.18 INTERNAL DUST FILTER .......................................................... 4-52
4.6.19 TONER COOLING FAN.............................................................. 4-53
4.7 DEVELOPMENT UNIT............................................................................. 4-54
4.7.1 DEVELOPER REPLACEMENT ...................................................... 4-54
Preparation ......................................................................................... 4-54
Removal ............................................................................................. 4-54
Reinstallation ...................................................................................... 4-56
SM vii D131/D132/D133