Ricoh B205 Service Manual page 15

3.5.5 EXPOSURE LAMP ...........................................................................3-8
3.5.6 SCANNER MOTOR/LAMP STABILIZER..........................................3-9
3.5.7 SCANNER WIRES .........................................................................3-10
3.6 LASER UNIT ...........................................................................................3-13
3.6.1 CAUTION DECAL LOCATIONS .....................................................3-13
3.6.2 LASER UNIT...................................................................................3-14
3.6.3 POLYGON MIRROR MOTOR ........................................................3-15
3.6.4 LD UNIT..........................................................................................3-16
3.6.5 LASER SYNCHRONIZATION DETECTOR....................................3-17
3.7 PHOTOCONDUCTOR UNIT (PCU) ........................................................3-18
3.7.1 PCU REMOVAL..............................................................................3-18
3.7.2 PICK-OFF PAWLS .........................................................................3-19
3.7.3 OPC DRUM ....................................................................................3-20
3.7.4 CHARGE ROLLER, CLEANING ROLLER .....................................3-21
3.7.5 CLEANING BLADE.........................................................................3-22
3.7.6 DEVELOPER..................................................................................3-23
3.7.7 AFTER REPLACEMENT OF PCU COMPONENTS .......................3-27
3.8 TRANSFER UNIT ....................................................................................3-28
3.8.1 TRANSFER ROLLER UNIT............................................................3-28
3.8.2 IMAGE DENSITY SENSOR............................................................3-29
3.9 FUSING/EXIT ..........................................................................................3-30
3.9.1 FUSING UNIT.................................................................................3-30
3.9.2 THERMISTORS..............................................................................3-30
3.9.3 THERMOSTATS.............................................................................3-31
3.9.4 HOT ROLLER AND FUSING LAMP ...............................................3-33
3.9.5 PRESSURE ROLLER/CLEANING ROLLER ..................................3-35
3.9.6 PAPER EXIT SENSOR/PAPER OVERFLOW SENSOR................3-36
3.10 PAPER FEED........................................................................................3-37
3.10.1 FEED ROLLER: TRAY 1 ..............................................................3-37
3.10.2 FEED ROLLER: TRAY 2 ..............................................................3-38
3.10.3 PAPER END SENSOR.................................................................3-39
3.10.4 PAPER TRAY LIFT MOTORS ......................................................3-40
3.10.5 REGISTRATION CLUTCH ...........................................................3-41
3.10.6 PAPER FEED CLUTCHES...........................................................3-42
Lower Paper Feed Clutch ...................................................................3-42
Upper Paper Feed Clutch. ..................................................................3-42
3.10.7 RELAY CLUTCHES......................................................................3-43
3.10.8 PAPER SIZE DETECTOR ............................................................3-44
3.10.9 REGISTRATION SENSOR...........................................................3-45
3.10.10 RELAY SENSORS .....................................................................3-46
Upper Relay Sensor............................................................................3-46
Lower Relay Sensor............................................................................3-46
3.10.11 DUST COLLECTION BOX..........................................................3-47
3.11 PCBS AND OTHER ITEMS...................................................................3-48
3.11.1 CONTROLLER BOARD ...............................................................3-48
3.11.2 NVRAM.........................................................................................3-49
3.11.3 SBCU BOARD ..............................................................................3-50
3.11.4 POWER PACK .............................................................................3-51
3.11.5 MAIN MOTOR ..............................................................................3-52
SM iii B205/B209/D007/D008