Ricoh B089 Service Manual page 18

REPLACEMENT AND ADJUSTMENT
6. REPLACEMENT AND ADJUSTMENT ........................................ 6-1
6.1 SCANNER UNIT........................................................................................6-1
6.1.1 EXPOSURE GLASS.........................................................................6-1
6.1.2 SCANNER EXTERIOR/OPERATION PANEL ..................................6-2
6.1.3 LENS BLOCK ASSEMBLY...............................................................6-3
6.1.4 ORIGINAL SIZE SENSORS .............................................................6-4
6.1.5 EXPOSURE LAMP ...........................................................................6-5
6.1.6 SCANNER MOTOR/LAMP STABILIZER..........................................6-6
6.1.7 SCANNER WIRES ...........................................................................6-7
6.2 LASER UNIT ...........................................................................................6-10
6.2.1 CAUTION DECAL LOCATIONS .....................................................6-10
6.2.2 LASER UNIT ..................................................................................6-11
6.2.3 POLYGON MIRROR MOTOR ........................................................6-12
6.2.4 LD UNIT..........................................................................................6-12
6.2.5 LASER SYNCHRONIZATION DETECTOR....................................6-13
6.3 PHOTOCONDUCTOR UNIT (PCU) ........................................................6-14
6.3.1 PCU ................................................................................................6-14
6.4 TRANSFER UNIT....................................................................................6-15
6.4.1 TRANSFER ROLLER UNIT............................................................6-15
6.4.2 IMAGE DENSITY SENSOR ...........................................................6-16
6.5 FUSING/EXIT ..........................................................................................6-17
6.5.1 FUSING UNIT.................................................................................6-17
6.5.2 THERMISTORS..............................................................................6-17
6.5.3 THERMOFUSE ..............................................................................6-18
6.5.4 HOT ROLLER AND FUSING LAMP ...............................................6-20
6.5.5 PRESSURE ROLLER/CLEANING ROLLER .................................6-21
6.5.6 PAPER EXIT SENSOR/PAPER OVERFLOW SENSOR................6-22
6.6 PAPER FEED..........................................................................................6-23
6.6.1 FEED ROLLERS: TRAY 1..............................................................6-23
6.6.2 FEED ROLLER: TRAY 2 ................................................................6-24
6.6.3 PAPER END SENSOR...................................................................6-25
6.6.4 PAPER TRAY LIFT MOTORS ........................................................6-26
6.6.5 REGISTRATION CLUTCH .............................................................6-27
6.6.6 PAPER FEED CLUTCHES.............................................................6-28
6.6.7 RELAY CLUTCHES........................................................................6-29
6.6.8 PAPER SIZE DETECTOR..............................................................6-30
6.6.9 REGISTRATION SENSOR.............................................................6-31
6.6.10 RELAY SENSORS .......................................................................6-32
6.7 PCBS AND OTHER ITEMS.....................................................................6-33
6.7.1 CONTROLLER BOARD .................................................................6-33
6.7.2 SBCU BOARD ................................................................................6-34
6.7.3 POWER PACK ...............................................................................6-34
6.7.4 MAIN MOTOR ................................................................................6-35
6.7.5 PSU ................................................................................................6-36
6.8 COPY ADJUSTMENTS: PRINTING/SCANNING ....................................6-37
6.8.1 PRINTING ......................................................................................6-37
B089/B093 vi SM