Ricoh B039 Service Manual page 13

3.5.4 LD UNIT..........................................................................................3-20
3.5.5 POLYGONAL MIRROR MOTOR....................................................3-20
3.5.6 LASER UNIT ALIGNMENT ADJUSTMENT....................................3-21
3.6 PCU SECTION ........................................................................................3-22
3.6.1 PCU ................................................................................................3-22
3.6.2 PICK-OFF PAWLS .........................................................................3-22
3.6.3 TONER DENSITY SENSOR ..........................................................3-22
3.6.4 OPC DRUM ....................................................................................3-23
3.6.5 CHARGE ROLLER AND CLEANING BRUSH................................3-24
3.6.6 CLEANING BLADE.........................................................................3-24
3.6.7 DEVELOPER..................................................................................3-25
3.6.8 AFTER REPLACEMENT OR ADJUSTMENT.................................3-26
3.7 TONER SUPPLY MOTOR ......................................................................3-27
3.8 PAPER FEED SECTION.........................................................................3-28
3.8.1 PAPER FEED ROLLER..................................................................3-28
3.8.2 FRICTION PAD ..............................................................................3-28
3.8.3 PAPER END SENSOR...................................................................3-28
3.8.4 EXIT SENSOR ...............................................................................3-29
Non-duplex Models .............................................................................3-29
Duplex Models ....................................................................................3-29
3.8.5 BY-PASS FEED ROLLER AND
BY-PASS PAPER END SENSOR ..................................................3-30
3.8.6 REGISTRATION ROLLER .............................................................3-31
3.8.7 BY-PASS PAPER SIZE SENSOR ..................................................3-32
3.8.8 REGISTRATION CLUTCH .............................................................3-32
3.8.9 REGISTRATION SENSOR.............................................................3-33
3.8.10 UPPER PAPER FEED CLUTCH AND
BY-PASS FEED CLUTCH ............................................................3-33
3.8.11 RELAY CLUTCH ..........................................................................3-34
3.8.12 RELAY SENSOR..........................................................................3-34
3.8.13 LOWER PAPER FEED CLUTCH
(TWO-TRAY MODELS ONLY) .....................................................3-34
3.8.14 VERTICAL TRANSPORT SENSOR
(TWO-TRAY MODELS ONLY) .....................................................3-35
3.8.15 PAPER SIZE SWITCH .................................................................3-35
3.9 IMAGE TRANSFER.................................................................................3-36
3.9.1 IMAGE TRANSFER ROLLER ........................................................3-36
3.9.2 IMAGE DENSITY SENSOR ...........................................................3-36
3.10 FUSING .................................................................................................3-37
3.10.1 FUSING UNIT...............................................................................3-37
3.10.2 THERMISTOR..............................................................................3-37
3.10.3 FUSING LAMP .............................................................................3-38
3.10.4 HOT ROLLER...............................................................................3-38
3.10.5 THERMOFUSE AND THERMOSTAT ..........................................3-39
3.10.6 HOT ROLLER STRIPPER PAWLS ..............................................3-39
3.10.7 PRESSURE ROLLER AND BUSHINGS ......................................3-40
3.10.8 NIP BAND WIDTH ADJUSTMENT ...............................................3-41
3.11 DUPLEX UNIT (DUPLEX MODELS ONLY) ..........................................3-42
3.11.1 DUPLEX EXIT SENSOR ..............................................................3-42
SM iii B039/B040/B043