Ricoh M080, Service Manual

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M080 ii SM
REPLACEMENT AND ADJUSTMENT
4. REPLACEMENT AND ADJUSTMENT ........................................ 4-1
4.1 GENERAL .................................................................................................. 4-1
4.1.1 PRECAUTIONS ON DISASSEMBLY ............................................... 4-1
4.1.2 RELEASING PLASTIC LATCHES .................................................... 4-2
4.1.3 AFTER SERVICING THE MACHINE ................................................ 4-2
4.2 SPECIAL TOOLS ....................................................................................... 4-3
4.3 COVERS .................................................................................................... 4-4
4.3.1 UPPER COVER ................................................................................ 4-4
4.3.2 LEFT COVER ................................................................................... 4-5
4.3.3 BY-PASS TRAY UNIT ...................................................................... 4-5
4.3.4 FRONT COVER ................................................................................ 4-6
4.3.5 RIGHT COVER ................................................................................. 4-6
4.4 LASER UNIT .............................................................................................. 4-7
4.4.1 CAUTION DECAL LOCATIONS ....................................................... 4-7
4.4.2 POLYGON MIRROR MOTOR .......................................................... 4-8
4.4.3 LASER SYNCHRONIZATION DETECTOR ...................................... 4-9
4.4.4 LASER UNIT ..................................................................................... 4-9
4.4.5 LASER DIODE UNIT ...................................................................... 4-10
4.4.6 LASER BEAM PITCH ADJUSTMENT ............................................ 4-11
4.5 TRANSFER ROLLER .............................................................................. 4-13
4.6 TONER END SENSOR ............................................................................ 4-14
4.7 FUSING ................................................................................................... 4-15
4.7.1 FUSING UNIT ................................................................................. 4-15
4.7.2 HOT ROLLER AND FUSING LAMP ............................................... 4-16
4.7.3 PRESSURE ROLLER ..................................................................... 4-18
4.7.4 THERMISTOR AND THERMOSTAT .............................................. 4-19
4.7.5 HOT ROLLER STRIPPERS ............................................................ 4-20
4.8 PAPER FEED .......................................................................................... 4-21
4.8.1 PAPER FEED ROLLER .................................................................. 4-21
4.8.2 FRICTION PAD .............................................................................. 4-22
4.9 BY-PASS TRAY ....................................................................................... 4-23
4.10 PRINTER CONTROLLER BOARD .................................................... 4-24
4.11 ENGINE BOARD ................................................................................ 4-25
4.12 MAIN MOTOR .................................................................................... 4-26
4.13 CLUTCHES ........................................................................................ 4-27