Ricoh JP3000, Service Manual, Page: 29 / 693

xvii
SM C231/C237/C238/C248/C267
3.3.2 PSU ..................................................................................................3-5
PSU board ............................................................................................3-5
PSU board with bracket ........................................................................3-5
3.4 SCANNER .................................................................................................3-6
3.4.1 EXPOSURE GLASS/DF EXPOSURE GLASS, SCALES .................3-6
Exposure Glass ....................................................................................3-6
DF Exposure Glass...............................................................................3-6
3.4.2 LENS BLOCK ...................................................................................3-7
3.4.3 EXPOSURE LAMP, LAMP STABILIZER BOARD ............................3-8
3.4.4 SCANNER MOTOR..........................................................................3-9
3.4.5 SCANNER HOME POSITION SENSOR ..........................................3-9
3.4.6 PLATEN COVER SENSOR............................................................3-10
3.4.7 ADJUSTING THE SCANNER POSITION.......................................3-11
Overview.............................................................................................3-11
Adjusting the Belt Contact Points for the First Scanner ......................3-12
Adjusting the Belt Contact Points for the Second Scanner .................3-13
3.5 MASTER FEED .......................................................................................3-15
3.5.1 MASTER MAKING UNIT ................................................................3-15
3.5.2 MASTER MAKING UNIT SET SWITCHES ....................................3-15
3.5.3 THERMAL HEAD............................................................................3-17
Installation...........................................................................................3-18
3.5.4 MASTER SET COVER SENSOR ...................................................3-19
3.5.5 MASTER END SENSOR ................................................................3-19
3.5.6 CUTTER UNIT................................................................................3-20
3.5.7 THERMAL HEAD VOLTAGE ADJUSTMENT.................................3-21
3.5.8 MASTER END SENSOR ADJUSTMENT .......................................3-22
3.6 MASTER EJECT .....................................................................................3-23
3.6.1 MASTER EJECT UNIT ...................................................................3-23
3.6.2 MASTER EJECT ROLLERS...........................................................3-24
3.6.3 MASTER EJECT MOTOR / PRESSURE PLATE MOTOR.............3-24
3.6.4 DRUM MASTER SENSOR / MASTER EJECT SENSOR /
EJECT BOX SET SENSOR............................................................3-25
3.6.5 PRESSURE PLATE HP SENSOR / PRESSURE
PLATE LIMIT SENSOR ..................................................................3-26
3.6.6 AIR KNIFE FAN MOTOR................................................................3-26
3.6.7 MASTER EJECT POSITION SENSOR ..........................................3-27
3.6.8 MASTER CLAMPER OPENING UNIT............................................3-27
3.7 PAPER FEED..........................................................................................3-28
3.7.1 PICK-UP ROLLER / PAPER FEED ROLLER / FRICTION PAD.....3-28
3.7.2 PAPER TABLE LOWER LIMIT SENSOR.......................................3-29
3.7.3 PAPER HEIGHT SENSOR 1 / 2.....................................................3-30
3.7.4 PAPER END SENSOR...................................................................3-31
3.7.5 PAPER TABLE MOTOR.................................................................3-32
3.7.6 PAPER FEED CLUTCH .................................................................3-32
3.7.7 PAPER SEPARATION PRESSURE ADJUSTMENT......................3-33
3.8 PRINTING ...............................................................................................3-34
3.8.1 PRESS ROLLER ............................................................................3-34
3.8.2 REGISTRATION SENSOR.............................................................3-35
3.8.3 FEED START TIMING SENSOR....................................................3-35