Ricoh A231 Manuel d'entretien - Page 7

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6.1.4 ORIGINAL SIZE SENSORS ............................................................. 6-4
6.1.5 EXPOSURE LAMP............................................................................ 6-5
6.1.6 SCANNER H.P SENSOR/PLATEN COVER SENSOR .................... 6-6
6.1.7 SCANNER MOTOR .......................................................................... 6-7
6.1.8 SIB/LAMP STABILIZER .................................................................... 6-8
6.1.9 SCANNER WIRE .............................................................................. 6-9
6.1.10 SCANNER UNIT POSITIONING ADJUSTMENT ......................... 6-12
6.2 LASER UNIT ............................................................................................ 6-14
6.2.1 CAUTION DECAL LOCATIONS ..................................................... 6-14
6.2.2 LASER UNIT ................................................................................... 6-15
6.2.3 POLYGON MIRROR MOTOR ........................................................ 6-16
6.2.4 LASER SYNCHRONIZATION DETECTOR.................................... 6-17
6.2.5 LD UNIT........................................................................................... 6-17
Laser beam pitch adjustment .............................................................. 6-18
6.3 PHOTOCONDUCTOR UNIT (PCU)......................................................... 6-19
6.3.1 PCU ................................................................................................. 6-19
6.3.2 DRUM.............................................................................................. 6-20
6.3.3 PICK-OFF PAWLS .......................................................................... 6-21
6.3.4 CHARGE ROLLER/CHARGE ROLLER CLEANING PAD ............. 6-22
6.3.4a CHARGE ROLLER BRUSH REPLACEMENT PROCEDURE ..... 6-22
6.3.5 DRUM CLEANING BLADE ............................................................. 6-23
6.3.6 ID SENSOR..................................................................................... 6-23
6.4 DEVELOPMENT ...................................................................................... 6-24
6.4.1 DEVELOPMENT UNIT.................................................................... 6-24
6.4.2 DEVELOPMENT FILTER................................................................ 6-25
6.4.3 DEVELOPMENT ROLLER.............................................................. 6-25
6.4.4 DEVELOPER .................................................................................. 6-26
6.4.5 TD SENSOR ................................................................................... 6-27
6.5 TRANSFER UNIT..................................................................................... 6-28
6.5.1 TRANSFER BELT UNIT.................................................................. 6-28
6.5.2 TRANSFER BELT ........................................................................... 6-29
6.5.3 TRANSFER BELT CLEANING BLADE/TONER OVERFLOW
SENSOR ......................................................................................... 6-30
Transfer Belt Cleaning Blade .............................................................. 6-30
Toner Overflow Sensor........................................................................ 6-30
6.5.4 RIGHT COVER ............................................................................... 6-31
6.6 PAPER FEED........................................................................................... 6-32
6.6.1 PICK-UP, SEPARATION, AND FEED ROLLERS .......................... 6-32
6.6.2 LOWER RIGHT COVER/LOWER REAR COVER.......................... 6-32
6.6.3 RELAY/UPPER PAPER FEED/LOWER PAPER FEED
CLUTCHES ..................................................................................... 6-33
6.6.4 UPPER PAPER FEED UNIT........................................................... 6-34
6.6.5 LOWER PAPER FEED UNIT.......................................................... 6-35
6.6.6 PAPER END/PAPER HEIGHT/RELAY SENSORS........................ 6-36
6.6.7 REGISTRATION SENSOR ............................................................. 6-37
6.7 FUSING .................................................................................................... 6-39
6.7.1 FUSING UNIT ................................................................................. 6-39
6.7.2 HOT ROLLER STRIPPERS AND FUSING LAMP.......................... 6-40
6.7.3 THERMISTOR AND THERMOFUSE.............................................. 6-41
A230/A231/A232
vi
Rev. 02/2003
SM