Ricoh LDD250, Service Manual

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C262/C265 ii SM
PREVENTIVE MAINTENANCE
2. PREVENTIVE MAINTENANCE.................................................... 2-1
2.1 MAINTENANCE TABLE ............................................................................2-1
REPLACEMENT AND ADJUSTMENT
3. REPLACEMENT AND ADJUSTMENT ........................................ 3-1
3.1 GENERAL CAUTION ................................................................................3-1
3.2 COVERS ...................................................................................................3-1
3.2.1 FRONT COVER, INNER COVER, KNOB COVER ...........................3-1
3.2.2 LEFT COVER, RIGHT FRONT AND RIGHT REAR COVERS,
REAR COVER..................................................................................3-2
3.2.3 OPERATION PANEL, LEFT SCANNER COVER, REAR UPPER COVER,
RIGHT SCANNER COVER, LOWER PANEL COVER.................................3-3
3.2.4 EXPOSURE GLASS, SCALES.........................................................3-4
3.3 SCANNER UNIT........................................................................................3-5
3.3.1 SCANNER FRAME, SCANNER HP SENSOR,
PLATEN COVER SENSOR, EXPOSURE LAMP .............................3-5
3.3.2 LENS COVER ..................................................................................3-6
3.3.3 ORIGINAL SIZE SENSORS .............................................................3-7
3.3.4 LAMP STABILIZER, SBU, SCANNER DRIVE MOTOR ...................3-8
3.3.5 SCANNER WIRES .........................................................................3-10
Installation...........................................................................................3-10
3.3.6 SBU (SENSOR BOARD UNIT) CALIBRATION..............................3-12
3.4 COPY IMAGE ADJUSTMENT.................................................................3-13
3.4.1 LEADING EDGE REGISTRATION ADJUSTMENT ........................3-13
3.4.2 SIDE-TO-SIDE REGISTRATION ADJUSTMENT...........................3-14
3.4.3 VERTICAL MAGNIFICATION ADJUSTMENT................................3-15
3.5 BOARDS .................................................................................................3-16
3.5.1 ACU AND ECU, PSU OPENING PROCEDURE ............................3-16
3.5.2 ACU, ECU, I/O................................................................................3-17
3.5.3 PSU ................................................................................................3-19
3.5.4 DOUBLE FEED DETECTOR BOARD ............................................3-20
3.5.5 ECU AND I/O REPLACEMENT, NVRAMS.....................................3-21
3.6 MASTER EJECT SECTION ....................................................................3-22
3.6.1 MASTER EJECT BOX....................................................................3-22
3.6.2 MASTER EJECT ROLLER UNIT, MASTER EJECT SENSOR ......3-23
3.6.3 MASTER EJECT DRIVE UNIT, SENSORS AND MOTORS ..........3-24
3.6.4 MASTER EJECT BOX LOCK SOLENOID......................................3-25
3.6.5 MASTER EJECT SENSOR ADJUSTMENT ...................................3-26
3.6.6 REASSEMBLING THE MASTER PICK-UP ROLLER
DRIVE GEARS ...............................................................................3-27
3.7 MASTER FEED SECTION ......................................................................3-28
3.7.1 MASTER MAKING UNIT ................................................................3-28
3.7.2 MASTER SET ROLLER, PLATEN ROLLER,
UPPER TENSION ROLLER ...........................................................3-30