Ricoh FW780 Service Manual page 312

4.6.9 PAPER FEED.................................................................................. *
4.6.10 ROLL FEEDER.............................................................................. *
4.6.11 OTHERS........................................................................................ *
4.6.12 AC DRIVE BOARD .......................................................................4-29
Service Remark for 220 ~ 240 V Version............................................4-29
Service Remarks for 120 V Version ....................................................4-30
REPLACEMENT AND ADJUSTMENT
5. REPLACEMENT AND ADJUSTMENT........................................ 5-1
5.1 EXTERIOR COVERS ............................................................................... *
5.1.1 LEFT SIDE COVER REMOVAL ...................................................... *
Left Upper Cover ................................................................................. *
Left Lower Cover.................................................................................. *
5.1.2 RIGHT SIDE COVER REMOVAL .................................................... *
Right Upper Cover ............................................................................... *
Right Lower Front, Right Lower Middle, and Right Lower
Rear Covers......................................................................................... *
5.1.3 REAR COVER REMOVAL .............................................................. *
Rear Cover .......................................................................................... *
5.2 OPTICS .................................................................................................... *
5.2.1 ORIGINAL FEED UNIT REMOVAL (A252 ONLY)........................... *
5.2.2 EXPOSURE GLASS REMOVAL (A252 ONLY)............................... *
5.2.3 EXPOSURE LAMP REMOVAL (A252 ONLY) ................................. *
5.2.4 FIBER OPTICS ARRAY REMOVAL (A252 ONLY).......................... *
5.2.5 LIGHT SENSOR REPLACEMENT (A252 ONLY)............................ *
5.2.6 SYNCHRO-CUT LENGTH ADJUSTMENT (A252 ONLY) ............... *
5.3 DEVELOPMENT ...................................................................................... *
5.3.1 DEVELOPMENT UNIT REMOVAL.................................................. *
5.3.2 DEVELOPER REMOVAL ................................................................ *
5.3.3 TONER DENSITY SENSOR REPLACEMENT................................ *
5.3.4 PTL REPLACEMENT ...................................................................... *
5.3.5 DEVELOPMENT BIAS VOLTAGE ADJUSTMENT ......................... *
Bias Voltage for Image Area ................................................................ *
Bias Voltage for Non-image Area ........................................................ *
5.4 DRUM UNIT ..............................................................................................5-1
5.4.1 DRUM UNIT REMOVAL .................................................................
5.4.2 DRUM REPLACEMENT ...................................................................5-1
5.4.3 CLEANING BLADE REPLACEMENT.............................................. *
5.4.4 CHARGE CORONA UNIT REMOVAL............................................. *
5.4.5 CHARGE CORONA WIRE REPLACEMENT .................................. *
5.4.6 PICK-OFF PAWL UNIT REMOVAL ................................................. *
5.4.7 GRID VOLTAGE ADJUSTMENT..................................................... *
5.4.8 DRUM CURRENT ADJUSTMENT .................................................. *
Charge Current Adjustment ................................................................. *
Transfer Current Adjustment................................................................ *
Separation Current Adjustment............................................................ *
B047/B048 iv
*
SM