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5. PREVENTIVE MAINTENANCE ................................................... 5-1
5.1 PM PROCEDURES .................................................................................. 5-1
5.1.1 PM-RELATED COUNTERS............................................................. 5-1
5.1.2 REGULAR PREVENTIVE MAINTENANCE FLOW DIAGRAM ........ 5-3
5.2 REGULAR PM ITEMS .............................................................................. 5-7
Regular PM Table ................................................................................ 5-7
6. REPLACEMENT AND ADJUSTMENT........................................ 6-1
6.1 COVERS, FANS, AND FILTERS.............................................................. 6-1
6.1.1 FRONT, INNER, AND INNER TRANSFER COVERS ..................... 6-1
6.1.2 REAR COVERS............................................................................... 6-2
6.1.3 RIGHT COVERS.............................................................................. 6-3
6.1.4 LEFT COVERS ................................................................................ 6-3
6.1.5 EXPOSURE GLASS ........................................................................ 6-4
6.1.6 OPERATION PANEL ....................................................................... 6-4
6.1.7 UPPER COVERS ............................................................................ 6-4
6.1.8 USED TONER TANK....................................................................... 6-5
6.1.9 CHARGE CORONA FAN FILTER ................................................... 6-5
6.1.10 MAIN EXHAUST FAN FILTER....................................................... 6-6
6.1.11 SCANNER EXHAUST FAN FILTER .............................................. 6-6
6.1.12 MAIN EXHAUST FAN.................................................................... 6-7
6.2 DRUM UNIT.............................................................................................. 6-8
6.2.1 PULLING OUT THE REVOLVER/DRUM DRAWER...................... 6-10
6.2.2 DRUM REPLACEMENT ................................................................ 6-12
6.2.3 CLEANING BLADE AND PCC WIRE REPLACEMENT................. 6-14
6.2.4 CLEANING BRUSH REPLACEMENT ........................................... 6-15
6.2.5 LUBRICANT BAR REPLACEMENT .............................................. 6-16
6.2.6 CHARGE CORONA GRID AND WIRE REPLACEMENT .............. 6-17
6.2.7 POTENTIAL SENSOR REPLACEMENT ....................................... 6-18
6.3 SCANNER UNIT..................................................................................... 6-19
6.3.1 EXPOSURE LAMP REPLACEMENT ............................................ 6-19
6.3.2 SBU REPLACEMENT.................................................................... 6-20
6.3.3 SCANNER IPU BOARD REPLACEMENT..................................... 6-21
6.3.4 SCANNER WIRE/SCANNER MOTOR REPLACEMENT .............. 6-22
6.3.5 APS SENSORS ............................................................................. 6-26
6.3.6 SCANNER HP SENSOR ............................................................... 6-27
6.4 COPY IMAGE ADJUSTMENT ................................................................ 6-28
6.4.1 PRINTER GAMMA ADJUSTMENT................................................ 6-28
Setting the KCMY standard values .................................................... 6-28
Gamma Data Print Out....................................................................... 6-28
KCMY color balance adjustment ........................................................ 6-28
Adjustment procedure ........................................................................ 6-29
Standard Copy Quality ....................................................................... 6-30
6.4.2 ACC TARGET ADJUSTMENT....................................................... 6-31
6.4.3 MAIN SCAN DOT POSITION CORRECTION ............................... 6-32
VII
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