ii
1.15 MEMORY.............................................................................................. 1-49
1.16 KEY COUNTER INSTALLATION.......................................................... 1-51
1.17 ANTI-CONDENSATION HEATER ........................................................ 1-53
1.18 TRAY HEATER..................................................................................... 1-54
1.19 TRAY HEATER (OPTIONAL PAPER TRAY UNIT) .............................. 1-55
1.20 TRAY HEATER (OPTIONAL LCT)........................................................ 1-57
2. PREVENTIVE MAINTENANCE ................................................... 2-1
2.1 MAIN UNIT ............................................................................................... 2-1
2.1.1 OVERVIEW...................................................................................... 2-1
2.1.2 PM TABLE ....................................................................................... 2-2
2.2 OPTIONAL UNIT PM TABLE.................................................................... 2-5
3. REPLACEMENT AND ADJUSTMENT........................................ 3-1
3.1 SPECIAL TOOLS................................................................................ 3-1
3.2 FILTERS ................................................................................................... 3-1
3.3 SCANNER UNIT ....................................................................................... 3-2
3.3.1 EXPOSURE GLASS ........................................................................ 3-2
3.3.2 APS SENSORS ............................................................................... 3-2
3.3.3 LENS BLOCK ASSEMBLY .............................................................. 3-3
3.3.4 EXPOSURE LAMP STABILIZER..................................................... 3-5
3.3.5 SCANNER LAMP............................................................................. 3-5
3.3.6 SCANNER I/O BOARD .................................................................... 3-7
3.3.7 SCANNER MOTOR ......................................................................... 3-7
3.3.8 FRONT SCANNER WIRE................................................................ 3-7
3.3.9 REAR SCANNER WIRE ................................................................ 3-10
3.4 LASER UNIT........................................................................................... 3-12
3.4.1 CAUTION DECAL LOCATION....................................................... 3-12
3.4.2 LASER UNIT.................................................................................. 3-13
Adjusting for Image Skew .................................................................. 3-15
D-Phase Adjustment .......................................................................... 3-16
Laser Beam Pitch Adjustment ............................................................ 3-17
3.4.3 POLYGONAL MIRROR MOTOR AND LSD................................... 3-18
3.5 DEVELOPMENT UNIT ........................................................................... 3-19
3.6 PHOTOCONDUCTOR UNIT (PCU)........................................................ 3-20
3.6.1 PCU ASSEMBLY ........................................................................... 3-20
3.6.2 WASTE TONER BOTTLES ........................................................... 3-21
3.6.3 CHARGE CORONA UNIT, GRID, WIRE, AND CLEANER ............ 3-22
3.6.4 CHARGE CORONA WIRE CLEANER MOTOR ............................ 3-23
3.6.5 OPC BELT CLEANING UNIT......................................................... 3-23
3.6.6 IMAGE TRANSFER BELT CLEANING UNIT................................. 3-23
3.7 PAPER TRANSFER UNIT ...................................................................... 3-24
3.7.1 VERTICAL TRANSPORT UNIT ..................................................... 3-24
3.7.2 TRANSFER ROLLER .................................................................... 3-24
3.8 FUSING/PAPER EXIT ............................................................................ 3-25
3.8.1 FUSING UNIT ................................................................................ 3-25
3.8.2 OIL SUPPLY UNIT......................................................................... 3-25
3.8.3 OIL SUPPLY PAD.......................................................................... 3-26
3.8.4 CLEANING ROLLER AND FUSING SPONGE ROLLER............... 3-26
