iii
4.3 NCU PARAMETERS .............................................................................. 4-42
4.4 DEDICATED TRANSMISSION PARAMETERS ..................................... 4-51
4.4.1 PROGRAMMING PROCEDURE ................................................... 4-51
4.4.2 PARAMETERS .............................................................................. 4-52
4.5 SERVICE RAM ADDRESSES ................................................................ 4-55
5. PREVENTIVE MAINTENANCE .................................................... 5-1
5.1 SPECIAL TOOLS AND LUBRICANTS ..................................................... 5-1
5.2 PM TABLE ................................................................................................ 5-1
6. REPLACEMENT AND ADJUSTMENT........................................ 6-1
6.1 EXTERIOR ............................................................................................... 6-1
6.1.1 TOP COVER.................................................................................... 6-1
6.1.2 OPERATION PANEL ....................................................................... 6-2
6.2 ADF........................................................................................................... 6-2
6.2.1 FEED ROLLER ASSEMBLY............................................................ 6-2
6.2.2 SEPARATION ROLLER .................................................................. 6-3
6.3 SCANNER ................................................................................................ 6-3
6.3.1 SCANNER UNIT DISASSEMBLY.................................................... 6-3
6.3.2 SCANNER MOTOR ......................................................................... 6-4
6.3.3 R1/R2 ROLLERS ............................................................................. 6-5
6.3.4 CONTACT IMAGE SENSOR ASSEMBLY....................................... 6-6
6.3.5 SCANNER UNIT .............................................................................. 6-6
6.4 LASER PRINTING COMPONENTS ......................................................... 6-7
6.4.1 LASER UNIT.................................................................................... 6-7
6.5 DEVELOPMENT....................................................................................... 6-9
6.5.1 TRANSFER ROLLER ...................................................................... 6-9
6.6 FUSING .................................................................................................. 6-10
6.6.1 FUSING UNIT ................................................................................ 6-10
6.6.2 THERMISTOR ............................................................................... 6-11
6.6.3 HOT ROLLER STRIPPERS........................................................... 6-11
6.6.4 FUSING LAMP AND HOT ROLLER .............................................. 6-12
6.6.5 PRESSURE ROLLER.................................................................... 6-13
6.6.6 THERMOSTAT AND THERMOFUSE............................................ 6-13
6.7 PCBS ...................................................................................................... 6-14
6.7.1 NCU ............................................................................................... 6-14
6.7.2 PSU ............................................................................................... 6-14
6.7.3 POWER PACK............................................................................... 6-15
6.7.4 FCU ............................................................................................... 6-15
6.8 PAPER FEED ......................................................................................... 6-16
6.8.1 SEPARATION PAD ....................................................................... 6-16
6.8.2 PAPER FEED UNIT ASSEMBLY AND PAPER FEED MOTOR .... 6-17
6.8.3 PAPER END SENSOR AND REGISTRATION SENSOR.............. 6-18
6.8.4 PAPER FEED ROLLER/CLUTCH AND TRANSPORT ROLLER... 6-18
6.9 OTHERS................................................................................................. 6-19
6.9.1 INTERLOCK SWITCHES .............................................................. 6-19
6.9.2 MAIN MOTOR................................................................................ 6-20
6.9.3 REGISTRATION ROLLER............................................................. 6-21
6.9.4 TONER END SENSOR.................................................................. 6-22
