1-1-3
FS-9120DN/9520DN
1-6 Assembly and Disassembly
1-6-1 Precautions for assembly and disassembly ......................................................................................... 1-6-1
(1) Precautions ..................................................................................................................................... 1-6-1
1-6-2 Paper feed section ............................................................................................................................... 1-6-2
(1) Detaching and refitting the forwarding, paper feed and separation pulleys.................................... 1-6-2
(2) Detaching and refitting the MP separation, MP paper feed and MP forwarding pulleys ................ 1-6-4
(3) Detaching and refitting the left and right registration cleaner ......................................................... 1-6-9
1-6-3 Laser scanner unit .............................................................................................................................. 1-6-11
(1) Detaching and refitting the laser scanner unit .............................................................................. 1-6-11
(2) Adjusting the skew of the laser scanner unit (reference).............................................................. 1-6-13
1-6-4 Drum section ...................................................................................................................................... 1-6-14
(1) Detaching and refitting the drum unit............................................................................................ 1-6-14
(2) Detaching and refitting the main charger unit ............................................................................... 1-6-14
(3) Detaching and refitting the drum separation claw assemblies ..................................................... 1-6-15
1-6-5 Developing section ............................................................................................................................. 1-6-16
(1) Detaching and refitting the developing unit .................................................................................. 1-6-16
1-6-6 Transfer section ................................................................................................................................. 1-6-17
(1) Detaching and refitting the transfer roller assembly ..................................................................... 1-6-17
1-6-7 Fuser section ...................................................................................................................................... 1-6-18
(1) Detaching and refitting the fuser unit ............................................................................................ 1-6-18
(2) Detaching and refitting the heat roller separation claws ............................................................... 1-6-18
(3) Detaching and refitting the press roller ......................................................................................... 1-6-19
(4) Detaching and refitting the fuser heater M and S ......................................................................... 1-6-20
(5) Detaching and refitting the heat roller ........................................................................................... 1-6-21
(6) Detaching and refitting the fuser unit thermistor 1 and 2 .............................................................. 1-6-22
1-6-10 PWBs ................................................................................................................................................. 1-6-23
(1) Detaching and refitting the main controller PWB .......................................................................... 1-6-23
(2) Detaching and refitting the engine controller PWB ....................................................................... 1-6-24
(3) Detaching and refitting the power supply unit............................................................................... 1-6-25
(4) Detaching and refitting the high-voltage transformer unit ............................................................. 1-6-26
(5) Detaching and refitting the operator panel PWB .......................................................................... 1-6-27
1-7 Requirements on PWB Replacement
1-7-1 Downloading printer firmware for upgrade ........................................................................................... 1-7-1
(1) Format for the firmware files ........................................................................................................... 1-7-1
(2) Downloading firmware via the parallel interface ............................................................................. 1-7-2
(3) Downloading firmware using the memory card .............................................................................. 1-7-3
(4) Downloading message data ........................................................................................................... 1-7-5
2-1 Mechanical construction
2-1-1 Paper feed section ............................................................................................................................... 2-1-1
2-1-2 Main charging section .......................................................................................................................... 2-1-5
2-1-3 Laser scanner unit ................................................................................................................................ 2-1-7
(1) Laser scanner unit .......................................................................................................................... 2-1-7
2-1-4 Developing section ............................................................................................................................. 2-1-10
(1) Formation of magnetic brush ........................................................................................................ 2-1-11
(2) Computing the absolute humidity ................................................................................................. 2-1-12
2-1-5 Transfer and separation sections ....................................................................................................... 2-1-13
2-1-6 Cleaning and charge erasing sections ............................................................................................... 2-1-15
2-1-7 Fuser section ...................................................................................................................................... 2-1-16
2-1-8 Eject and switchback sections ........................................................................................................... 2-1-18
2-1-9 Duplex unit ......................................................................................................................................... 2-1-20