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1-6-8 PWBs ................................................................................................................................................. 1-6-25
(1) Detaching and refitting the main PWB .......................................................................................... 1-6-25
(2) Detaching and refitting the engine/high voltage PWB .................................................................. 1-6-26
(3) Detaching and refitting the power source PWB ............................................................................ 1-6-29
1-7 Firmware
1-7-1 Downloading firmware .......................................................................................................................... 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 the message data ..................................................................................................... 1-7-5
2-1 Mechanical construction
2-1-1 Paper feed/conveying section .............................................................................................................. 2-1-1
(1) Paper feed section/paper cassette ................................................................................................. 2-1-1
(2) MP tray feed section ....................................................................................................................... 2-1-3
(3) Conveying section .......................................................................................................................... 2-1-4
2-1-2 Process unit section ............................................................................................................................. 2-1-5
(1) Development section ...................................................................................................................... 2-1-5
(2) Main charger/drum section ............................................................................................................. 2-1-7
2-1-3 Laser scanner unit section ................................................................................................................... 2-1-9
(1) Laser scanner unit .......................................................................................................................... 2-1-9
2-1-4 Transfer/separation section ................................................................................................................ 2-1-12
2-1-5 Cleaning section ................................................................................................................................. 2-1-13
2-1-6 Fixing section ..................................................................................................................................... 2-1-15
2-1-7 Face-down eject/feedshift section ...................................................................................................... 2-1-17
2-2 Electrical Parts Layout
2-2-1 Electrical parts layout ........................................................................................................................... 2-2-1
(1) Main frame ...................................................................................................................................... 2-2-1
(2) Process unit, laser scanner and fixing unit ..................................................................................... 2-2-3
2-3 Operation of the PWBs
2-3-1 Power source PWB .............................................................................................................................. 2-3-1
2-3-2 Engine/high voltage PWB .................................................................................................................... 2-3-3
(1) Fixing heater lamp control circuit .................................................................................................... 2-3-4
(2) Fixing heater lamp lighting runaway prevention - fixing thermistor
disconnection detection circuit ........................................................................................................ 2-3-5
(3) Interlock switch - eco-power circuit ................................................................................................. 2-3-6
(4) Optional equipment identification circuit ......................................................................................... 2-3-7
2-3-3 Main PWB .......................................................................................................................................... 2-3-11
2-4 Appendixes
Timing chart No. 1 Paper cassette feeding, two A4 size papers ................................................................. 2-4-1
Timing chart No. 2 Paper cassette feeding, two A4R size papers ............................................................... 2-4-2
Timing chart No. 3 Paper cassette feeding, two A3 size papers ................................................................. 2-4-3
Timing chart No. 4 Paper cassette feeding, two B5 size papers ................................................................. 2-4-4
Timing chart No. 5 Paper cassette feeding, two B4 size papers ................................................................. 2-4-5
Timing chart No. 6 Paper cassette feeding, two letter size papers .............................................................. 2-4-6
Timing chart No. 7 Paper cassette feeding, two letter R size papers .......................................................... 2-4-7
Timing chart No. 8 Paper cassette feeding, two legal size papers .............................................................. 2-4-8
Timing chart No. 9 Paper cassette feeding, two ledger size papers ............................................................ 2-4-9
Timing chart No. 10 MP tray feeding, two A4 size papers ......................................................................... 2-4-10
Timing chart No. 11 MP tray feeding, two A4R size papers ...................................................................... 2-4-11
Timing chart No. 12 MP tray feeding, two A3 size papers ......................................................................... 2-4-12
Timing chart No. 13 MP tray feeding, two B5 size papers ......................................................................... 2-4-13
Timing chart No. 14 MP tray feeding, two B4 size papers ......................................................................... 2-4-14
Timing chart No. 15 MP tray feeding, two letter R size papers .................................................................. 2-4-15
FS-6020
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