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2DF
1-6-5 Developing section ............................................................................................................................. 1-6-34
(1) Detaching and refitting the developing unit .................................................................................. 1-6-34
1-6-6 Transfer section ................................................................................................................................. 1-6-35
(1) Detaching and refitting the transfer roller assembly ..................................................................... 1-6-35
1-6-7 Fixing section ..................................................................................................................................... 1-6-36
(1) Detaching and refitting the fixing unit ........................................................................................... 1-6-36
(2) Detaching and refitting the heat roller separation claws ............................................................... 1-6-36
(3) Detaching and refitting the press roller ......................................................................................... 1-6-37
(4) Detaching and refitting the fixing heater M and S ......................................................................... 1-6-38
(5) Detaching and refitting the heat roller ........................................................................................... 1-6-39
(6) Detaching and refitting the fixing unit thermistor .......................................................................... 1-6-40
1-7 Requirements on PCB Replacement
1-7-1 Upgrading the firmware on the main PCB ............................................................................................ 1-7-1
1-7-2 Replacing the backup ROM ................................................................................................................. 1-7-2
1-7-3 Adjustment-free variable resisters (VR) ............................................................................................... 1-7-3
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 Optical section ...................................................................................................................................... 2-1-7
(1) Original scanning ............................................................................................................................ 2-1-8
(2) Image printing ................................................................................................................................. 2-1-9
2-1-4 Developing section ............................................................................................................................. 2-1-12
(1) Formation of magnetic brush ........................................................................................................ 2-1-13
(2) Computing the absolute humidity ................................................................................................. 2-1-14
(3) Single component developing system ....................................................................................... 2-1-14-1
2-1-5 Transfer and separation sections ....................................................................................................... 2-1-15
2-1-6 Cleaning and charge erasing sections ............................................................................................... 2-1-17
2-1-7 Fixing section ..................................................................................................................................... 2-1-18
2-1-8 Eject and switchback sections ........................................................................................................... 2-1-20
2-2-1 Electrical parts layout ........................................................................................................................... 2-2-1
(1) PCBs .............................................................................................................................................. 2-2-1
(2) Switches and sensors ..................................................................................................................... 2-2-2
(3) Motors ............................................................................................................................................. 2-2-4
(4) Other electrical components ........................................................................................................... 2-2-5
2-3 Operation of the PCBs
2-3-1 Power source PCB ............................................................................................................................... 2-3-1
2-3-2 Main PCB ............................................................................................................................................. 2-3-4
2-3-3 Operation unit PCB ............................................................................................................................ 2-3-13
2-3-4 Scanner drive PCB ............................................................................................................................. 2-3-18
2-3-5 CCD PCB ........................................................................................................................................... 2-3-20
Timing chart No. 1 .......................................................................................................................................... 2-4-1
Timing chart No. 2 .......................................................................................................................................... 2-4-2
Timing chart No. 3 .......................................................................................................................................... 2-4-3
Timing chart No. 4 .......................................................................................................................................... 2-4-4
Timing chart No. 5 .......................................................................................................................................... 2-4-5
Timing chart No. 6 .......................................................................................................................................... 2-4-6
Timing chart No. 7 .......................................................................................................................................... 2-4-7
Timing chart No. 8 .......................................................................................................................................... 2-4-8
Timing chart No. 9 .......................................................................................................................................... 2-4-9
Timing chart No. 10 ...................................................................................................................................... 2-4-10
Timing chart No. 11 ...................................................................................................................................... 2-4-11
Chart of image adjustment procedures ........................................................................................................ 2-4-12
1-1-4
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