2JL/2JJ/2JG/2JD
(10) Dots appear on the image...............................................................................................................1-4-53
(11) The leading edge of the image is consistently misaligned with the original. ...................................1-4-53
(12) The leading edge of the image is sporadically misaligned with the original....................................1-4-53
(13) Paper creases. ................................................................................................................................1-4-54
(14) Offset occurs. ..................................................................................................................................1-4-54
(15) Image is partly missing....................................................................................................................1-4-54
(16) Fusing is poor..................................................................................................................................1-4-55
(17) Image is out of focus. ......................................................................................................................1-4-55
(18) Colors are printed offset to each other............................................................................................1-4-55
(19) Image center does not align with the original center.......................................................................1-4-55
1-4-4 Electric problems ..................................................................................................................................1-4-56
1-4-5 Mechanical problems............................................................................................................................1-4-60
1-5 Assembly and Disassembly
1-5-1 Precautions for assembly and disassembly............................................................................................1-5-1
(1) Precautions .......................................................................................................................................1-5-1
(2) Drum..................................................................................................................................................1-5-1
(3) Toner.................................................................................................................................................1-5-1
1-5-2 Paper feed section..................................................................................................................................1-5-2
(1) Detaching and refitting the forwarding, paper feed and separation pulleys ......................................1-5-2
(2) Detaching and refitting the MP unit ...................................................................................................1-5-4
(3) Detaching and refitting the MP forwarding, MP paper feed and MP separation pulleys ...................1-5-6
1-5-3 Optical section ........................................................................................................................................1-5-8
(1) Detaching and refitting the exposure lamp........................................................................................1-5-8
(2) Detaching and refitting the scanner wires .......................................................................................1-5-11
(3) Detaching and refitting the ISU (reference).....................................................................................1-5-15
(4) Detaching and refitting the laser scanner unit.................................................................................1-5-17
(5) Manual color registration adjustment ..............................................................................................1-5-22
1-5-4 Image formation section........................................................................................................................1-5-24
(1) Detaching and refitting the image formation holder.........................................................................1-5-24
(2) Detaching and refitting the developing unit .....................................................................................1-5-25
(3) Detaching and refitting the drum unit ..............................................................................................1-5-26
(4) Detaching and refitting the charger roller unit .................................................................................1-5-26
1-5-5 Transfer section ....................................................................................................................................1-5-27
(1) Detaching and refitting the transfer belt unit....................................................................................1-5-27
(2) Detaching and refitting the transfer roller ........................................................................................1-5-28
1-5-6 Fuser section ........................................................................................................................................1-5-30
(1) Detaching and refitting the fuser unit...............................................................................................1-5-30
1-5-7 Other.....................................................................................................................................................1-5-31
(1) Detaching and refitting the engine PWB .........................................................................................1-5-31
(2) Detaching and refitting the conveying drive unit..............................................................................1-5-35
(3) Detaching and refitting the registration clutch .................................................................................1-5-36
(4) Detaching and refitting the right filter and rear filter ........................................................................1-5-37
(5) Detaching and refitting the LSU cleaning clutch..............................................................................1-5-38
1-6 Requirements on PWB Replacement
1-6-1 Upgrading the firmware...........................................................................................................................1-6-1
1-6-2 Remarks on main PWB replacement......................................................................................................1-6-2
1-6-3 Remarks on scanner PWB replacement.................................................................................................1-6-2
1-6-4 Remarks on printer PWB replacement ...................................................................................................1-6-2
2-1 Mechanical construction
2-1-1 Paper feed section..................................................................................................................................2-1-1
(1) Cassette paper feed section..............................................................................................................2-1-1
(2) MP tray paper feed section ...............................................................................................................2-1-3
2-1-2 Drum section...........................................................................................................................................2-1-5
(1) Drum section .....................................................................................................................................2-1-5
2-1-3 Developing section..................................................................................................................................2-1-7
(1) Developing section............................................................................................................................2-1-7
2-1-4 Optical section ........................................................................................................................................2-1-9
(1) Image scanner section ......................................................................................................................2-1-9
(2) Laser scanner section .....................................................................................................................2-1-11
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