2KN/2KP
(18) Image center does not align with the original center. ......................................................................1-4-57
(19) Image is not square.........................................................................................................................1-4-57
(20) There is a regular error between the centers of the original and copy image
when the DP is used. ......................................................................................................................1-4-58
(21) There is a regular error between the leading edges of the original and copy image
when the DP is used. ......................................................................................................................1-4-58
(22) A line appears at the leading or trailing edge..................................................................................1-4-58
(23) A line appears at the leading or trailing edge..................................................................................1-4-58
1-4-4 Electric problems ..................................................................................................................................1-4-59
1-4-5 Mechanical problems............................................................................................................................1-4-74
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 container .................................................................................................................................1-5-1
1-5-2 Paper feed section..................................................................................................................................1-5-3
(1) Detaching and refitting the paper feed pulley, forwarding pulley and separation pulley of
cassette 1 and 2................................................................................................................................1-5-3
(2) Detaching and refitting the paper feed pulley, forwarding pulley and separation pulley of
cassette 3 and 4..............................................................................................................................1-5-10
(3) Pressure adjustment of separation pulley (reference).....................................................................1-5-14
(4) Adjusting the center line for cassette 1 or 2 ....................................................................................1-5-15
(5) Detaching and refitting the MP unit .................................................................................................1-5-17
(6) Detaching and refitting the MP paper feed pulley, MP forwarding pulley and
MP separation pulley.......................................................................................................................1-5-19
(7) Pressure adjustment of MP separation pulley.................................................................................1-5-24
1-5-3 Main charging section...........................................................................................................................1-5-25
(1) Detaching and refitting the main charger unit..................................................................................1-5-25
(2) Detaching and refitting the main charger grid .................................................................................1-5-26
(3) Detaching the main charger wire cleaning pad ...............................................................................1-5-26
(4) Detaching and refitting the main charger wire.................................................................................1-5-27
1-5-4 Optical section ......................................................................................................................................1-5-28
(1) Detaching and refitting the exposure lamp......................................................................................1-5-28
(2) Detaching and refitting the scanner wires .......................................................................................1-5-31
(2-1) Detaching the scanner wires...................................................................................................1-5-31
(2-2) Fitting the scanner wires .........................................................................................................1-5-33
(3) Detaching the laser scanner unit.....................................................................................................1-5-36
(4) Detaching and refitting the ISU (reference).....................................................................................1-5-39
(5) Adjusting the longitudinal squareness (reference) ..........................................................................1-5-41
(6) Adjusting scanner image lateral squareness (reference) ................................................................1-5-42
(6-1) Adjusting the position of the laser scanner unit.......................................................................1-5-42
(6-2) Adjusting the position of the ISU .............................................................................................1-5-43
1-5-5 Drum section.........................................................................................................................................1-5-44
(1) Detaching and refitting the drum .....................................................................................................1-5-44
(2) Detaching and refitting the drum heater..........................................................................................1-5-45
(3) Detaching and refitting the drum heater electrode ..........................................................................1-5-47
1-5-6 Developing section................................................................................................................................1-5-48
(1) Detaching and refitting the developing unit .............
........................................................................1-5-48
1-5-7 Transfer section ....................................................................................................................................1-5-49
(1) Detaching and refitting the transfer unit ..........................................................................................1-5-49
(2) Detaching and refitting the transfer belt ..........................................................................................1-5-51
(3) Detaching and refitting the transfer roller ........................................................................................1-5-53
1-5-8 Cleaning section ...................................................................................................................................1-5-54
(1) Detaching and refitting the cleaning unit .........................................................................................1-5-54
(2) Detaching and refitting the cleaning blade ......................................................................................1-5-55
1-5-9 Charge erasing section.........................................................................................................................1-5-56
(1) Detaching and refitting the PTC unit ...............................................................................................1-5-56
(2) Detaching and refitting the PTC cleaning pad.................................................................................1-5-56
(3) Detaching and refitting the PTC wire...............................................................................................1-5-57
1-5-10 Fuser section ........................................................................................................................................1-5-58
(1) Detaching and refitting the fuser unit...............................................................................................1-5-58
(2) Detaching and refitting the lower cleaning roller .............................................................................1-5-59
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