Read Sharp AR-285 (serv.man11) Service Manual online
Note for assembling the copy lamp unit
Shift the copy lamp unit to the paper exit side, and fix it with the
harness guide so that the distance from the lower frame is about 24
harness guide so that the distance from the lower frame is about 24
±
2mm with the copy lamp harness extended.
After fixing, manually shift the copy lamp unit a few times to check
that it moves smoothly.
that it moves smoothly.
If the copy lamp harness is loosely fixed, the copy lamp unit may
jump up when reading, resulting in abnormal reading.
jump up when reading, resulting in abnormal reading.
(2) Vertical image distortion balance adjustment
(No. 2/3 mirror base unit installing position
adjustment)
adjustment)
This adjustment is to adjust the parallelism of the mirror base to the
OPC drum surface and the original surface.
OPC drum surface and the original surface.
1) Manually turn the mirror base drive pulley to bring mirror base B
into contact with mirror base positioning plate.
If, at that time, the front frame side and the frame side of mirror
base B are brought into contact with the mirror base positioning
plate simultaneously, the parallelism is correct and there is no
need for adjustment.
base B are brought into contact with the mirror base positioning
plate simultaneously, the parallelism is correct and there is no
need for adjustment.
(3) Sub scanning direction distortion adjustment
(Winding pulley position adjustment)
This adjustment is executed in the following cases:
•
When the mirror base drive wire is replaced.
•
When the lamp unit, or No. 2/3 mirror holder is replaced.
•
When a copy shown below is made.
24±2mm
Lb
La
Original
Paper exit
direction
direction
Copy
7 – 8
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