Scanner System: White Streaks Or Bands - Konica Minolta bizhub 250 Service Manual

21. Image quality problem
21.3.6

Scanner System: White streaks or bands

A. Typical Faulty Images
B. Troubleshooting Procedure
Step Section
1 Original
2 Original Cover
3
4 Shading Sheet
5 Mirrors/Lens/
Original Glass/
Reflectors
6 Exposure Lamp
7 BCRS Board
8
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EDNord - Istedgade 37A - 9000 Aalborg - telefon 96333500
4036fs4021c0
Check Item
Original is damaged or dirty.
Original Pad is dirty.
Original Cover does not lie flat.
Shading sheet is dirty.
Mirrors, lens, Original Glass and/or
reflectors are dirty.
Exposure Lamp is dirty.
The problem has been eliminated after
performing step 6.
The white lines or bands are blurry or
opaque.
Field Service Ver. 1.0 Aug. 2005
4036fs4022c0
Result Action
YES Change original.
YES Clean.
YES Replace Original Cover if
it is deformed or the
hinges are broken.
YES Clean.
YES Clean.
YES Clean.
Change Exposure Lamp.
NO Change the Jumper
Switch Setting on the
BCRS Board.
218
YES Change Exposure Unit.
Change CCD Unit.