21. Image quality problem Field Service Ver. 1.0 Aug. 2005
256
bizhub 200/250/350
Troubleshooting
21.3.4 Scanner System: Black streaks or bands
A. Typical Faulty Images
B. Troubleshooting Procedure
4036fs4023c0 4036fs4024c0
Step Section Check Item Result Action
1 Original Original is damaged or dirty. YES Change original.
2 Original Cover Original Pad is dirty. YES Clean.
3 Original Cover does not lie flat. YES Replace Original Cover if
it is deformed or the
hinges are broken.
4 Shading Sheet Shading sheet is dirty. YES Clean.
5 Mirrors/Lens/
Original Glass/
Reflectors
Mirrors, lens, Original Glass and/or
reflectors are dirty.
YES Clean.
6 Exposure Lamp Exposure Lamp is dirty. YES Clean.
Change Exposure Lamp.
7 BCRS Board The problem has been eliminated after
performing step 6.
NO Change the Jumper
Switch Setting on the
BCRS Board.
☞ 218
8 PWBs and Con-
nection Cables
Connectors are securely connected with
no bent pins and no breaks in the con-
nection cables.
NO Reconnect.
Replace the connection
cable.
9 MFBS Board Connectors on the MFBS Board are
connected properly.
NO Reconnect.
10 The problem has been eliminated after
performing step 9.
NO Change MFBS Board.
11 CCD Unit Connectors on the CCD Unit Board are
connected properly.
NO Reconnect.
12 The problem has been eliminated after
performing step 11.
NO Change CCD Unit.
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