Konica Minolta bizhub C650 Service Manual page 758

Field Service Ver. 8.0 Jun. 2008
18.3.10 Scanner system: low image density, rough image
A. Typical faulty images
B. Troubleshooting procedure
Step Section
Original glass
1
Shading sheet
2
3 Mirror, lens, expo-
sure lamp, and
4
reflectors
5
6
7
ABCDE
ABCDE
ABCDE
ABCDE
ABCDE
Check item
Original Glass is dirty.
Shading sheet is dirty.
Mirror is dirty.
Lens is dirty.
Exposure lamp is dirty.
Reflectors are dirty.
The problem has been eliminated
through the checks of steps up to 6.
18. Image quality problem
4036fs4036c0
Result
YES Wipe the surface clean with a
soft cloth.
YES Wipe the surface clean with a
soft cloth.
YES Clean.
YES Clean.
YES Clean.
YES Clean.
NO Clean exposure lamp.
→ Change scanner assy.
→ Change CCD unit.
Action
703