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22. IMAGE QUALITY PROBLEM
Field Service Ver. 2.0 Jul. 2009
872
TROUBLESHOOTING
22.3.10
Scanner system: low image density, rough image
A. Typical faulty images
B. Troubleshooting procedure
A02EF4C516DA
ABCDE
ABCDE
ABCDE
ABCDE
ABCDE
Step
Section
Check item
Result
Action
1
Original glass
Original Glass is dirty.
YES
Wipe the surface clean with a
soft cloth.
2
Shading sheet
Shading sheet is dirty.
YES
Wipe the surface clean with a
soft cloth.
3
Mirror, lens,
exposure lamp,
and reflectors
Mirror is dirty.
YES
Clean.
4
Lens is dirty.
YES
Clean.
5
Exposure lamp is dirty.
YES
Clean.
6
Reflectors are dirty.
YES
Clean.
7
The problem has been eliminated
through the checks of steps up to 6.
NO
Clean exposure lamp.
o
Change exposure unit.
o
Change CCD unit.
Service Manual Y110571-1
Summary of Contents for d-color MF651
Page 1: ...d Color MF651 d Color MF551 d Color MF451 Color Printer SERVICE MANUAL Code Y110571 1...
Page 24: ...MEASURES TO TAKE IN CASE OF AN ACCIDENT S 22 Blank Page...
Page 27: ...d Color MF651 d Color MF551 d Color MF451 Color Printer SERVICE MANUAL Code Y110571 1...
Page 1053: ...UPDATING STATUS DATE UPDATED PAGES PAGES CODE 10 2009 1ST EDITION 1053053 Y110571 1...