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22. IMAGE QUALITY PROBLEM
Field Service Ver. 2.0 Jul. 2009
866
TROUBLESHOOTING
22.3.4
Scanner system: fog
A. Typical faulty images
B. Troubleshooting procedure
A02EF4C510DA
ABCD
ABCD
ABCD
ABCD
ABCD
Step
Section
Check item
Result
Action
1
Original
Original is damaged or dirty.
YES
Change original.
2
ADF
Original pad is dirty.
YES
Clean.
3
ADF does not lie flat.
YES
Change ADF if it is deformed or
hinges are broken.
4
Original glass
Original glass is dirty.
YES
Wipe the surface clean with a
soft cloth.
5
Shading sheet
Shading sheet is dirty.
YES
Wipe the surface clean with a
soft cloth.
6
Mirror, lens,
exposure lamp,
and reflectors
Mirror is dirty.
YES
Clean.
7
Lens is dirty.
YES
Clean.
8
Exposure lamp is dirty.
YES
Clean.
9
Reflectors are dirty.
YES
Clean.
10
Basic screen
Quality/Density
The problem is eliminated when the
image is produced in the manual
exposure setting.
NO
Try another exposure level in
manual.
11
The problem has been eliminated
through the checks of steps up to 10.
NO
Change exposure unit.
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...