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22. IMAGE QUALITY PROBLEM
Field Service Ver. 2.0 Jul. 2009
862
TROUBLESHOOTING
22.3 Solution
NOTE
• Typical faulty image samples shown in the following are all printed with A3 setting.
22.3.1
Scanner system: white lines, white bands, colored lines and colored bands
in sub scan direction
A. Typical faulty images
B. Troubleshooting procedure
(1) When the original glass is used
A02EF4C507DA
White lines
White bands
Color bands
Color lines
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
Original glass
Original glass is dirty.
YES
Wipe the surface clean with
a soft cloth.
4
Shading sheet
Shading sheet is dirty.
YES
Wipe the surface clean with
a soft cloth.
5
Mirror, lens,
exposure Lamp, and
reflectors
Mirror is dirty
YES
Clean.
Lens is dirty
YES
Clean.
Exposure lamp is dirty
YES
Clean.
Reflectors are dirty
YES
Clean.
6
Machine
o
Scan
Area
o
Image Posi-
tion: Side Edge
(Service Mode)
The adjustment value for [Image
Position: Side Edge] falls within
the specified range.
NO
Readjust.
7
The white lines/bands or colored
lines/bands are blurry.
YES
Change exposure unit.
Change CCD unit.
Service Manual Y110571-1
Содержание d-color MF651
Страница 1: ...d Color MF651 d Color MF551 d Color MF451 Color Printer SERVICE MANUAL Code Y110571 1...
Страница 24: ...MEASURES TO TAKE IN CASE OF AN ACCIDENT S 22 Blank Page...
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