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Field Service Ver. 2.0 Jul. 2009
22. IMAGE QUALITY PROBLEM
895
TROUBLESHOOTING
22.3.31
Printer 4-color: low image density
A. Typical faulty images
B. Troubleshooting procedure
A02EF4C516DA
ABCDE
ABCDE
ABCDE
ABCDE
ABCDE
Step
Section
Check item
Result
Action
1
Paper
Paper is damp.
YES
Change paper to one just
unwrapped from its package.
2
Transfer belt unit
Terminal is dirty.
YES
Clean.
3
Transfer roller
unit
Transfer roller is installed properly.
NO
Reinstall.
4
Charge neutralizing needle is not
separated and ground terminal is
connected properly.
NO
Correct or change.
5
IDC sensor
Sensor is dirty.
YES
Clean IDC sensor and execute
the image stabilization.
6
Image Process
Adjustment
o
Gradation
Adjust
(Service Mode)
“Conv. Value” falls within the
specified range as checked through
gradation adjust.
Dark: 0 ± 100
Highlight: 0 ± 60
YES
Go to step 9.
7
Image Process
Adjustment
o
D Max Density
(Service Mode)
The problem has been eliminated
through the adjust of D Max
Density.
NO
Go to next step.
8
Image Process
Adjustment
o
Stabilizer
o
Reset + Stabi-
lizer
(Service Mode)
After the Init Image Stabili-
zation sequence has been com-
pleted, run gradation adjust.
NO
Go to next step.
9
The problem has been eliminated
through the checks of steps up to 8.
NO
Change image transfer belt unit.
o
Change printer control board
o
Change high voltage unit/2.
Y110571-1 Service Manual
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...
Страница 27: ...d Color MF651 d Color MF551 d Color MF451 Color Printer SERVICE MANUAL Code Y110571 1...
Страница 511: ...Field Service Ver 2 0 Jul 2009 10 UTILITY 451 ADJUSTMENT SETTING Blank Page Y110571 1 Service Manual...
Страница 716: ...16 MECHANICAL ADJUSTMENT Field Service Ver 2 0 Jul 2009 656 ADJUSTMENT SETTING Blank Page Service Manual Y110571 1...
Страница 1053: ...UPDATING STATUS DATE UPDATED PAGES PAGES CODE 10 2009 1ST EDITION 1053053 Y110571 1...