
22. IMAGE QUALITY PROBLEM
Field Service Ver. 2.0 Jul. 2009
878
TROUBLESHOOTING
22.3.16
Printer monocolor: white lines, white bands, colored lines and colored
bands in main scan direction
A. Typical faulty images
B. Troubleshooting procedure
A02EF4C508DA
White lines
White bands
Colored lines
Colored bands
Step
Section
Check item
Result
Action
1
Image check A white line or black line in main
scan direction is sharp.
NO
Clean the electrostatic charger wire.
2
Imaging unit The surface of the PC drum is
scratched.
YES
Change imaging unit.
3
Dirty on the outside.
YES
Clean.
4
Contact terminals make good con-
nection between each IU and
machine.
NO
Clean contact terminals.
5
Developing bias contact terminal
makes good connection.
NO
Clean contact terminal and check ter-
minal position.
6
PH unit
The surface of the PH window is
dirty.
YES
Clean with cleaning jig.
7
The problem has been eliminated
through the checks of steps up to 6.
NO
Change imaging unit.
o
Change image transfer belt unit.
o
Change PH 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...
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...