Field Service Ver. 1.0 May 2006
16. Image quality problem
229
magicolor 7450
T
roubleshooting
16.3.14
4-Color: white lines in main scan direction, white bands in main scan direc-
tion, colored lines in main scan direction, and colored bands in main scan
direction
A. Typical Faulty Images
B. Troubleshooting Procedure
White lines in Main
Scan Direction
White bands in
Main Scan Direction
Colored lines in Main
Scan Direction
Colored bands in
Main Scan Direction
4036fs4025c0
4036fs4026c0
4036fs4027c0
4036fs4028c0
Step
Section
Check Item
Result
Action
1
Transfer Belt
Fingerprints, oil, or other foreign
matter is evident on the Transfer
Belt.
YES
Clean with specified solvent.
(See Maintenance.)
2
Transfer Belt is dirty or scratched.
YES
Clean dirty belt with a soft cloth.
Change Transfer Belt if belt is
damaged.
3
Cleaning Blade is not effective in
removing toner completely.
YES
Clean Cleaning Blade.
change Image Transfer Belt Unit.
4
Transfer Roller
Transfer Roller is dirty or scratched.
YES
Change Transfer Roller.
5
Paper path
There is foreign matter on paper
path.
YES
Remove foreign matter.
6
Image Transfer Paper Separator
Fingers are damaged or dirty.
YES
Clean or change.
7
Fusing Unit
Fusing Entrance Guide Plate is
dirty or damaged.
YES
Clean.
Change Fusing Unit.
8
Fusing Paper Separator Fingers
are dirty.
YES
Clean.
9
Neutralizing
Brush
The resistance values between the
Neutralizing brush and the ground
terminal is not
∞
.
NO
Check the contact. Modify.
Change Neutralizing brush.
10
The problem has been eliminated
through the checks of steps up to 9.
NO
Change Controller Board
Содержание magicolor 7450
Страница 1: ...SERVICE MANUAL 2006 05 2006 05 Ver 1 0 Ver 1 0 FIELD SERVICE magicolor 7450 magicolor 7450 ...
Страница 3: ...ii Blank Page ...
Страница 26: ...SERVICE MANUAL 2006 05 Ver 1 0 FIELD SERVICE Main Unit magicolor 7450 magicolor 7450 ...
Страница 43: ...2 Product specifications Field Service Ver 1 0 May 2006 6 magicolor 7450 General Blank Page ...
Страница 288: ...SERVICE MANUAL 2006 05 Ver 1 0 FIELD SERVICE Lower Feeder Unit ...
Страница 293: ...1 Product specifications Field Service Ver 1 0 May 2006 2 Lower Feeder Unit General Blank Page ...
Страница 317: ...3 Other Field Service Ver 1 0 May 2006 26 Lower Feeder Unit Maintenance Blank Page ...
Страница 321: ...5 Sensor check Field Service Ver 1 0 May 2006 30 Lower Feeder Unit Adjustment Setting Blank Page ...
Страница 328: ...SERVICE MANUAL 2006 05 Ver 1 0 FIELD SERVICE Duplex Option ...
Страница 331: ...Duplex Option General Maintenance Adjustment Setting Troubleshooting Field Service Ver 1 0 May 2006 ii Blank Page ...
Страница 333: ...1 Product specifications Field Service Ver 1 0 May 2006 2 Duplex Option General Blank Page ...
Страница 345: ...6 Jam Display Field Service Ver 1 0 May 2006 14 Duplex Option Troubleshooting Blank Page ...