Foggy Background - Konica Minolta magicolor 2500W Service Manual

Field Service Ver. 1.0 Aug. 2006
19.1.7

Foggy background

A. Typical faulty images
B. Troubleshooting procedure
Step Section
1
2 Drum cartridge
3
4 Toner cartridge
5
PH unit
6
7 IDC sensor
8
ABCD
ABCD
ABCD
ABCD
ABCD
Check item
Are there scratches or lines evi-
dent on the photo conductor sur-
face?
Is the outside dirty?
Is the connector or contact termi-
nal of the drum cartridge con-
nected properly?
Is the developing bias contact ter-
minal in good contact?
Is the connector or contact termi-
nal of the PH unit connected
properly?
Is the window surface dirty?
Is the sensor dirty?
Have steps 1 to 7 eliminated the
problem?
19. Image quality problems
4036fs4030c0
Result
YES Replace the drum cartridge.
YES Clean.
Clean the contact terminal or
NO
reconnect the connector.
Clean the contact terminal or
NO
check the terminal position.
Clean the contact terminal or
NO
reconnect the connector.
YES Clean.
YES Clean.
Replace the toner cartridge.
→ Replace the PH unit.
NO
→ Replace the IDC sensor.
Action
167