Image Quality Problems; Printer System; White Lines/Bands, Colored Lines/Bands In Sub Scan Direction - Konica Minolta magicolor 1680MF Service Manual

Field Service Ver. 1.0 Nov. 2008

20. Image quality problems

20.1 Printer system

NOTE
• Typical faulty image samples shown in the following are all printed with A4S set-
ting.
20.1.1

White lines/bands, colored lines/bands in sub scan direction

A. Typical faulty images
white lines in
sub scan direction
B. Troubleshooting procedure
Step Section
1
2
3
Imaging
cartridge
4
5
6
PH unit
7
2nd transfer
8
roller
9 Media path
10 Fuser unit
11
white bands in
sub scan direction
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 imaging cartridge con-
nected properly?
Is the transfer belt dirty with fin-
gerprints or oil?
Is the transfer belt dirty or
scratched?
Is the connector or contact termi-
nal of the PH unit connected
properly?
Is the window surface dirty?
Is the 2nd transfer roller dirty or
scratched?
Is there a foreign object in the
media path?
Is the fusing entrance guide plate
dirty or scratched?
Have steps 1 to10 eliminated the
problem?
http://www.manuals4you.com
20. Image quality problems
colored lines in colored bands in
sub scan direction sub scan direction
Result
YES Replace the imaging cartridge.
YES Clean.
NO Clean the contact terminal.
YES Clean.
Wipe the surface clean of dirt with
a soft cloth.
YES
Replace the scratched transfer
belt with a new imaging cartridge.
Clean the contact terminal or
NO
reconnect the connector.
YES Clean.
YES Replace the 2nd transfer roller.
YES Remove the foreign object.
Clean.
YES
Replace the fuser unit.
Replace the toner cartridge.
NO
→ Replace the PH unit.
A0CRF4C503DA
Action
259