Pitch Lines, Pitch Uneven Density - Konica Minolta magicolor 1680MF Service Manual

Field Service Ver. 1.0 Nov. 2008
20.1.17

Pitch lines, pitch uneven density

A. Typical faulty images
4138fs4507c0
B. Troubleshooting procedure
Step Section
1 Image check
2 Toner cartridge
3 PH unit
4 Toner cartridge
Imaging
5
cartridge
2nd transfer
6
roller
7 Fuser unit
8
24mm
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Check item
Do faint lines extending in parallel
with the main scanning direction
occur at a pitch of 24 mm?
Does uneven density at a pitch of
25 mm occur?
Is the toner cartridge for each
color of toner installed in posi-
tion?
Is the PH unit secured in position
with the fixing screw?
Is the drive mechanism of the
toner Cartridge dirty or dam-
aged?
Is the photo conductor dirty,
scratched, or worn?
Are the 2nd transfer roller and
drive mechanism dirty, deformed,
or worn?
Are the rollers and drive mecha-
nism of the fuser unit dirty,
scratched, deformed, or worn?
Have steps 1 to 7 eliminated the
problem?
http://www.manuals4you.com
20. Image quality problems
25mm
Result Action
• Execute [UTILITY] - [MACHINE
SETTING] - [IMAGE
REFRESH].
See P.91
NOTE
YES
• If one image refresh
sequence does not make the
faint lines less noticeable,
run it a second time.
• Leave the main unit to stand
YES idle under environment free of
high humidity.
NO Reinstall.
NO Secure it in position.
Clean or replace the toner car-
YES
tridge.
YES Replace the imaging cartridge.
YES Replace the 2nd transfer roller.
YES Replace the fuser unit.
NO Replace the imaging cartridge.
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