Incorrect Color Image Registration; Foggy Background - Konica Minolta BIZHUB C3100P Service Manual

(2) Troubleshooting procedure
Step Section
1 Damp paper
2 Write section
3 Transfer roller
4
5 IDC sensor
6 AIDC PROCESS
7

5.2.9 Incorrect color image registration

(1) Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
(2) Troubleshooting procedure
Step Section
1 Machine condition
2 AIDC PROCESS
3 Transfer belt unit
4
5
6 Imaging unit
7 Transfer roller
8
9

5.2.10 Foggy background

(1) Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
(2) Troubleshooting procedure
Step Section
1 Damp paper
Check item
Paper is damp.
Terminal is dirty.
Transfer roller is installed properly.
Charge neutralizing needle is not separated and ground
terminal is connected properly.
• IDC sensor is dirty.
• IDC sensor cover does not operate properly.
Select [Service Mode] -> [SYSTEM 2] -> [AIDC
PROCESS] and the image trouble is eliminated.
The problem has been eliminated through the checks of
steps up to 6.
Check item
Vibration is given to the machine after power switch has
been turned ON.
Select [Service Mode] -> [SYSTEM 2] -> [AIDC
PROCESS] and the image trouble is eliminated.
Fingerprints, oil, or other foreign matter is evident on the
transfer belt.
Transfer belt is dirty or scratched.
Drive coupling to the machine is dirty.
The surface of the PC drum is scratched.
Transfer roller is installed properly.
Transfer roller is dirty or scratched.
The problem has been eliminated through the checks of
steps up to 8.
Check item
Paper is damp.
K TROUBLESHOOTING > 5. IMAGE QUALITY PROBLEM
Result
YES
YES
YES
Result
YES
YES
YES
YES
YES
YES
Result
YES
K-31
Action
Change paper to one just unwrapped
from its package.
Clean.
NO Reinstall.
NO Correct or change.
• Clean.
• Clean or correct the IDC sensor
cover.
NO Go to the next step.
NO • Replace the transfer belt unit.
• Replace the printer control board.
• Replace the high voltage unit.
• Replace the MFP board.
Action
Turn off the power switch and turn it
on again more than 10 seconds after.
NO Go to the next step.
Clean it with the tender cloth or paper
which is dusted with the toner.
• Clean dirty belt with a soft cloth.
• Replace the transfer belt unit
is damaged.
Clean.
Replace the imaging unit.
NO Reinstall.
Replace the transfer roller.
NO • Replace the transfer belt unit.
• Replace the printer control board.
• Replace the MFP board.
Action
Change paper to one just unwrapped
from its package.
if belt