Color Misregistration Is Significant; The Message "Adjusting Color" Displayed At Power On Stays For A Short Time; Although The Reg Adjust Test Result Of The Engine Maintenance Function Is Ok, Color Misregistration Occurs; Black Filled-In Printing - Oki C310dn Maintenance Manual

Oki Data CONFIDENTIAL

7.5.3 (6) Color misregistration is significant.

(6-1) The message "Adjusting color" displayed at power on stays for a short time.

Check item
(6-1-1) Color registration adjustment result
Time of color Execute REG ADJUST TEST in the self-
registration diagnostic mode and check the result.
adjustment (if it is Even if an error has occurred, it is not
normal, correction displayed when ON LINE is displayed.
takes about 40
seconds)
(6-1-2) Toner
Remaining toner Check the operator panel if it displays "Prepare
amount to replace the toner cartridge" or "Replace the
toner cartridge."
(6-1-3) Color registration sensor
Dirty sensor Check the sensor if it is dirty with toner or
paper dust.
(6-1-4) Color registration sensor shutter
Malfunction of the Check shutter operation in the self-diagnostic
shutter mode.
(6-2) Although the REG ADJUST TEST result of the engine maintenance function is OK,
color misregistration occurs.
Check item
(6-2-1) Feeding system
Paper feed state in Check the paper feed path if there is
the paper feed path something that blocks the paper in the paper
feed path.
44346001TH Rev.1
Check operation Actions for NG
results
Replace the
sensor if the
result shows
NG. Clean the
sensor. Replace
the shutter.
Replace the
CU/PU board.
Replace an
applicable toner
cartridge with a
new one.
Wipe them off.
Replace the
shutter or repair
the mechanism.
Actions for NG
Check operation
results
Remove the
blocking object.

(7) Black filled-in printing

(7-1) Printed pages are filled-in black entirely.

Check item
(7-1-1) High-voltage terminal contacting state
CH terminal From above the printer, visually check if the
terminal jutting out the printer contacts the
high-voltage terminal, which is located on the
left side of the ID unit, normally.
CH terminal Check if the high-voltage terminal on the high-
voltage board is in a normal contact state.
Open the left-side cover, detach the high-
voltage board, and check if the terminal is
installed improperly.
ID unit terminal Visually check each ID unit high-voltage
terminal if it contacts the contact assembly
properly. (See Fig. 7-3.)
(7-1-2) High-voltage output state
CH output If a high-voltage probe is available as a
maintenance tool, open the left-side cover
and check CH output on the soldering side of
the high-voltage board using the high-voltage
probe during printing. (High-voltage probes
are not a general maintenance tool.)
7. TROUBLESHOOTING
Check operation Actions for NG
results
Replace the
terminal on the
printer side.
Remove
and install
the terminal
properly.
Replace any
applicable ID
unit or high-
voltage board,
or correct any
applicable high-
voltage terminal.
When using a
new ID unit as a
try, select FUSE
KEEP MODE
of the system
maintenance
menu.
Replace the
high-voltage
board.
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