44952001TH Rev.2
7-84
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURES
7.5.6 (5) Print quality problems appear periodically (see Fig. 7-2 E).
(5-1) Print quality problems appear vertically and periodically.
Check item Checking method Action in case of NG
(5-1-1) Cycle
Image drum Check if the cycle is 94.3 mm. Replace any
applicable ID unit.
Developing roller Check if the cycle is 30.2 mm. Replace any
applicable ID unit.
Toner supply roller Check if the cycle is 43.1 mm. Replace any
applicable ID unit.
Charging roller Check if the cycle is 29.9 mm. Replace any
applicable ID unit..
Roller above the
fuser
Check if the cycle is 85.4 mm. Replace any
applicable fuser unit.
Fuser belt Check if the cycle is 94.2 mm. Replace any
applicable fuser unit.
Transfer roller Check if the cycle is 37.7 mm. Replace the belt unit.
When using any new
consumable as a try,
select FUSE KEEP
MODE of the system
maintenance menu.
7.5.6 (6) Color misregistration is significant.
(6-1)Themessage“Adjustingcolor”displayedatpoweronstaysforashorttime.
Check item Checking method Action in case of NG
(6-1-1)Colorregistrationadjustmentresult
Time of color
registration
adjustment(ifitis
normal, correction
takes about 40
seconds)
Execute REG ADJUST TEST in the self-
diagnostic mode and check the result.
Even if an error has occurred, it is not
displayed when ON LINE is displayed.
Replace the sensor if
the result shows NG.
Clean the sensor.
Replace the shutter.
Replace the CU/PU
board.
(6 -1-2) Toner
Remaining toner
amount
Check the operator panel if it displays
“Prepare to replace the toner cartridge” or
“Replace the toner cartridge.”
Replace an applicable
toner cartridge with a
new one.
(6-1-3) Color registration sensor
Dirty sensor Check the sensor if it is dirty with toner or
paper dust.
Wipe them off.
(6-1-4) Color registration sensor shutter
Malfunction of the
shutter
Check shutter operation in the self-
diagnostic mode.
Replace the shutter or
repair the mechanism.
(6-2) Although the REG ADJUST TEST result of the engine maintenance function is OK,
color misregistration occurs.
Check item Check operation
Actions for NG results
(6-2-1) Feeding system
Paper feed state in
the paper feed path
Check the paper feed path if there is
something that blocks the paper in the paper
feed path.
Remove the blocking
object.
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