45530603TH Rev.2
4-84
Oki Data CONFIDENTIAL
4. TROUBLESHOOTING PROCEDURE
4.5.3.(5) Periodic abnormalities (Refer to Figure 4-2 E)
(5-1)
Periodic abnormality occurs in vertical direction
Check item
Check work
Actions to be taken
at NG
(5-1-1) Cycle
Image drum
Check that the cycle is 125 mm.
Replace the ID
unit
Developing roller
Check that the cycle is 38 mm.
Replace the ID
unit
Toner feed roller
Check that the cycle is 54.6 mm.
Replace the ID
unit
Charge roller
Check that the cycle is 37.7 mm.
Replace the ID
unit
Fuser belt
Check that the cycle is 152.7mm.
Replace the
fuser unit
Fuser lower roller
Check that the cycle is 125.7mm.
Replace the
fuser unit
Transfer Belt
Check that the cycle is 1211mm.
Clean the
transfer belt
(1)
Impregnate
a BEMCOT
with primary or
highest quality
ethanol.
(2)Wipe the
Belt unit
not caused
damage.
(3)Wipe
evenly by new
BEMCOT.
To use a new
consumable for
a try, be sure to
use New Parts
Keep Mode
of the System
Maintenance
menu.
4.5.3.(6) Significant color misregistration
(6-1)
Color misregistration occurs.
Check item
Check work
Actions to be taken
at NG
(6-1-1) Result of color registration error correction
Color registration
error correction
time (If a printer is
normal, it is approx.
40 seconds.)
Use the self-diagnostic mode and execute the
REG ADJUST TEST. Check the result. Error
is issued but is not displayed on the ON LINE
display.
Replace the
sensor that
causes the
error. Clean
the sensor
to remove
stain. Replace
the shutter.
Replace the
PU/CU PCB.
(6-1-2) Toner
Remaining amount
of toner
Check if the message “Prepare toner
replacement.” or “Replace the toner.” appears
or not
Replace toner
cartridge with
new one.
(6-1-3) Color registration error detection sensor
Sensor is dirty
Is toner or paper dust attached to the sensor?
Clean the
sensor to
remove stain
(6-1-4) Color registration error detection sensor shutter
Shutter operation is
faulty
Check the shutter operation by the self-
diagnostic mode
Replace the
shutter or tune
the mechanism
(6-2)
Thought REG ADJUST TEST of engine maintenance function results ok, color
misregistration occurs.
Check item
Check work
Actions to be taken
at NG
(6-2-1) Paper feed system
Paper feed system
of the paper
running path
Check if any obstacle exists in the paper
feeding path, that hampers smooth paper run.
Remove the
obstacle