Oki Data CONFIDENTIAL
45850101TH Rev.1
2-77
2. TROUBLESHOOTING PROCEDURES
2.5.6.(4) Black banding/black streaking in vertical direction
(4-1)
Thin vertical line (with color) (Refer to Figure 2-1 D.)
Check item
Check work
Actions to be taken
at NG
(4-1-1) ID unit condition
Filming of the ID
unit
Is print attempted without toner?
Replace toner
cartridge with
new one. If
replacement
does not solve
the problem,
replace the
ID unit. If any
attempt of using
new ID unit as
a trial is going
to be made,
be sure to use
the System
Maintenance
Menu FUSE
KEEP MODE.
(4-2)
Thin vertical line (without color) (Refer to Figure 2-1 F.)
Check item
Check work
Actions to be taken
at NG
(4-2-1) LED head condition
LED head
Is any foreign material attached on the light
emitting surface of the cell fox lens of the LED
head?
Remove
the foreign
material.
(4-2-2) Condition of paper running path
Paper running path
Check that any burr that may scatter the un-
fused toner on the paper running path does
not exist.
Remove the
burr.
2.5.6.(5) Periodic abnormalities (Refer to Figure 2-1 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 94.3 mm.
Replace the ID
unit
Developing roller
Check that the cycle is 37.2 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 142.6 mm.
Replace the
fuser unit.
BU Roller of fuser
Check that the cycle is 113.1 mm.
Replace the
fuser unit.
Transfer roller
Check that the cycle is 50.3 mm.
Replace the
belt unit.
If any attempt
of using new
consumable
item as a trial
is going to
be made, be
sure to use
the System
Maintenance
Menu FUSE
KEEP MODE.
