Oki Data CONFIDENTIAL
43967002TH Rev. 1
347 /
7. Troubleshooting
7.5.3 Troubleshooting the abnormal images
A
Overall faded-out
Blurred
B
Stain on white print
C
Entirely white
D
Black banding/black
streaking in vertical
direction
E
Cyclic abnormality
F
White banding/white
streaking in vertical
direction
Fig. 7-2
Note!
When an attempt is going to be made to replace the PU PCB, be sure to read
the data contents of the EEPROM chip from the old PU PCB beforehand, and
copy the data contents into the new PCB after the new PU PCB is installed.
7.5.3.(1) Color has faded-out and blurred entirely. (Refer to Figure 7-2
A
) ............. 348
(1-1) Color are faded-out and blurred. .......................................................... 348
7.5.3.(2) Stain on white print (Refer to Fig. 7-2
B
) .................................................. 349
(2-1) Stain on white print (Partial stain) ........................................................ 349
(2-2) Stain on white print (Entire stain) ......................................................... 349
7.5.3.(3) All white page print (Refer to Fig. 7-2
C
) .................................................. 350
(3-1) All white page print on paper ............................................................... 350
7.5.3.(4) Vertical line is printed ................................................................................ 350
(4-1) Thin vertical line (with color) (Refer to Fig. 7-2
D
) ............................... 350
(4-2) Thin vertical line (with color)(Refer to Fig. 7-2
F
) ................................. 350
7.5.3.(5) Cyclic abnormal print (Refer to Fig. 7-2
E
) ............................................... 351
(5-1) Cyclic abnormal print in vertical direction. ........................................... 351
7.5.3.(6) Color registration error is heavy .............................................................. 351
(6-1) Message “Color adjustment in progress” at power on is
display short time ................................................................................. 351
(6-2) Color registration error even though the Engine
Maintenance Function “REG. ADJUST TEST” shows OK ................... 351
7.5.3.(7) All black page print ................................................................................... 352
