43856301TH Rev.3
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Oki Data CONFIDENTIAL
7. Troubleshooting and repair procedure
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
Figure 7-2
Note!
When an attempt is going to be made to replace the PU board, read data
contents of the EEPROM chip from the old PU board beforehand, and copy
the data contents into the new board after the new PU board is installed.
(1) Color has faded-out and blurred entirely. (Refer to Figure 7-2A.) ........................181
(1-1) Color are faded-out and blurred. ..............................................................181
(2) Stain on white print (Refer to Figure 7-2B.) .........................................................182
(2-1) Stain on white print (Partial stain) .............................................................182
(2-2) Stain on white print (overall stain) .............................................................182
(3) White print (Refer to Figure 7-2C.) ......................................................................183
(3-1) White print over entire page ......................................................................183
(4) Black banding/black streaking in vertical direction ..............................................184
(4-1) Thin vertical line (with color) (Refer to Figure 7-2D.) ................................184
(4-2) Thin vertical line (without color) (Refer to Figure 7-2F.) ...........................184
(5) Cyclic abnormality (Refer to Figure 7-2E.) .........................................................184
(5-1) Cyclic abnormality occurs in vertical direction .........................................184
(6) Heavy color registration error ..............................................................................185
(6-1) Display of the message "Color adjustment is in progress"
appears only short time. ...........................................................................185
(6-2) Though REG ADJUST TEST of engine maintenance function is ok,
color blur occurs .......................................................................................185
(7) Entirely black print ...............................................................................................185
(7-1) All black print over entire page ..................................................................185
