Oki Data CONFIDENTIAL
45850101TH Rev.1
2-73
2. TROUBLESHOOTING PROCEDURES
2.5.6 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 2-1
Note! To replace a CU/PU board, data of the EEPROM chip on the old CU/PU board
must be read beforehand copied to the new board after replacement.
(1) Color has faded-out and blurred entirely. (Refer to Figure 2-1 A.) .................2-74
(1-1)
Color are faded-out and blurred. ......................................................2-74
(2) Stain on white print. (Refer to Figure 2-1 B.) ..................................................2-75
(2-1)
Stain on white print (Partial stain).....................................................2-75
(2-2)
Stain on white print (overall stain) ....................................................2-75
(3) White print (Refer to Figure 2-1 C.) ................................................................2-76
(3-1)
White print over entire page .............................................................2-76
(4) Black banding/black streaking in vertical direction .........................................2-77
(4-1)
Thin vertical line (with color) (Refer to Figure 2-1 D.) .......................2-77
(4-2)
Thin vertical line (without color) (Refer to Figure 2-1 F.) ..................2-77
(5) Periodic abnormalities (Refer to Figure 2-1 E.) ..............................................2-77
(5-1)
Periodic abnormality occurs in vertical direction ..............................2-77
(6) Significant color misregistration ....................................................................2-78
(6-1)
Color misregistration occurs. ...........................................................2-78
(6-2)
Thought REG ADJUST TEST of engine maintenance function
results ok, color misregistration occurs. ..........................................2-78
(7) Solid black printing. ........................................................................................2-78
(7-1)
Solid black printing over the whole page ..........................................2-78
