Oki MC873dn - 2.5.6 Troubleshooting Abnormal Images

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