44952001TH Rev.2
7-80
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURES
7.5.6 Image Problem Troubleshooting
(1) Color is faint and fades across pages (see Fig. 7-2 A). ...............................7-81
(1-1) Color is faint and fades. .....................................................................7-81
(2) The white area of printed pages is dirty (see Fig. 7-2 B). ............................7-82
(2-1) The white area of printed pages is dirty (partially). ............................7-82
(2-2) The white area of printed pages is dirty (all over). ............................7-82
(3) Printed pages are blank (see Fig. 7-2 C). ....................................................7-83
(3-1) A printed pages are entirely blank. ....................................................7-83
(4) Vertical lines are produced in printed pages. .............................................. 7-83
(4-1) Fine lines (colored) (see Fig. 7-2 D) ..................................................7-83
(4-2) Fine lines (white) (see Fig. 7-2 F) ......................................................7-83
(5) Print quality problems appear periodically (see Fig. 7-2 E). .......................7-84
(5-1) Print quality problems appear vertically and periodically. .................7-84
(6) Color misregistration is significant. .............................................................7-84
(6-1) Themessage“Adjustingcolor”displayedatpoweronstays
for a short time. .................................................................................. 7-84
(6-2) Although the REG ADJUST TEST result of the engine
maintenance function is OK, color misregistration occurs. ................7-84
(7) Black filled-in printing ...................................................................................7-85
(7-1) Printed pages are filled-in black entirely. ..........................................7-85
Note! To replace the CU/PU board with a new one, load EEPROM chip data on the
old board and copy it to the new board.
A Faint and faded
across the page
B
Dirty white area
C
Entirely blank
D
Vertical black
stripe/line
E
Periodic problems
F
Vertical white
band/line
Fig.7-2
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