Oki Data CONFIDENTIAL
42049001TH Rev.1
85 /
2
Dirty background (Fig. 5-2 B )
•
Were the image drums exposed to external light for a long time?
YES Replace exposed image drum unit(s).
▼
•
NO
Are the rollers of the fuser unit dirty?
YES Replace the fuser unit.
▼
•
NO
Is MEDIA WEIGHT set correctly?
LIGHT: 64 to 74 g/m
2
. MEDIUM: 75 to 104 g/m
2
. HEAVY: 105 to 120 g/m
2
.
ULTRAHEAVY: 121 to 203 g/m
2
. TRANSPAREMCY.
NO
Set the MEDIA WEIGHT correctly.
▼
•
YES
Are the LED head assys connected to the CU board (ARC PWB / OWL PWB) properly?
NO
Connect not properly connected LED head assy(s) to the CU board (ARC PWB / OWL PWB)
correctly.
▼
•
YES
Are +5V and +3.3V being output to the CU board (ARC PWB / OWL PWB) K, Y, M and C
LED HEAD connector pins?
+3.3V: 14
+5V: 16, 18, 20, 22 and 24
NO
Replace the CU board (ARC PWB / OWL PWB).
▼
•
YES
Replace the LED head assys after checking cable connection. Has the problem been
corrected?
YES End.
▼
•
NO
Replace the engine board. Has the problem been corrected?
YES End.
▼
•
NO
Replace the high voltage power unit or the belt unit after checking cable connection.
Has the problem been resolved?
YES End.
▼
•
NO
Be sure cable connection is established. Are the pins of the image drum units connected
to the contact assy properly (see figure 5-3)?
NO
Connect not properly connected pin(s) to the contact assy correctly.
▼
•
YES
Replace the image drum units.
Note: When replacing the engine board (RSN PWB), extract EEPROM data from it and copy the
data onto a new engine board.
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