Oki C9850 Maintenance Manual page 209

White Band, White Stripe, Uneven Color Band, Uneven Color Stripe Occurring in Vertical
Direction (Figure 7-2
• Is the LED head lens dirty?
YES
• NO Are all LED head Assy parts properly connected to the relay PCB (S2H PWB)
and engine PCB (S2V PWB)?
NO
• YES Replace the LED head.
Has the problem been corrected?
YES
• NO Replace the head shield cable.
Has the problem been corrected?
YES
• NO Check the cable connection, then replace the engine PCB (S2V PWB).
Has the problem been corrected?
YES
• YES Check the cable connection, then replace the Engine PCB (S2V PWB). Has operation
been restored?
YES
• NO Is the I/D unit terminal properly connected to the contact Assy? (Refer to Figure 7-3)
NO
• YES Replace Image Drum Unit.
Note! 1. When replacing the Engine PCB (S2V PWB), remove the EEPROM from the old
PCB, then mount that EEPROM on the new PCB.
2. If the EEPROM is not going to be replaced, refer to Section 5.2.2.
43627911TH Rev. 3
)
Clean the LED head lens.
Check the cable connection of the LED and the cable connection between
the relay PCB and engine PCB, then properly connect the cable between
the LED head and engine PCB.
END
END
END
END.
Properly connect the ID unit terminal to the contact Assy.
Oki Data CONFIDENTIAL
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