Oki C9850 Maintenance Manual page 216

Stripe in Horizontal Print Direction (Figure 7-2
• Are all LED head Assy parts properly connected to the relay PCB (S2H PWB) and engine PCB
(S2V PWB)?
NO
• YES Is the LED head pressing spring properly set?
NO
• YES Are the protrusions on both sides of the LED head properly in contact with each
FG plate spring?
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 Remount or replace the belt unit.
Has the problem been corrected?
YES
• NO Is the I/D unit terminal properly connected to the contact Assy? (See Figure 7-3)
NO
• YES Replace the image drum unit.
Has the problem been corrected?
YES
• NO Return to factory (investigate source of noise in the machine).
43627911TH Rev. 3
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.
Properly set the pressing spring.
Correct the bend in the FG plate spring.
END
END
END
END
Properly connect the I/D unit terminal to the contact Assy.
END
Oki Data CONFIDENTIAL
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