Oki ML421 Maintenance Manual - Page 111
Connect the cable properly.
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Oki Data CONFIDENTIAL 9 Malfunction of switch on operation panel Is the CN1 of Operation panel connected to the CN3 on the Control Board? Yes No Connect the cable properly. Replace Operation panel board. Remedied? No Yes End Replace Control Board. 42113901 Rev.2 111 /
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42113901
Rev.2
111 /
Oki
Data
CONFIDENTIAL
9
Malfunction of switch on operation panel
Is the CN1 of Operation panel connected to the CN3 on the Control Board?
Yes
No
Connect the cable properly.
Replace Operation panel board.
Remedied?
No
Yes
End
Replace Control Board.