42089201TH Rev.4 101 /
Oki Data CONFIDENTIAL
6.5 Troubleshooting flow chart
1 Power is not supplied.
Is the AC cable connected correctly?
Yes No
Connect the AC cable correctly.
Is fuse F1 on the transformer assy/or F1 on the control/power supply board blown?
No Yes
Replace fuse (with same type and rating).
Remedied?
No Yes
End
Does DC + 8V out?
No Yes
Remove Printhead. (Turn power off, then on.)
Remedied?
No Yes
End
Replace carriage cable or ribbon feed mechanism.
Remedied?
No Yes
End
Replace Control/Power supply board.
Remove CN3 on Driver board.
Measure for any short circuits between + 5V, + 40V, + 8V, 0V (EL or EP).
Any short circuit?
No Yes
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