Oki ML420 Maintenance Manual page 112

Data receiving failure
0
Is the SEL LED blinking?
No Yes
Printer went into the print suppress mode.
Wait until printer to receives DC1 code, or change the menu item "Print sup-
press-Ineffective" when the function is not required.
Is the I/F RS232C?
No Yes
To step
Does the SEL LED light up?
Yes No
Press SEL key.
Remedied?
No
No
10-1
Disconnect I/F cable.
Does the SEL LED light up?
No
Replace Control Board.
Remedied?
No Yes
End
Replace I/F cable.
42113901TH01 Rev.3
10-2
Yes
Does the printer receive data properly?
Yes
To step 10-1
Yes
Change menu item I-prime to invalid, or check for defective cable.
End
Oki Data CONFIDENTIAL
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