No Lcd Operation - Oki OKIFAX 5750 Maintenance Manual

7.2

No LCD Operation

Start
TIME on LCD?
Yes
Return to section 7.1
41285901TH Rev.3
No
AC power cord ON?
Yes
+5V SUB at Pin A8
of CN1 (R76)
Yes
+5V SUB at Pin 6 and 7
of CN1 (OPE UNIT)?
No
Check MCNT (R76) board
and the cable between MCNT
(R76) and OPE boards.
No
Reconnect the AC
power cord.
No
Check MPW2420/2520,
MCNT (R76) boards and
their connectors.
Yes
Replace OPE UNIT (P76).
Solved?
No
Replace MCNT (R76)
Solved?
No
Yes
Yes
Return to section 7.1
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