Oki B4100 - Manual (Page 238)

40055101TH Rev.4 238 /
7.1.2 No LCD Operation
Reconnect the AC
power cord.
TIME on LCD?
AC power cord ON?
Solved?
Yes
Solved?
Start
Return to section 7.1.1
No
+5V SUB at Pin 12
of CN7 (R44)?
No
Check SPSU, MCNT (R44)
boards and their connectors.
No
Replace MCNT
Yes
Replace OPE UNIT (O4W).
Check MCNT board and
the cable between MCNT
and OPE boards.
+5V SUB at Pin 6 and 7 of
CN1 (OPE UNIT)?
Yes
Yes
No
Yes
Yes
No
No
Return to section 7.1.1