Oki B4100 - Manual (Page 290)

40055101TH Rev.4 290 /
7.2.2 No LCD Operation
Turn ON power switch.
TIME on LCD?
AC power switch ON?
Solved?
Yes
Solved?
Start
Retrun to section 7.2.1
No
SUB +5V at Pin 1
of CN16 (MCNT)?
No
Check SPSU, MCNT
boards and their connectors.
No
Replace MCNT
Yes
Replace 05W
Check MCNT board and
the cable between MCNT
and 05W boards.
SUB +5V at Pin 6 and 7 of
CN1 (05W)?
Yes
Yes
No
Yes
Yes
No
No
Retrun to section 7.2.1