No Lcd Operation - Oki B 4100 Maintenance Manual

7.2.2

No LCD Operation

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