19
TROUBLESHOOTING HINTS
3. No Raster
Is 12V
plugged in pin5
of CN2(power
board)?
No
No
Yes
Yes
Is the output of
inverter correct?
Check the output
of D811 12V line
(power board).
Replace the inverter.
Replace a LCD panal.
Check the
output of Q1 or
pin 15 of U4.
Trouble in pin 15
of -com.
No Raster
Yes
low
high
