Service manual

18
TROUBLESHOOTING HINTS
No
No
Yes
Yes
Is Vcc 5V line
normal(pin 8 of CON1)?
Trouble in Scaler(U6).
Check the power board
(Vcc 5V of CN2A).
Check on Scaler(U6).
Is the
Power LED toggled
between on and
off?
Off
No
Yes
On
Is the power
cord well
connected?
Refer to No video
or No raster.
Check if the power switch
is on position and
Connect the power
cord correctly.
Check the
waveform of pin 17
of -com(U4).
Trouble in
Power on
Yes
2. Trouble in Power on