Sanyo LCD-26XR7 - Manual Fine Tuning; Setting Auto Frequency Control (AFC)

18
3.2. Raster, but no picture
Check if the unit button
and remote control
operation?
Check if the all
channels have signal?
Replace
main board
Enter factory-menu,
initialization EEPROM,
then turn off the TV,
turn on again, displa
y
p
icture?
Adjust main boar
d
again
Which is no signal
of channels
Replace
main board
Check if 1VPP signal
and noise wave o
f
X405(PIN 8) in the
TV board?
Check if outpu
t
IF signal o
f
TUNER401(pin
11) is normal?
Check TUNER401
and its periphery
Check N404 an
d
its periphery
no
yes
yes
HDMI/VGA/YPRPB
TV
yes
no
no
no
yes
Does display OSD
menu in screen when
p
ress menu button?
yes
no
yes