Sanyo LCD-22XR7SN, Service Manual

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19
2. Raster, but no picture
Check if the unit button
and remote control
operation?
Check if there is no
signal in all channels?
Replace
main board
Enter factory-menu,
initialization EEPROM,
then turn off the TV,
turn on again, display
picture?
Adjust main board
again
Which is no signal
of channels?
Replace
main board
Check if 2VPP signal
and noise wave of
N101(PIN7) on the
main board?
Check if output
IF signal of
TUNER (pin11)
is normal?
Replace TUNER
Check IF circuit
(N101)
no
yes
yes
HDMI/VGA/YPRPB
TV
yes
no
no
no
yes
Does display OSD
menu in screen when
press menu button?
yes
no
yes
no
2. Ra 2 ster, but no picture
e wav w se no d and
ye