Sanyo LCD-19XR7, Service Manual

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1
7
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, display
picture?
Adjust main board
again
Which is no signal
of channels
Replace
main board
Check if 1VPP signal
and noise wave of TP1
in the TV board?
Check if output
IF signal of
TUN1(pin 11) is
normal?
Check TUNER401
and its periphery
Check IF(N3) and
its periphery
no
yes
yes
VGA/YPRPB/SCART
TV
yes
no
no
no
yes
Does display OSD
menu in screen when
press menu button?
yes
no
yes
no