XOCECO PH-42HK6S, Service Manual

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16
2.2. Have raster, but no picture
Check if the unit button
and remote control
operation?
Check if the all channels
have no signal?
Check N304 and
its periphery
Enter factory-menu,
initialization EEPROM,
then turn off the TV,
turn on again, display
picture?
Adjust main board
again
Which channel is
no signal?
Check N304 and
its periphery
Check if TUNER601
(pin11) IF output is
normal?
Check N602 and
its periphery
no
yes
yes
HDMI/VGA/YPRPB
TV
yes
no
yes
Does display OSD
menu in screen when
press menu button?
yes
no
yes
no
Check if there is 1VPP
signal or noisy of X405
TP601 on main board?
no
Check TUNER601
and its periphery
no