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N
N
N
N
N
N
N
N
N
OK
OK
OK
OK
OK
OK
OK
Y
Y
N
N
Y
Y
N
N
OK
OK
Has video but no colo
r
Check the Color / Saturation
in picture menu if it has
decreased to “0”
Increase the item
to default “50”
Check the cable input if
it has exactl
y
connected
Well connect the cable Check the current input
source if it is TV
Done
Change the main
IC “U41”
Adjust AGC
follow the workin
gg
uide.
Change the
mainboard
Done
Done
Done
Check the DC power
su
pp
l
y
of the tuner.
Done
Fix the DC supply
Check the Q29 & U25 circuit
Check the Q29 & U25 circuit
Done
Change the Q29 & U25
Done
Done
Change the
mainboard
Change the tuner
Done
Change the mainboard
Done
Done
Service Flow Chart
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