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LC-60H20T/LC-70H20T
With [RF] signal input
No video in the UHF/VHF reception
Is there IF output from the tuner pin( 8 ) , ( 9 ) of TU1102 as specified?
Is there IF input at pin W1 & W2 of IC3301 ?
Are there the signal output
( P19-P20,R19-R21,T19-T21,V19-V21
W18-W21,Y18-Y21,AA18-AA20) of IC3301 to SC3801 ?
Check LVDS cable, LCD controller (incl. panel) and their periph-
eral circuits.
With <Video> signal input
No external input video onscreen <INPUT 7>
Is INPUT 7 selected on the input select menu screen?
Is there the video signal input at pin (R2) of IC3301?
there
there
Are
the signal outputs pin ( P19-P20 , R19-R21 ,T19-
T21,U19-U20,V19-V21,W18-W21,Y18-Y21,AA18-AA20 ) of IC3301 to SC3801?
Check LVDS cable, LCD controller (incl. panel) and their periph-
eral circuits.
No video onscreen (1)
YES
YES
U19-U20
YES
No video onscreen (2)
YES
YES
YES
NO
Check TU1102 and its peripheral circuits.
N
O
C
e h
k c
t
e h
r i c
u c
t i
e b
w t
e e
n
NO
Check IC3301 and its peripheral circuit to SC3801
NO
Select INPUT 7 on the input select menu screen to pick up the
right input signal.
NO
Check the line between pin (9) of J502 and pin (R2) of IC3301.
NO
Check IC3301 and its peripheral circuits to SC3801
6 – 2
T
U
1 1
2 0
&
C I
3
0 3
. 1
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