Tv, External Input Video Signal - LG RH1757 Service Manual

11. NO TV, EXTERNAL INPUT VIDEO SIGNAL
NO
No video signal of external
input AV3 (Rear RCA input)
YES
NO
C618 : Is there a
signal ?
YES
NO
No video signal of external
input AV4(Composite/S-Video)
YES
YES
C917,C923,C934 :
Is there a signal ?
NO
IC901 pin 34 Or R999
(reset"H") :
YES
X901 (24.576MHz)
clock oscillated ?
YES
R962,R978 (I C) :
2
YES
NO
IC901 pin 108 or
R930 (VI_CLK) :
YES
CHECK No RGB /
Component /
Composite /
S-Video
Signal when play
DISC
3-13
CHECK Cable con-
nection & Input signal
CHECK IC1302
Reset Circuit
CHECK IC901 power
3.3V & 1.8V
YES
IC901 DEFECT