Tuner Audio Output - LG RH1757 Service Manual

7. NO TUNER AUDIO OUTPUT
TU701 pin*(16) (SIF) :
Is there a signal?
YES
C928, C963 :
Is there a signal?
YES
IC901 pin 64 Or R999
(reset "H") :
YES
X901 (24.576MHz) clock
oscillated ?
YES
R902,R913,R997 :
R962,R978 (I 2 C) :
YES
IC901 pin 173 & R903 :
Is there a signal ?
YES
When playing DISC,
no Audio output
*OPTION1 : W's : pin16
NTSC : pin113
NO
CHECK
IC1302 Reset Circuit
NO
IC1101 DEFECT
NO
CHECK
IC901 power 3.3V & 1.8V
YES
IC901 DEFECT
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