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LG NB3532A Service Manual page 23

Stylish & slim sound bar
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RECEIVER BAR TROUBLESHOOTING
Optical function
IC301
Pin35, 94 OPT_IN signal
OK?
IC301
Pin69, 70, 71, 74 PWM signal
OK?
Check AMP IC output stage
and speaker terminal.
YES
YES
YES
NO
Check JK301, JK302 or replace.
NO
Check IC301 or replace.
3-10

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S33a1-d

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