LG 32LX330C Service Manual page 24

9. TV Audio
Check the RF cable and RF signal
YES
Check the Tuner 3.3V ,1.2V
; L3701, L3702, L3704 : +3.3V,
IC3701 #28pin : 1.2V
YES
Check the IF signal
TU3701 #6.7 pin
Check the CLK SYNC DATA
TU3701 14,15,17~24
YES
Check the Speaker resistor or
connector
10. Component/RGB Audio
Check the cable is defective
YES
Check the signal of JK4302
R4343, R4344
YES
Implement the "8. Audio of all input"
Of Malfunction guide
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Only for training and service purposes
NO
Menu toggle
NO
Exchange the
L3701, L3702, L3704
NO
Exchange the Tuner
NO
Exchange the speaker
NO
Exchange the Jack
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