LG 47LW6500-UA Service Manual page 75

15. Trouble shooting - No audio (Head phone audio out)
Check Head phone Cable
for damage or open conductor
ok
Check Audio OSD
(Audio OSD active or inactive mode?)
ok
Check Earphone AMP Mute
(Pin 19)
ok
Check Earphone output
(Pin 5, 16)
ok
Follow procedure & refer to Audio signal block
Diagram
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Only for training and service purposes
No(active)
Check R821 & R822, JK803
No
Replace IC804 TPA6132A
LGE Internal Use Only