Read LG 47LX9500-UA (CHASSIS:LA02R) Service Manual online
16. Trouble shooting - No audio (AV)
Check AV Cable for damage
or open conductor
Check Audio OSD
(Audio OSD active or inactive mode?)
ok
ok
No (Inactive)
Check R1058 & R900, JK300
Check Audio AMP Mute (pin25)
Replace JK100
No
ok
Check Audio Master clock // AUD_LRCH
AUD_LRCK, AUD_SCK(AMP pin17,18,19)
Replace BCM3549
Check JK100
No
ok
Check Audio AMP voltage
+1.8V_AMP, +3.3V_NORMAL,+24V_AMP
ok
ok
Check output L8804, L8805 &
AMP output
ok
Replace Audio AMP NTP7000
No
Follow procedure & refer to Audio signal block
Diagram
Click on the first or last page to see other 47LX9500-UA (CHASSIS:LA02R) service manuals if exist.