Read LG 55LEX8-SA (CHASSIS:LJ03S) Service Manual online
14. Trouble shooting - No audio (AV, Component)
Check AV Cable for damage
or open conductor
Check Audio OSD
(Audio OSD active or inactive mode?)
ok
ok
No (Inactive)
Check (AV : R2512 & R2506)
(Component : R2501&R2505)
Check Audio AMP Mute (pin25)
Replace JK2501
No
ok
Check Audio Master clock // AUD_LRCH
AUD_LRCK, AUD_SCK(AMP pin17,18,19)
Replace BCM3549
Check JK2501
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
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