Trouble Shooting - No Audio (Av) - LG 42LE5400 Service Manual
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Also See for 42LE5400:
- Owner's manual (136 pages) ,
- Specifications (2 pages) ,
- Owner's manual (41 pages)
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14. Trouble shooting - No audio (AV)
Check AV Cable for damage
or open conductor
ok
Check Audio OSD
(Audio OSD active or inactive mode?)
ok
Check JK100
ok
Check Audio Master clock // AUD_LRCH
AUD_LRCK, AUD_SCK(AMP pin17,18,19)
ok
Check Audio AMP Mute (pin25)
Check Audio AMP voltage
+1.8V_AMP, +3.3V_NORMAL,+24V_AMP
Check output L8804, L8805 &
AMP output
Follow procedure & refer to Audio signal block
Diagram
Copyright ⓒ 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
No (Inactive)
No
No
ok
ok
No
ok
Check R1058 & R900, JK300
Replace JK100
Replace BCM3549
Replace Audio AMP NTP7000
LGE Internal Use Only
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Troubleshooting
