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8. All Source Audio
Check the TV Speaker Menu
(Menu -> Sound -> TV Speaker)
On
Check AMP IC(IC501) Power
24V(or 20V), 3.3V, 1.8V.
ok
Check Mstar AUDIO_MASTER_CLK
R148
ok
Check AMP I2C Line
R506, R507
ok
Check Mstar I2S Output
R503, R504, R505
ok
Check Output Signal P501
1, 2, 3, 4 pin.
ok
Check Speaker cable
ok
Check speaker.
Copyright ⓒ 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Off
Toggle the Menu
No
Check Regulator IC404(1.8V), IC405(3.3V), POWER B/D(24V)
No
Replace Mstar(IC101) or Main Board.
No
Check signal line. Or replace Mstar(IC101) or IC501
No
Check signal line. Or replace Mstar(IC101) or IC501
No
Replace Audio AMP IC(IC501)
No
Replace connector
if found to be damaged.
No
Replace speaker if found to be damaged.
LGE Internal Use Only
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