LG 32LD350 Service Manual page 40

8. All Source Audio
Check the TV Speaker Menu
(Menu -> Sound -> TV Speaker)
On
Check AMP IC(IC600) Power
*20V, 3.3V, 1.8V.
ok
Check Mstar AUDIO_MASTER_CLK
R603
ok
Check AMP I2C Line
R607, R608
ok
Check Mstar I2S Output
R604, R605, R606
ok
Check Output Signal P600
1, 2, 3, 4 pin.
ok
Check Connector & P600
ok
Check speaker resistance
and connector damage.
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Only for training and service purposes
Off
Toggle the Menu
No
Check Regulator IC601
No
Replace Mstar(IC100) or Main Board.
No
Check signal line. Or replace Mstar(IC100)
No
Check signal line. Or replace Mstar(IC100)
No
Replace Audio AMP IC(NTP-3100L)
IC600.
No
Replace connector
if found to be damaged.
No
Replace speaker.
*20V Voltage is dependent on Model
26/32LD350 => 24V
19/22LD350 => 15V
LGE Internal Use Only