LG 39LB5600 Service Manual page 20

7. All Source Audio
Check the TV Speaker M enu
(M enu -> Audio -> TV Speaker)
On
Check AMP IC(IC5600) Power
24V, 3.3V
ok
Check Mstar AUDIO_MASTER_CLK
R148
ok
Check AMP I2C Line
R140, R141
ok
Check Mstar I2S Output
IC5600 20,21,22 Pin
ok
Check Output Signal P5600
1, 2, 3, 4 pin.
ok
Check Connector & P5600
ok
Check speaker resistance
and connector damage.
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Only for training and service purposes
Off
Toggle the Menu
No
Replace Amp IC(IC5600)
No
Replace M star(IC101) or M ain Board.
No
Check signal line. Or replace Mstar(IC101)
No
Check signal line. Or replace Mstar(IC101)
No
Replace Audio AMP IC(IC5600)
No Replace connector
if found to be damaged.
No
Replace speaker.
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LGE Internal Use Only