LG 40LH5300 Service Manual page 17

6. All Source Audio
Check the TV Speaker Menu
(Menu -> Audio -> TV Speaker)
ON
Check AMP IC(IC5600) Power
24V, 3.3V
OK
Check Mstar AUDIO_MASTER_CLK
R148
OK
Check AMP I2C Line
AR111, R5604, R5605
OK
Check Mstar I2S Output
IC5600 20,21,22 Pin
OK
Check Output Signal
P5600
6, 7, 38 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 Mstar(IC101)
or Main Board.
NO
Check signal line.
Or replace Mstar(IC101)
NO
Check signal line.
Or replace Mstar(IC101)
NO
R e p l a c e A u d i o A M P
IC(IC5600)
NO
Replace connector
if found to be damaged.
NO
Replace speaker.
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LGE Internal Use Only