LG Electronics 47LN549E-ZA 7. Audio of All input

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7. Audio of All input
Check the Mstar Audio_Master_CLK signal.
R148
Check the Audio output signal.
IC501 1, 2, 3, 4pin
Check the AMP I2C Line.
R140, R141
Check the connector P501.
Check the Mstar I2S output.
IC501 9, 10, 11pin
Check the Speaker resistor or connector.
Check the speaker menu.
(menu -> sound -> TV speaker)
Check the voltage of AMP IC(IC501).
24V, 3.3V
Exchange the Mstar(IC101) or Main
board.
Exchange the Audio AMP.
IC501
Check the I2C signal or exchange the
Mstar(IC101).
Exchange the connector If
the connector is defect.
Check the I2C signal or
Exchange the Mstar(IC101).
Exchange the speaker.
Menu toggle
Exchange the AMP IC or Main board.
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes