Read LG 19LV2500-ZG / 19LV250A-ZG / 19LV250N-ZG / 19LV250U-ZG (CHASSIS:LD01R) Service Manual online
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9. All Source Audio
Check the TV Speaker Menu.
(Menu -> Sound -> TV Speaker)
On
ok
ok
Check Output Signal P501
1, 2, 3, 4 pin.
Replace Audio AMP IC(IC501).
ok
No
Check Connector & P501.
Replace connector.
if found to be damaged.
if found to be damaged.
ok
No
Check speaker resistance
and connector damage.
Replace speaker.
ok
No
Off
Toggle the Menu.
Check AMP IC(IC501) Power
24V or 20V or 15V, 3.3V
No
Replace Amp IC(IC501).
Check Mstar I2S Output
IC501 9,10,11 Pin.
No
Check signal line. Or replace Mstar(IC101).
Check Mstar AUDIO_MASTER_CLK
R148.
No
Replace Mstar(IC101) o r Main Board.
ok
Check AMP I2C Line
R140, R141.
No
Check signal line. Or replace Mstar(IC101).
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