Read LG 19LE5300 (CHASSIS:LA01A) Service Manual online
8. All Source Audio
Check the TV Speaker Menu
(Menu -> Sound -> TV Speaker)
On
ok
ok
Check Output Signal P7800
1, 2, 3, 4 pin.
Replace Audio AMP IC(IC501)
ok
No
Check Connector & P7800
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(IC7801) Power
*24V, 3.3V, 1.8V.
No
Check Regulator IC7800(+1.8V_AMP)
Check Mstar I2S Output
R7801, R7802, R7803
No
Check signal line. Or replace Mstar(IC101)
Check Mstar AUDIO_MASTER_CLK
TP7800 or IC7801 PIN 7
No
Replace Mstar(IC101) or Main Board.
ok
Check AMP I2C Line
R7804, R7805
No
Check signal line. Or replace Mstar(IC101)
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