Read LG 42PJ350-SA (CHASSIS:PB02A) Service Manual online
Customer Oriented R&D
Breakthrough
9. All Source Audio Trouble Shooting
Make sure you can’t hear any audio
Y
Check Connector P703
N
Y
Y
Check Speaker
Replace Connector
Check Signal
L700, L701
N
Replace one of
Capacitor, Register
& Recheck
Y
Check IC700 Power
17V, 3.3V
L702,L703
N
Replace It & Recheck
Y
Check Mstar S7 I2S Output
R724, R725, R726
N
Replace It & Recheck
Y
Maybe Mstar S7(IC101)
has problems
Replace Speaker
N
N
Maybe TAS9709 has problems.
Replace It
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