LG LAS350B - Sound Effect and Volume Customization

3-9
FRONT CIRCUIT
ELECTRICAL TROUBLESHOOTING GUIDE
1
2
Refer to power(SMPS).
Refer to power(SMPS).
Reconnect it.
Refer to MICOM circuit.
Replace R306~R309.
Check REM circuit
Refer to MICOM circuit.
Resolder or Replace IR301.
Check
if the power part of the front
is ok?
Check
if thepower part of the front
is ok?
Check if CON303 is ok?
Check if the remote
control waveform of CON301
pin3 is ok?
Check if R306~R309 ok?
Check if REM
voltage is ok(3.3 V)?
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES