LG DA-3520 Service Manual page 12

Front Circuit (2/2)
Check
if the Power part of the
Front is OK.
Check if
R401~R415
OK.
Refer to Micom
Circuit
Check
if the Power part of the
Front is OK.
Check if the
CN401 pin11
is Low.
Check if
headphoneJack
in JK401 is
OK.
Refer to M-COM
Circuit.
Refer to
power(SMPS).
Replace R401~R415.
Refer to
power(SMPS).
Check JK401 Circuit.
Check Main B/D.
Check if the
Power part of the
Front is OK.
Check if
CN401 Pins3, 4
Waverfrom
OK.
Check if
R430, R431
OK.
Refer to Micom
Circuit.
Check if the
Power Part of the
Front is OK.
Check if the
Remocon waveform of
the CN401.
Check if the
RMC401Volume
is OK (5V).
Replace RMC 401.
- 2-4 -
Refer to SMPS.
Replace R430, R431.
Refer to SMPS part.
Refer to Micom
Circuit.
Check RMC Circuit.