AWA MSDV2413-03-D0 Service Manual page 48

Service Manual
Model No.:
4) No sound
Check if the power supply
system is damaged, short
circuit or mis-connected
Check the volume control
circuit from
U19
Check the volume input
circuit from U8 to
U19
Check the
input
N
source
Reset
Y
volume
Check the
Y
speakers
N
Y
R376
N
- 47 -
No sound
N
Check if there is sound input
signal
Y
Check if the volume control is
at 0 level or muted
N
Check if there is output at
J26
N
Check if there is +12V input at
PIN7of U19
Y
Check if MUTE PIN of U19 is low
8
voltage
N
Check if there is signal input at PIN1
& PIN9 of U19
Y
U19
Replace