Chec
k
i
f
there is input
a
t Pin
2
ǃ
pin1
2
o
f
UD3
Chec
k
i
f
there is output
a
t Pi
n1
ǃ
Pin
2
o
f
J1
7
No
No
Yes
Chec
k
the
a
udio input circuit
No sound but h
a
ve picture
Ch
a
n
g
e M
a
inbo
a
rd
S
till h
a
vin
g
p
roble
m
s
Chec
k
i
f
there is
sound input si
g
n
a
l
No
Chec
k
the input source
Chec
k
the circuit bet
w
een
UD3
a
nd J1
7
Yes
Yes
No
Chec
k
the
spe
ak
ers
S
ervice M
a
nu
a
l
Model No.:
- 44 -
bet
w
een UD3
a
nd U13
Check if Pin1 Pin2 of UD3(12V) is normal
Check the Mute circuit between
UD3 and U13
