31
DV-420V-K
5
6
7
8
5
6
7
8
A
B
C
D
E
F
NO DIGITAL AUDIO ON
PLAYBACK OF COAXIAL JACK .
Ch
a
nge IC4002.
Check connection
a
t RCA C
ab
le.
Check Q8025
a
nd peripher
a
l
circ
u
it.
No
ANALOG AUDIO
Ye
s
I
s
there w
a
veform
a
t pin 215
of IC4002
ab
o
u
t 0.
3
V p-p ?
I
s
there w
a
veform
a
t pin 2 of
J8001
ab
o
u
t 0.
3
Vp-p ?
No
Ye
s
Ch
a
nge IC8008.
I
s
there AUDIO
s
ign
a
l
a
t
pin
s
1
a
nd 7 of IC8008 ?
ANALOG AUDIO
PLAYBACK.
NO
ON
Check J8001
a
nd peripher
a
l
circ
u
it.
Ye
s
ign
a
l
a
t pin
s
nd 6 of IC8008 ?
Ye
s
Check AT pin
s
22
3
a
nd 225
of IC4002.
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9
2
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4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
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1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
