23
DV-49AV
5
6
7
8
5
6
7
8
A
B
C
D
E
F
5. DIAGNOSIS
5.1 TROUBLE SHOOTING
POWER DOES
N
OT TUR
N
O
N
Is the voltage at
pin
8
and pin 9 of CP502 about 3.3
V
and at pin 5 of CP502
about 5
V
?
N
o
Yes
N
o
Is there waveform at
X4001 about 3.0
V
p-p ?
Check X4001, IC4002 and
peripheral circuit.
Yes
Write D
V
D ROM DATA.
Check AT+3.3
V
line of POWER BLOCK.
Check Q515 and peripheral circuit.
N
o
Yes
N
o
DECK DOES
N
OT ACCEPT
OPE
N
/CLOSE
Check P.CO
N
6
V
line of
POWER BLOCK.
Yes
Check CD2302
connection to DECK.
Change D
V
D LOADER.
V
?
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
