19
DV-220V-K
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 1,2 and pin 3 of CP502 about 3.3
V
and at pin 11 of CP502
about 5
V
?
N
o
Yes
N
o
Is there waveform at
X4001 about 3.0
V
p-p ?
Check X4001, IC4001 and
peripheral circuit.
Yes
Write D
V
D FIRMWARE DATA.
Check AT+3.3
V
line of POWER BLOCK.
Check IC503 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 CP2302
connection to DECK.
Change D
V
D LOADER.
V
?
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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
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TEL 13942296513 QQ 376315150 892498299
