29
DV-420V-K
5
6
7
8
5
6
7
8
A
B
C
D
E
F
5. DIAGNOSIS
5.1 TROUBLESHOOTING
POWER DOE
S
NOT TURN ON
I
s
there w
a
veform
a
t
X4001
ab
o
u
t
3
.0V p-p ?
Write DVD FIRMWARE DATA
Check AT+
3
.
3
V line of POWER
a
nd peripher
a
l circ
u
it.
Check X4001, IC4002
a
nd
peripher
a
l circ
u
it.
Ye
s
s
Ye
s
No
No
No
I
s
the volt
a
ge
a
t
pin 7
a
nd pin 8 of CP502
ab
o
u
t
3
.
3
V
a
nd
a
t pin 4 of CP502
ab
o
u
t 5V ?
e connection
02 to DECK ?
Ye
s
Ch
a
nge DVD LOADER.
Check P.CON 6V line of
POWER BLOCK.
Check CP2
3
02
connection to DECK
I
s
the volt
a
ge
a
t pin 8
a
nd
19 of IC2
3
01
ab
o
u
t
DC6V ?
DECK DOE
S
NOT ACCEPT
OPEN/CLO
S
E
www. xiaoyu163. com
QQ 376315150
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TEL 13942296513
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Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
