21
DV-310-S
5
6
7
8
5
6
7
8
A
B
C
D
E
F
5. DIAGNOSIS
5.1 TROUBLE SHOOTING
PO
W
ER 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, IC4001 and
peripheral circuit.
Yes
W
rite D
V
D FIRM
W
ARE DATA.
Check AT+3.3
V
line of PO
W
ER 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
PO
W
ER BLOCK.
Yes
Is the lose connection
at CD2302 to DECK ?
Check CD2302
connection to DECK.
Change D
V
D LOADER.
Is the voltage at
pin
8
and 19 of IC2301
about DC6
V
?
