19
DV-120-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
Is the lose connection
at CP2302 to DECK ?
Check CP2302
connection to DECK.
Change D
V
D LOADER.
Is the voltage at
pin 8 and 19 of IC2301
about DC6
V
?
