Diagnosis; Troubleshooting - Pioneer DV-420V-K Service Manual

5

5. DIAGNOSIS

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5.1 TROUBLESHOOTING

POWER DOES NOT TURN ON
Is the voltage at
pin 7 and pin 8 of CP502 about 3.3 V
and at pin 4 of CP502
Is there waveform at
X4001 about 3.0V p-p ?
Write DVD FIRMWARE DATA
TE
L 13942296513
DECK DOES NOT ACCEPT
OPEN/CLOSE
Is the voltage at pin 8 and
19 of IC2301 about
Is the lose connection
at CP2302 to DECK ?
Change DVD LOADER.
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5
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No
about 5V ?
Yes
No
Yes
No
DC6V ?
Yes
Yes
No
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8
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3 6 7 1 3
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DV-420V-K
6
7
2 9 9 4 2 8
Check AT+3.3V line of POWER
and peripheral circuit.
Check X4001, IC4002 and
peripheral circuit.
1 5 0 5 8 2 9 9 4
Check P.CON 6V line of
POWER BLOCK.
Check CP2302
connection to DECK
m
co
7
8
9 9
A
B
C
2 8 9 9
D
E
F
29
8