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TROUBLE SHOOTING
NO PLAYBACK PICTURE OF COMPOSITE VIDEO OUT
Is there VIDEO signal
at pin 103 of IC820.
N
Is there wave form from pin
147 to pin 159 of IC 820?
Y
Check IC820 or
change IC820.
NO DI GI TAL AUDI O OUT ON PLAYBA CK
Is there waveform at
pi n 4 of IC859?
N
Is the volt age at pi n 5
of IC859 about 3. 3V?
Y
Is there waveform at pin
13,1 4, 15 and 16 of IC 871?
N
Is there waveform at pin
13,1 4, 15 and 16 of IC 87 1?
N
Check IC130 and peripher al
circui t.
B
Ch ec k IC800 and peripher al
Y
Chec k CN870and peri pheral
A
N
Check IC130 and peri ph er al
circuit.
Y
Check IC871 and peripheral
circui t.
N
Check IC851 and peripheral
circ ui t.
Y
Pi n 6 of IC859
is LOW?
N
B
Y
Pi n 6 of IC859
is HIGH?
N
B
C
circui t.
Change IC859.
NO PLAYBACK PICTURE OFS-VIDEO OUT
S8400 is S-VIDEO side?
circuit.
Is there VIDEO si gnal at
pin 105 and 106 of IC820?
A
NO PLAYBACK PICURE OF COMPONENT
VIDEO(UK,XE:RGB) OUT
S8400 is COMPONENT
VIDEO side?
(UK,XE:RGB)
Is there VIDEO si gnal at
pi n 102, 105 and 106 of
IC820?
A
NO ANALOG AUDIO OUT ON PLAYBACK
Y
C
Is there AUDIO signal at
pin 7 and 8 of IC871?
Is there waveform at pin
1, 2 and 3 of IC871?
Y
C
Is th er e wa vefo rm at pi n
13,1 4, 15 and 16 of IC871?
Check IC871 or
change IC871.
- 6 -
N
Se lect S-VIDEO side.
Y
Y
Check CN872 and peripheral
circui t.
N
N
Select COMPONENT side .
(UK,XE:RGB)
Y
Y
Check CN870 and peripheral
ci rcui t.
N
Y
Check IC872,Q8720, Q8820 and
peripheral
circ uit.
N
N
Check IC820 and peripher al
Y
N
Check IC800, IC820 and peripher al
circui t.
Y
circ uit.
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