
49
DV-NC70/W
DV-NC70X/RU
No NICAM/IGR.
FLOW CHART NO.28: NICAM/IGR TROUBLESHOOTING (For Hi-Fi model)
YES
Is there a base band signal at SIF
OUT of TU101 (pin (22))?
YES
YES
Is there a base band signal at pin(2)
of IC1701?
NO
Check peripheral circuit of TU101.
NO
Check between pin(3) of SC1702 and
pin(2) of IC1701.
NO
NO
Is there a NICAM /IGR audio signal
at pins (31), (30) of IC1701?
YES
Is there a NICAM /IGR audio signal
at pins (7), (11) of SC1701?
See <Flow Chart No. 23: Hi-Fi SOUND
MODE TROUBLESHOOTING (1)> for
Hi-Fi model.
Check PC 5V line.
NO
NO
YES
YES
Is there 5V supplied at pins (11), (19),
(1) of IC1701?
YES
Check serial data and clock at pins
(12) and (13) of IC1701.
Check between IIC Data pins (26), (27)
of IC701 and pins (12), (13) of IC1701.
YES
Is there oscillated 18.432MHz at pins
(5), (6) of IC1701.
Is there 8V supplied at pin(33) of
IC1701?
YES
NO
Check peripheral circuit of IC1701.
Replace IC1701.
Check peripheral circuit of X1701.
Is there 9V outputted from emitter of
Q1918?
NO
Check PC 12V line.
Содержание DV-NC70
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