Zenith DVR313 Series, Руководство по обслуживанию

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3-4
5. No Tuner Sound
YES
Is the IC715,IC717-3 :
in Tuner Mode high?
Audio
signal appears even in the
outside input 1
Check
IC2072 -16,17 signal flow.
Check IC701 power and:
ambient circuits Check X704
vibration.
Check <No audio appears in
the outside input 1 mode>.
Check IC2084-11,38 signal
flow
NO
NO
NO
NO
YES
YES
No audio signal output
in the IC 701 -30,31
YES
Check C709,TUNER signal
flow
NO
Check IC701 -2
: SIF signal input
YES
Check IC704 power and
ambient circuits.
NO
Is the
IC704 -69 high after reset signal
in change of channel?
YES
Check IC706 power and
ambient circuits.
NO
No Sync signal input:
in the IC704 -39.
YES
Check Q724 (V. Buffer TR)
circuit.
TUNER power and ambient
circuit.
NO
No TUNER VIDEO
signal input.
YES
Check IC2072 -16,17 signal
flow