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B. Playback picture is not good.
Noise appears on the screen on the whole. YES
NO
Noise appears on the screen at the bottom
NO
Check flow A.
YES
Commect the pin 117 of IC601 to GND for a few of seconds.
Are SW-pulse and HA-SW applied to preamp circuit? YES
NO
Is sw pulse supplied from pin 9 of IC601?
NO
Check D. PG input and connector.
YES
Check pattern
Is Enve. waveform supplied to pin $ of PT01? YES
NO
Check connector, Head Amp and Head dust.
NO Changed Head.
Check video circuit.
27
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