
F. PLAYBACK PHASE ADJUSTMENT (See Fig. 5-6)
TEST POINTS | S/W PULSE TEST PIN | PATH ADJ. FIXTURE | |
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VIDEO OUT | MAIN CIRCUIT BOARD | ||
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MEASURING EQUIPMENT | OSCILLOSCOPE |
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ADJUSTMENT | VR595 (PG SHIFTER) | MAIN CIRCUIT BOARD | |
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Phase generator (PG) shifter decides the VIDEO HEAD switching point when a TAPE is played back.
In case the Phase generator (PG) shifter isn't correctly tuned, HEAD switching noise or vertical jitter may occur.
a. Connect the PATH ADJ. FIXTURE to PT01 of the MAIN CIRCUIT BOARD.
b. Play the ALIGNMENT TAPE (COLOR BAR SIGNAL OR MONOSCOPE SIGNAL)
c. Connect the
f. Adjust the PG volume for time interval of 6.5H±0.5H between switching pulse and
Fig. 5-6 PLAYBACK PHASE ADJUSTMENT
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