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9
ELECTRICAL ADJUSTMENT
(3) SYNC TIP FREQUENCY
v
CONNECTION METHOD
v
ADJUSTMENT PROCEDURE
1) Set the VCR to STOP mode without Video Signal.(VIDEO IN JACK is shorted with Ground)
2) Connect the frequency counter TJ391.
3) After Inserting Rec Tape REC in SP Mode
4) Adjust R391 to obtain 4.20
±
0.1 MHz.
Adjustment Parts Check Point Measuring Equipment Test Tape Input Signal
R391 TJ391 Frequency Counter - -
SYNC TIP
R391
CH-1
Oscilloscope
CH-2
TJ391
VIDEO IN is shorted with Ground