Sanyo M7770K - Tape Speed Adjustment; Head Azimuth Adjustment

ADJUSTMENTS (Continued)
TAPE SPEED ADJUSTMENT
1. Remove the cassette compartment lid and connect a
frequency counter to the left or right channel LINE OUT as
illustrated. Then, play back a 3kHz test tape (Example:
TEAC MTT-111).
Frequency Counter
3000 Hz (+3 %)
Dummy Load
47k ohm
LINE OUT
2. Adjust the tape speed by turning the potentiometer inside
the Motor with an alignment tool until the frequency
counter reads 3kHz (+10Hz).
Tape Speed Adjustment
HEAD AZIMUTH ADJUSTMENT
1. Remove the cassette compartment lid and connect a VIVM
and a dualtrace synchroscope to both channels LINE OUT
as illustrated. Set the synchroscope as follows:
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Azimuth Adjusting Screw
Synchroscope
Dummy Load
47k ohm
LINE OUT
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Oy
Dummy Load
47k ohm
Insert a 8kHz test tape (Example: TEAC MTT-113C) into
the cassette compartment and play it back.
_ Slowly turn the azimuth adjusting screw until the amplitudes
of both channel signal wave forms are at maximum and both
wave forms overlap. Set to optimum at maximum reading of
the VIVM.
Adjustment
R/P Head
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4.
After
the
adjustment,
secure
the
azimuth
adjusting
screw
with paint or glue.