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5.7
POSITIONING THE MOTOR PULLEY
Check to ensure that a clearance between the DC motor
and pulley is 3.1 mm.
If out of specification, reposition
the pulley as shown.
5.8
ADJUSTING THE TAPE SPEED
Play the 3 kHz test tape back, and check to make sure
that the meter pointer of a measuring instrument (fre-
quency counter) indicates 3000 Hz +2.5% or less as spec-
ified. If it is out of the range, adjust the semifixed re-
sistor inside the motor.
After adjustment,
be sure to
stick seal on the hole for the resistor.
CRS-2204
6. ELECTRICAL ADJUSTMENTS
AND MEASUREMENTS
Precaution for Adjustment and Measurement
1. Whenever adjusting or measuring any circuit, wipe the
heads clean with a soft cloth moistened with alcohol
or carbon tetrachloride. Also be sure to demagnetize
the heads, capstan, and similar parts.
2. The voltage at any electrical point may vary with the
input signal, so make measurements of voltage under
no signal condition.
3. Transistors
are affected
by microvoltage.
Whenever
measuring on them, use
aVTVM having a high internal
resistance and high input sensitivity enough to elimi-
nate errors in measurement.
4. In adjustment or measurement, set the TONE control
to its mechanical center (''0'') unless otherwise spec-
ified.
6.1
ADJUSTING THE PLAYBACK LEVEL
ALC BALANCE
REIS (RCH)
PLAY BACK OUTPUT
BALANCE ADJ.
HAS CURRENT.
BIAS FREQUENCY
TS01
BIAS FREQUENCY
R270
@
ADs,
SEPARATION
(48 5KHz)
ADJ
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