Advertisement
ELECTRICAL
ADJUSTMENTS
(Continued)
9. While the 10 kHz test tape is being played back again, check
to see
that
the
phase
difference
of the Right and
Left
channels is #90° on the synchroscope.
A. While the test tape is playing, turn the azimuth adjusting
screw
until
the
waveforms
of the
Right
and
Left
channels are superimposed.
Adjustment
y~
Combination Head
B.
If not, replace the Pinch Roller of the take-up side wit
AMPLIFIER GAIN ADJUSTMENT
h
the other one and perform the adjustment from Item 6.
10.
After the adjustment,
secure
the azimuth
adjusting screw
with paint or glue.
AT
LEFT CHANNEL
Connect an audio signal generator and an attenuator to the
jeft channel
LINE
IN, a VTVM
to the test point (TP101),
and a VTVM
to the left channel LINE OUT as illustrated.
Audio Signal
Generator
TINE IN
RECORD
Attenuator
200mvV (—14 dB)
VTVM
(580 mV)
Dummy
Load
Set the Monitor
Switch
to SOURCE
and feed the 1 kHz
signal from the audio signal generator at 200 mV (—14 dB)
to the unit.
Adjust
the left channel
INPUT
Level
Control
until the
output level on the test point (TP101) becomes 580 mV on
the VTVM.
Advertisement
