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<S — RT515 C/J
|
i Cassette mechanism sections
Adjustment and Confirmation methods
Adjust
1. Adjust the | Test tape:
1. Connect the measuring instrument to the
Head
VT738(8kHz)
line output or speaker output.
azimuth
2. While playing the VT738
(8kHz section),
adjust the set so that its output becomes
maximum and the phase difference
becomes minimum in the respective FWD
and REV direction (In case the screw
driver shaft is too small at the time of
adjustment from a hole adjacent to the
sub-motor of the set, the shaft will come
difficult to perform adjustment.
3. By performing fine adjustment, confirm
that the output is at a peak point.
. Confirm
1.Check to see if the reading of the F.
Built-in volume
Test tape:VT712
the Tape
(3kKHz)
counter/wow & flutter meter is within
resistor
speed
3015~3045 (FWD/REV), and less than
and wow
0.35% (JIS RMS) .
flutter:less
than0.35%
2. In case of out of specefication, adjust the
motor with a built-in volume resistor.
& flutter
. Confirm
Test tape:VT724
. Play test tape VT724, and set the volume
| Speaker
the
(1kHz)
position at 2 V
out 1k
Playback
VT738
2. Play test tape
V7T738
and confirm 1k
/12.5Hz
frequency | (125Hz/1kHz/8kHz)
/12.5kHz: O + 3dB,
:0 + 3dB
response | Test Point
1k /63Hz: O + 3dB.
1k
: Speaker out
3. When 8 kHz is out of specification, it will
/12.5kHz
be nesessary to read adjust the azimuth
:0 + 3dB
. Confirm
Test tape :VT721
. Confirm the rear and front output be
Output
the
(1kHz)
more than 8.3V((17W). (4-speaker
level:more
Maximum | volume:maximum
connected.)
than
output
BASS/TRE:center
2. Confirm that consumption current at above | 17W(8.3V)
power
condition to be less than 5A.
Consumptio
current
'less than
5A
4, Sound leakage should not occur at volume
minimum.
. Oscillation should not occur at BASS/TRE
Line out
level
700~1400m
1.Comfirm the line out level to be within
700~1400mV
Test tape:VT721
(1kHz)
Test point : line out
. Confirm
Maximum
output
Power
The tuner section is of an adjustment-free design. In case the tuner Is in trouble, replace the tuner pack.
36 (No. 49282)
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