Advertisement
ADJUSTMENT
OF AMPLIFIER
UNIT
* Adjust as follows after cleaning the head and adjusting its
azimuth properly.
*Set the input switch at the LINE side.
TEST
OSCILLATOR
{OSCILLATOR
& ATTEMUATOR)
OSCILLOSCOPE
(1)
(2)
(3)
LINE
IN
LINE
OUT
Adjustment of playback output
DOLBY NR switch:
OFF
Tape selector:
NORMAL
Test tape:
MTT-150 (Dolby tape)
Play back test tape, and turn SVR701 (L-ch), SVR801
(R-ch) until the playback output becomes 0.55 V.
Adjustment of level meter
DOLBY NR switch:
OFF
Tape selector:
NORMAL
Test tape:
MTT-150 (Dolby tape)
Play back test tape, and turn SVR703 (L-ch), SVR803
(R-ch) until the +3 dB LED on level meter begins to
light up.
Adjustment of record, playback output
DOLBY NR switch:
OFF
Tape selector:
METAL
Input signal:
—20 dB, 1 kHz
Tape:
Metal tape (AC-711 or the like)
. Feed input signal to record input terminal, and pause
the set in record mode.
monitor output becomes 0.4 V.
. Record this input signal.
. Press the rewind
button
the rewind the tape to the
record starting position.
. Press the play button.
. Make sure the playback output is 0.4 V.
. If other than 0.4 V, turn SVR702
(L-ch), SVR802
(R-ch) to adjust.
. Repeat steps 3. to 7. to adjust the playback output to
0.4 V precisely.
PARTS LOCATION
SVR803
SVR 703
) METER GAIN
S
a
SVR701
Svnaot) PLAY GAIN
SVR601(METAL)
SVR602(METAL)
rt
) BIAS
Syn 702 Rec GAIN
SVR802
1. Set the input level adjusting knob
in the position
determined in adjustment (3) above.
2. Attenuate the input signal from —20 dB in (3) by
further 20 dB to a final —40 dB.
4. Press the rewind
button to rewind the tape to the
record starting position.
5. Press the play button.
6. Regarding the playback output of 1 kHz signal as 0
dB, make sure the value of 10 kHz signal is within a
range of +1 dB.
7. If out of this range, turn SVR6O1
(L-ch), SVR602
(R-ch) to adjust.
8. Repeat steps 3. to 7.
Advertisement
