Sony TA-2000F - Tone Control Check

TABLE 3-4. FREQUENCY RESPONSE
_
*Specified Frequency
Response
TUNER
(47k ohm)
PHONO-1
(HIGH
LEVEL)
13.1
£0.5
dB
PHONO-1
(LOW
LEVEL)
-40
dB
or
less
(47k) at 100 Hz (30 ohm)
or
PHONO-2
-57
dB
or
less
(LOW LEVEL)
(30 ohm)
MIC
(MIC LEVEL control:
maximum)
+2 dB at 10Hz
+8 dB at 100 kHz
-13.7 £0.5 dB
at 10kHz
+9 dB at 30Hz
+9 dB at 30kHz
TUNER
* referred to 1 kHz 1 volt output
CENTER OUTPUT
+9 dB at 20Hz
+8 aB at 20kHz
TABLE 3-5.
PHONO-1 (HIGH LEVEL)
“'TA-2000F
NOISE LEVEL SPECIFICATIONS
Inputs Noise Level
-70 dB or less
-57 dB or less
-35 dB or Jess
Note: The difference between left and right
channel noise levels should be 4 dB or
less. The average noise levels are given
in Table 3-5.
3-10. TONE CONTROL CHECK
Preparation
1. Set all controls as described in Procedure 3-3,
3-9.
NOISE
LEVEL
MEASUREMENT
except
set
the
TONE
switch
to
ON.
Preparation
2.
Set
the
FUNCTION-2
switch
to
TUNER.
1.
Same
as
described
in
Procedure
3-3
except
set
Procedure
the
FILTER
switch
to
LOW
and
the
TONE
\
With the equipment connected as shown in
switch
to
ON.
ok
Fig. 3-4, feed a 1kHz signal to the TUNER
input jack. Vary the attenuator to obtain a
1 volt reading on the ac VTVM.
2,
Turn
the
VOLUME
control
fully
clockwise.
Procedure
2.
Check
the
frequency
response
by
varying
the
BASS, TREBLE controls and the input signal
frequency while keeping the oscillator’s output
constant. TONE control response should be
as given in Table 3-6.
1.
With
the
equipment
connected
as
shown
in
Fig.
3-6,
measure
the
output
noise
level
at
each
FUNCTION
switch
position,
with
the
corre-
sponding
input
terminals
shorted.
ac VTVM
a
oscilloscope
aera |
F TA-2000F
shorting plug
| ™
Fig.
3-6.
Noise
level
check
test
setup