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Procedure
1.
With
the
equipment
connected
as shown
in
Fig. 3-4, feed
a 1kHz
to the TUNER
input
jack.
Adjust the attenuator to obtain a 1 volt
reading on the ac VIVM.
2.
Turn the semifixed resistor R701
(R801), see
Fig. 3-3,
mounted
on
the
Meter
Amplifier/
Headphone
Amplifier
board
to
obtaifi
a 0
reading on the level meter.
3.
Decrease
the input signal level 10 dB (20dB),
and
then
set the METER
LEVEL
switch
to
-10dB
(-20dB) position.
4.
Confirm
that the reading on
the level meter
is 0 + 0.5 VU.
5.
Confirm that the reading of the meter changes
with variations in attenuator settings.
3-6.
RATED OUTPUT
MEASUREMENT
Preparation
1.
Set the FUNCTION-2
switch to TUNER.
2.
Set the BALANCE
control fully countérclock-
wise
(left-channel
calibration)
or fully clock-
wise (right-channel calibration).
3.
Set the OUTPUT
LEVEL
switch to 1V.
4.
Set the HEADPHONE
LEVEL control to maxi-
mum level position.
Procedure
1.
With
the
equipment
connected
as shown
in
Fig. 3-4, feed
a
1kHz
to the TUNER
input
jack.
Adjust the attenuator to obtain a 1 volt
reading on the ac VIVM.
2.
Each output level should be within the limits
given in Table 3-2.
TABLE
3-2.
OUTPUT
LEVEL
Outputs
Output Level
CENTER
OUTPUT
16.0 +1dB
HEADPHONE
OUT (open)
16.0 +1 dB
REC OUT
REC/PB OUT
-32 +3dB
1 or 4 to ground
see Fig. 3-S.
3-7.
HARMONIC-DISTORTION
MEASUREMENT
Preparation
Same as described in Procedure 3-3, except the
TONE
switch should be set to ON.
Procedure
1.
With
the
equipment
connected
as shown
in
Fig. 3-4, feed in the signal specified in Table
3-3 and then adjust the VOLUME
control to
obtain a 1 volt (r.m.s.) output.
2.
Measure
the harmonic
distortion.
The
har-
monic
distortion
should
be within
the limits
given in Table 3-3.
TABLE
3-3.
HARMONIC DISTORTION
Input Signal
Harmonic
Level and Freq.
Distortion
PHONO-1
(HIGH
-18dB,
1 kHz | 0.05% or less
LEVEL) or PHONO-2
-8dB,
1 kHz | 0.1% or less
(at 3 vols output)
*MIC
3 dB, 1 kHz | 0.7% or less
(at 3 vols output)
z
+
TUNER, AUX-1, 2, 3
en soo a8;
0.03% or less
*Note:
In this measurement,
adjust the output
level
by
means
of the
MIC
LEVEL
control.
Preparation
Same as Procedure
3-4.
Procedure
— Perform this for each input.
Pp
L-CH
;
:
REC
i
@
OUT
Fig. 3-5.
REC/PB (DIN) connector
—18—
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