Sony TC-366 - Page 34

12-22. Noise Suppress Check
Connection:
As shown in Fig. 12-31.
Switch Setting:
MONITOR switch ..............c008. SOURCE
NOISE SUPPRESS switch .......... OFF
Procedures:
(1) Deliver a 9 kHz signal of -10 dB (0.24V) and
adjust the AUX VOLUME to obtain 0dB
(0.775V) on the VTVM.
(2) Be sure that the VI'VM reading is -5.5~
-1.5dB (0.41~0.65V) when the NOISE
SUPPRESS switch is changed to ON.
AF
OSC REC Amp.
AUX
9 kHz, -10dB
LINE OUT
Fig. 12-31 Noise suppress check setup
12-23. Interference Check between
MIC & AUX VOLUMES
Connection:
As shown in Fig. 12-32.
Switch Setting:
MONITOR switch ......ceeeeceeeeeeees SOURCE
Procedures:
A) Interference with MIC VOLUME when using
AUX INput jack
(1) Set the AUX VOLUME tto the position
indicated on page 25.
(2) Deliver a 1 kHz signal of -10dB (0.24V)
into the AUX INput jack.
(3) Be sure that the level variation is within
1 4B on the VTVM when the MIC VOLUME
is changed from the minimum to the maxi-
mum position.
B) Interference with AUX VOLUME when using
MIC jack
(1) Set the MIC VOLUME tto the position
indicated on page 25.
(2) Deliver a 1 kHz signal of -60 dB (0.775 mV)
into the MIC jack.
(3) Be sure that the level variation is within
2dB on the VTVM when the AUX VOLUME
is changed from minimum to maximum
position.
AF
oSC REC Amp.
eS co
P.B. Amp.
AUX -10dB
Mic. -60dB 1kHz x
Oo
LINE OUT
Fig. 12-32 Interference check setup
between MIC & AUX VOLUMES
12-24. Minimum Input Level Check
Connection:
As shown in Fig. 12-33.
Switch Setting:
MONITOR switch ........ cee ecco SOURCE
Procedures:
A) Level Check of MIC jack
(1) Set the AUX VOLUME to minimum and
the MIC VOLUME to maximum position.
(2) Deliver a 1 kHz signal into the MIC jack
and adjust the level of the audio oscillator
to obtain OdB (0.775V) on the VTVM.
(3) Be sure that the signal level on the audio
oscillator is less than -72dB (0.2mV).
B) Level Check of AUX INput jack
(1) Set the MIC VOLUME to minimum and
the AUX VOLUME to maximum position.
(2) Deliver a 1 kHz signal into the AUX INput
jack and adjust the level of the audio
oscillator to obtain O0dB (0.775V) on the
VTVM.
(3)
Be
sure
that
the
signal
level
on
the
audio
oscillator
is
less
than
-22dB
(61.5
mV).
REC Amp.
AF
ose
AUX, MIC
1kHz
LINE OUT
OdB
Fig.
12-33
Minimum
input
level
check
setup
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