Page of 56
<Output Test>
External
TesttfOS
-
Press CENTER] and leasure the signal
level of the
output indicated
on the LCD.
Check that
the signal level of each output
is
within
the
allowed range and that
It
foras
a
sine wave.
Here,
confirw
that
the
output wavefora
is
not
distorted
and that the
frequency
is
correct
(see
Fig.
2).
Also,
confira
that the
wavefora changes saoothly when
the
aaster
VR
on the panel
is
turned, and that the level of the
waveform goes
to 0
when the master YR
is
turned
to NIH.
Measure
the
output levels
in
the order shown
below
and
confirm
if
each
level
is
within the range
of
regulation
as on
the table
1.
OUTPUT L/MONO
OUTPUT
R
PHONE
L
PHONE
R
After checking
the signal level for
PHONE
R,
press CENTER]
and
proceed
to
the next test.
Table
1
Residual noise, and specified ranges
of
output signal levels
Residual noise
Output signal
level
Frequency
Out-L
-87.0[dBu] aax
15.0-'18.0CdBu]
488 Hz
Out-R
-87.0[dBu] aax
15.0'-18.0CdBu]
412
Hz
Ph-L
-87.0[dBu] aax
7.0^9.0CdBu]
/
33
0
548
Hz
Ph-R
-87.0[dBu] aax
7.0-9.0CdBu]
/
330
610
Hz
22

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