Sony STR-S5L - Page 24

STR-S5L
FM
Discriminator
Adjustment
Setting:
FM
ANTENNA
O.01
p.F
NULL
Adjustment
Procedure:
l. Tune
the
set
so that
the
noise
levels
become
symmetrical
as
shown
on
the right.
(output
level
of
the
signal
generator:
5
-
l0 dB).
2.
Adjust
the
secondary
side
core
(black)
of T10l
for
the
minimum
reading
on
the
VOM.
3. Adjust
the
primary
side
core
(red)
of
Tl0l for
0V reading
on
the VOM.
4.
If
the
noise
levels
are not
symmetrical
after
adjustment
in
step 3,
repeat
the
steps
I
-
3.
Tune
the
set
so that
the
noise
levels
at the
peak
are
symmetrical,
Distortion
Adjustment
Procedure:
Adjust
the
secondary
side
core
(black)
of
Tt0l
for
the minimum
distortion.
(output
level
of
the
signal
generator:
60dB
(lmV)).
Note:
Repeat
the
secondary-side
and
primary-side
adjust-
ments
several
times.
If
0V reading
can
not
be obtained
on
the
VOM
after
adjustments,
repeat
the
above
steps.
DC
range
l.
fune
the set
to
98 MHz.
2.
Adjust
RT202
for
l9 kHz
t50
Hz on
the
countel..
B)
Simple
Method
Procedure:
l.
Tune
the
set
to the FM
stereo
broadcastins
signal.
2.
Turn
RT202
clockwise
or
counterclockwise
and
memorize
the lighting-up
range
of
stereo
lamp.
3. Secure
RT2O2
at
the
center
of
the
lighting_up
range
of both
turns
as
shown
below.
x_+la-
center
in lighting-up
ranges
11
-..i- \ -t;nnt;nn-"'
\z w
-'J
"'r
-P range
VCO
Adjustment
A) Regular
Method
Procedure:
FM rf
signal
generator
èrrier frequency:
Modulation:
Output
level:
O.Ol
1tF
98 MHz
no
modulation
1 mV
(60
dB)
t--t
*----+-----------rl
vCo
check
f--il--l
I
7m
frequency
counter
NULL
(test
point)
Ttol
(secondary
side:
black)