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SECTION 2
ADJUSTMENTS
e Refer
to Adjustment
Location
on page
6.
Note:
As
a front-end
(FE101,
421
etc.) is difficult
to
repair if faulty, replace
it with
new
one.
FM SECTION
e Standard
Setting of FM
Stereo
RF
Signal Generator.
STEREO
STANDARD
SIGNAL
Carrier frequency : Q8MHz
Modulation:
Audio
1kHz, 40kHz
deviation
Subchannel
38kHz,
AQkHz
deviation
Pilot 19kHz,
7.5kHz
deviation
FM Discriminator Adjustment
(NULL and MONO Distortion)
.
distortion
FM FF signal
raster
generator
ANTENNA
FM (75 Q)
OUTPUT
output
level: 1OmV
(80dB uy)
VOM
(DC range)
TP251
(NULL)
[|
+
L-
Procedure:
1. Tune
the set to 98MHz.
2. Adjust
T252
for OV reading
on
the VOM.
MONAURAL
STANDARD
SIGNAL
98MHz
1kHz, 40kHz
deviation
FM Muting Level Adjustment
FM RF signal
generator
ANTENNA
FM (75 Q)
mode : mono
output level : 32 uV (30dB p)
OUTPUT
Procedure:
1
2.
3. Adjust
T2538
for a minimum
reading
on
the distortion
eee
ee ae
eae
MONO
Distortion
4, Repeat
the adjustments
of 2 and 3 several times.
Note:
When
replacing
the
ceramic
filter, perform
this
alignment.
Tune
the set to 98MHz.
Push the STEREO/MUTE
switch and put on the light
the
"MUTE"
indicator in the fluorescent
display.
. Set SSG
output
level to 32 uV (380dBy).
4, Adjust RV251
so that
"STEREO",
"TUNED"
light.
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