Realistic STA-720 - Page 9

MPX ALIGNMENT
FM ANTENNA
TERMINAL
(300
a)
MAIN AMPLIFIER
ALIGNMENT
TAPE
OUT
Pin
#46
TUNER
FRONT END
L101,
L102
,
Ll04
T201
,
TC1 01
TC102.
TC103
FM SIGNAL
GENE
RATOR
FM DUMMY
ANTENNA
300 C,
FM
IF
VR201
vR202
MPX
VR3O1
VR3O2
STE
BEO
MODULATOR
Fis.3
FM RF, lF AND
MPX
ALIGNMENT CONNECTION
Set
SELECTOR Switch to
FM.
Tune for 98
MHz
on
band.
Signal
Generator
output
level:
1000pV
Deviation: 75 kHz at
100%
modulation
of
composite
signal
Connect Sigpal Generator to
FM Antenna Terminal
through
FM
Dummy Antenna
(300
S)).
STEP
19 kHz
(PILOT
SIGNAL)
MODULATION
Level
SIGNAL
GENERATOR
Freq.
Set to
OUTPUT
INDICATOR
Connected to
ADJUST
Refer
Fig.
4
ADJUST
FOR
NOTE
Frequency
counter
connected to
Pin
#46
and
Ground
VR301 19 kHz
2 8o/"
Composite 1 kHz
R
channel
AC Voltmeter
connected to
TAPE
OUT
jack
of
R
channel
Adjust
input
for Audio
out-
put
of about
0.7
v.
3
8o/o
Composite 1 kHz
L
channel
AC
Voltmeter
connected to
TAPE
OUT
jack
of
R
channel
VR3O2
minimum
AC Voltmeter
reading
should
be at least
32
dB below read-
ing
in step 2.
4 8o/o
Composite i kHz
R
channel
AC Voltmeter
connected to
TAPE
OUT
jack
of L channel
VR302
mrntmum same
as
Step 3
lf
you
did
not
obtain
-32
dB readings
in steps 3 and 4
(compared
with step 2),
readjust
VR302
until
you
obtain
-32
dB
reading
for both steps
3
and
4.
INDICATOR
ADJUSTMENT
REMARKS
DC Voltmeter
V R601a,b
Adjust for 0.005
-
0.015 volts
across
R619 a, b with
no signal.