Realistic STA-720 - Alignment Procedures

ALIGNMENT
PROCEDURES
Do not
attempt
alignment unless
the
following
equipment is available.
1.
AM
Signal
Generator
2. Oscilloscope
3.
AC Voltmeter
4.
FM
Signal Generator
5.
Stereo Modulator
6.
Audio
Generator
7. Distortion meter
8.
DC Voltmeter
9.
Frequency
Counter
when aligning.
Note: Remove
line cord antenna from
FM
external
antenna
terminal
AM IF
&
RFALIGNMENT
Note:
Remove line
cord antenna from
FM
external antenna terminal when aligning.
RECEIVER
Loop
Antenna
Fis. 1
AM ALIGNMENT
CONNECTION
TAPE
OUT
Output of
signal
generator
should be no higher
than
necessary
to obtain an output
reading.
Signal
Generator
Modulation:
30%
Set SELECTOR
switch to
AM.
STEP
SIGNAL
GENERATOR
COUPLING
SIGNAL
GENERATOR
FR EOUENCY
RECEIVER
DIAL
SETTING
INDICATOR
ADJUSTMENT
Refer Fig.
4.
REMARKS
1 Refer Fig. 1
455 kHz
(400
Hz Mod.)
Point
of non-
interference
(on/about
600 kHz)
AC Voltmeter
to
TAPE
OUT
jack
1401
ilFT)
Adjust
for maxi-
mum
reading.
2 Same
as
Step 1
600 kHz
(400
Hz Mod.)
600
kHz Same
as
Step 1
L401
(OSC
Coil)
L451
(ANT
Coil)
Same
as
Step 1
3 Same
as
Step 1
1400 kHz
(400
Hz Mod.)
1400 kHz Same
as
Step
1
TC402
(OSC
Trimmer)
TC4O1
(ANT
Trimmer)
Same
as Step 1
TUNER
FRONT
END
TC401,TC402
L401