Sansui 2000X - Page 12

ALIGNMENT
FM ALIGNMENT PROCEDURE
NOTE: To align, set the signal generator level to minimum.
Turn tuning gang fully.
Center carrier wave.
Set pointer at reference mark.
DIAL ADJUST
STEP ALIGN. GENERATOR FEED SIGNAL | CONNECT SETTING ADJUST FOR
1. IF 10.7 MHz Sweep signal to | Oscilloscope to Top and bottom | Best IF.
Trans- +200 kHz TPio: via the TPeot, 202 and 2o3 sides of T21, 202, | wave form
former 10pF ceramic via the 10pF 208
capacitor ceramic
capacitor with
probe
“2. Discrimi- 10.7 MHz Sweep signal to | Oscilloscope to FM. S curve
nator +200 kHz TPio1 via the 2 Discriminator
10pF ceramic transformer
capacitor Toos top and
bottom sides
3. 0.S.C 90 MHz To antenna Oscilloscope 90 MHz O.S.C. coil Maximum
400 Hz 100% terminals and V.T.V.M. Lios
Modulation to output load
4. 0.8.C 106 MHz To antenna Oscilloscope 106 MHz O.S.C. trimmer | Maximum
400 Hz 100% terminals and V.T.V.M. TCyos
Modulation to output load
5. Reiterate 3
and 4.
6. High- 90 MHz To antenna Oscilloscope 90 MHz Antenna coil Maximum
frequency | 400Hz 100% terminals and V.T.V.M. Lio1, Liog and
Amp. Modulation to output load 108
Circuit
Te High- 106 MHz To antenna Oscilloscope 106 MHz Trimmer TCyo;, | Maximum
frequency | 400Hz 100% terminals and V.T.V.M. TCiog and TCio4
Amp. Modulation to output load
Circuit
8. Reiterate 6
and 7.
FM IF WAVE FORM
FM DISCRIMINATOR WAVE FORM
~200
KHz = KHz
-100 10.7 +100 +200
MHz. KHz KHz
—— |
+
—200 100
KHz KHz 497)
MHz
=
+100 +200
KHz
KHz