Pioneer sx-450 - Manual (Page 9)

9.2
1
.
2
.
3.
4.
FM SECTION
Through 300 ohm dummy antenna, connect
FM signal generator to the 300 ohm FM
antenna terminals and set for 400Hz at lOOdB
and 100% modulation.
Connect AC voltmeter and distortion meter to
TAPE REC jack (L or R).
Set FUNCTION switch to FM and MUTING
switch to OFF.
Set FM signal generator and SX-450 dial
indication to point A (90MHz).
Adjust T3 for maximum indication on AC
voltmeter.
Adjust T5 lower core for center of scale
indication on AM/FM meter.
7. Set FM signal generator for 9dB output and
adjust T1 and T2 for maximum indication on
AC voltmeter.
8. Set FM signal generator and SX-450 dial
indication to point C (106MHz).
5.
6
.
9. Adjust TC3, then TCI and TC2 for maximum
indication on AC voltmeter.
10. Again set FM signal generator and SX-450 dial
indication to point A.
11. Adjust T3, then T1 and T2 for maximum
indication on AC voltmeter.
12. Repeat steps 8-11 to eliminate variations in
sensitivity at points A and C.
13. Adjust T4 for maximum sensitivity.
14. Detune to noise only and adjust T5 lower core
for center of scale indication on FM meter.
15. Set SX-450 dial indication to point B (98MHz)
and adjust FM signal generator for center of
scale indication on AM/FM meter.
16. Set FM signal generator output to 60dB and
adjust T5 upper core for minimum distortion.
17. Repeat steps 14-16 eliminate variation in mini­
mum distortion position.
AC voltmeter Distortion meter
r
FM signal generator
r
I
T4 T3
T2
T1
TCI
r
2B