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!4
TUNERADJUSTMENTS
AM Equipment
Connection
AM IF (45S KHz)
&k
Sweep generator
SG
Wave
tom
a
(455 KHz)
FM Eqw@ment
Connection
FM IF $'ICL7MHZ)
Fig.
2
&G@
Trac+ang(AM Ban@
m~ma LooP
ANT
Unfl
Resstor
or SP
\
J
FM S-
~rwatof
Unh
Wave Form
V.T,V.M.
)
FM MPX(Multiplex)
ADJUSTMEfW
FM
MPX
circuit uses PLL IC, thus adjustments are very easy.
. Connect test instruments as shown in Fig.3.
Set signal generator frequency to 98 MHz.
Set stereo signal generator to 90% main signal and 10% pilot signal.
I
I
1,
'""
TL.1
I
I
Fig. 3
Unit
Resistor
or SP
!f-
(300
VCO ADJUSTMENT
Connect
frequency
counter
between as following connection,ajustVR101
for a reading of 76kHz on the counter as shown in Fig. 4.
F
l-----+.
'-J
la
FORVCOADJ.ONLY
,--------------------
~
;15
X'+
-r
!
ba
"i
&;
'°K$l
~
--------------------
,
Fig. 4
FrequencyComler
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