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3. ALIGNMENT PROCEDURES
A dummy resistor of 47 k-ohms must be connected across the tuner output terminals before alignment.
3.1 FM Alignment Procedures (Function switch in the "FM" position)
Flvl RF Alignment
3,3 Multiplex Alignment Procedures (Function switch in the "FM" position/Mode switch in the "STEREO" position)
St€p
Signal So0rc6
Conneclion
Signal
Indicttor
Connoction
s€( rhe oigitll
Roadout Frrquonry
Adrurt
I
R F g e n e r a l o r t o
t e r m i n a l s t h r o u g h
m a t c h i n g n e t w o r k
( 3 0 0 o h m s , b a l a n c e d )
l M a i n t a i n R F l e v 6 l
b e l o w l i m i t . )
87.4 MHz
c h a n n e l o u t p u t
T u n i n g c a p a c i t o r
m i n i m u m c l o s e d .
L106 for maximum
outpui.
2
1 0 8 . 2 M H z
Tuning cepacitor
C 1 1 8 l o r m a x i m u m
outpur,
90 lvlHz
90 lvlHz
L101, L103 for maximum
4
1 0 6 M H z
106 M Hz
A N T . R F . T R I M . C A P .
t o r m a x i m u m o u t p u t ,
5
R e p e a t s t e p s 1 t o 4 .
6
C h e c k o v e r a l l r e s p o n s e c u r v e a n d r e p e a t a b o v e s t e p s a s n e c e s s a r v t o o b t a i n m a x i m u m s e n s i r i v a t y ,
1
N o s i g n a l
" 0 "
c e n t e r m e t e r
o r D C c u r r e n t
m e r e r i n 1 0 0 p A
J2O1 and J2O2
L 2 O 1 p r i m e r y c o r e s o
t h a l t h e m e t e r i n d a c a l e s
its center or may read
" O " . ( R E D c o r e )
8
R F g € n e r a t o r 1 m V { o r
3 0 0 p V , o n l y S t e p 1 0 )
o u t p u l l o F l v l a n t e n n a
t e r m i n a l s t h . o u g h
m a t c h i n g n e t w o r k ,
{ 3 0 0 o h m s , b a l a n c e d )
98 MHz
D i s t o r t i o n m e t e r t o
L o r R c h a n n e l
o u r p u r
9 8 M H z
L201 Secondary core
(BLK) for minimum distor-
1 0
98 lvtHz
9 8 M H z
R 2 1 9 s o t h a t s i g n 6 l s t r e n g t h
L E D m a y l i g h t 5 p o i n t s .
3.2 Muting Circuit Alignment
Stop
Signal Source
Connection
Sign.l
lrdicator
Connection
Set ths Digiral
R€adoul FrGqu€ncy
Adiun
R F g e n e r a t o r 1 2 . 5 p V
o u t p u t t o F M a n t e n n a
t e r m i n a l s t h r o u g h
m a t c h i n g n e t w o r k
( 3 0 O o h r n s , b a l a n c e d l
9 8 M H z
c h a n n e l o u t p u t
98 MHz
F.213 tor 12.5pV
t h r e s h o l d l e v e l . ( D u r i n g
t h i s a d j u s t m e n t t u r n t h e
m u t i n g p u s h s w i t c h
" o N " . )
Stop
Sign.l Source
Connoction
Signal
Indicator
Connoclion
$t rha oigit.l
R@doui Frequency
Adjust
R F g e n e r a t o r t o F l v l
a n t e n n a t e r m r n a l s
t h r o u g h m a t c h i n g
n e t w o r k ( 3 0 0 o h m s ,
b a l a n c e d ) , w i t h 1 m V
Fl!4 stereo simulator
RF level and 1 0096
m o d u l a t i o n { p i l o r 9 % )
F r e q u e n c y c o u n t e r
t o J 3 0 1
9 8 M H z
R304 so that Frequency
counter may preciselY re6d
76 kHz.
2
Stereo, left
( 1 , 0 0 O H z )
V T V M t o r i g h t
R 3 3 1 l o r m a x i m u m
outpul and same separatlon
i n b o t h c h a n n e l s .
S t e r e o , r i g h t
{ 1 , 0 O 0 H z )
c h a n n e l o u t p u t
P i l o t o n l y
output
9 8 M H z
R307 tor minimum
output and same output in
both channels,
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