Pioneer TX-530L Service Manual page 15

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E
12. ADJUSTMENTS
FM Tuner Section
o Check that the dial pointer indicates a starting point.
o Connect the SIGNAL meter between terminal no. 5 of tuner ass'y and the ground.
. connect the TUNING meter between terminals no. 1 and no. 2 of tuner ass'y.
o Set the FM switch to ON and the FM MUTING switch to OFF.
N O T E :
Connect the MPX SG to the FM SG external modulator terminal and set the mod,ulation to Main (lkHz, L+R) !67.5kH2
deuiation, Pilot (19kHz) t7.shHz deuiation.
AM Tuner Section
o Check that the dial pointer indicates a starting point.
o Turn ON the MW switch.
o Connect the SIGNAL meter between the terminal no. 5 of tuner ass'y and the ground.
Step
F M S G
(40OHz, t75kHz deviationl Position of
dial pointer
Adiustmont
poant
Adjustmont procedure
Frequency
Levol
1 0 6 M H z
1 06dB
1 0 6 M H z TC3
S p t t h p T l l l \ l l N G
9 O M H z
'| 06dB
9 0 M H z
vc3
( F i g . 1 2 - 1 )
m e t e r t o t h e m a x i m u m v a l u e .
3
R e p e a t s t e p s 1 t o 2 .
4
9 8 M H z 1 8 d B
9 8 M H z
T C I
T C 2 , T 1
S e t t h e S I G N A L m e t e r t o t h e m a x i m u m v a l u e .
5
N o s i g n a l
W h i t e n o i s e
T2
s e t t h e T U N I N G m e t e r t o t h e c e n t e r p o s i t i o n .
b
T u r n O N t h e F M M U T I N G s w i t c h .
7
9 8 M H z
25.'35dB
Variable
9 8 M H z
R 1 0 4
R e m o v e R 1 O 4 w h e n m u t i n g o p e r a t i o n s t o p s a b o v e 3 0 d 8 .
8
e8MHz I
ruot
N o t m o d u l a t e d
9 8 M H z V R 1
S e t t h e s i g n a l o f t h e t e r m i n a l n o . 1 0 t o 1 9 k H z ( r 1 0 0 H z )
9
98MHz I
euot
S t e r e o m o d u l a t i o n
9 8 M H z
T 1
(within
tg0" )
M i n i m i z e t h e d i s t o r t i o n o f t h e O U T P U T t e r m i n a l s i g n a l .
Step
AM SG
(4OOHz, 30% modulation)
Posataon of
dial pointer
Adiustment
point
Adjustment procedure
Frequency
Level
1 1 4 0 0 k H z
100d8
1 4 0 0 k H z
TC5
S e t t h e o u t p u t o f t h e O U T P U T t e r m i n a l t o t h e m a x i m u m
v a l u e .
2
600kHz 1 00dB 6OOkHz T4
3
Repeat steps 1 to 2.
4 l 4 O O k H z 30dB
1 4 O O k H z TC4
5
6 O O k H z
30dB 600kHz
T3
6
Repeat steps 4 to 5.
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