Pioneer ARP-230-0 Service Manual - Page 21
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FM tracking
NOTE: (For SX-202L IHEZI
.
When 87.6MHz can not be receiued with thb unit, ad,just the oscillator (TC7) and then it can be received.
It is prohibited, to receiue 87.2MHz or below and, so after having adjusted the oscillator, make sure that it does not receiue
87.2MHz or below.
AM Tuner Section
o Check that the dial pointer indicates a starbing point.
o Turn ON the MW switch.
o Connect the SIGNAL meter between the terminal no. 1 of complex assembly and the gxound.
Long Wave Section (SX-202L/HE, HEZ only)
o Set the AM BAND switch to the LW position.
Step
FM SG
(40OHz, t75kHz deviationl
Position of
dial pointel
Adjustmont
point
Adjustment procedure
Frequenry
Lewl
1
l O 6 M H z
1 odB
1 0 6 M H z
TC7
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 .
2 .
TC5
3 .
TC6
4 .
C o n f i r m t h a t t h e d i a l p o i n t e r d o e s n o t g e t o u t o f p o s i t i o n a t 1 0 6 M H z a n d 9 8 M H z .
Step
AM SG
(400H2, 30% modulation)
Position of
daal pointor
Adiustment
point
Adjustment procedure
Frequoncy
I
Level
I
1 3 9 5 k H z
1 00dB
1 3 9 5 k H z
TC3
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 .
2 .
603kHz
100d8
603kHz
T3
J .
Set the AM SG to 3OdB output level, repeat steps
t o 2 a b o v e .
4
1 395kHz
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.
6 0 3 k H z
6.
R e p e a t s t e p s 4 t o 5 u n t i l m a x i m u m s e n s i t i v i t y i s a t t a i n e o .
Setp
AM SG
(40OHz, 30% modulationl
Position of
dial pointer
Adjustment
point
Adjustment procrdure
Frequency
Level
I
254kHz
1 00dB
254k{z
TC2
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 .
2 .
1 6 4 k H z
1 0 0 d B
1 6 4 k H z
T5
3 .
S e t t h e A M S G t o 3 0 d B o u t p u t l e v e l , r e p e a t s t e p s 1 t o 2 a b o v e .
4 .
254kHz
50dB
254kHz
T C 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 .
1 6 4 k H z
50dB
1 6 4 k H z
T4
6 .
R e p e a t s t e p s 4 t o 5 u n t i l m a x i m u m s e n s i t i v i t y i s a t t a i n e d .
+ . -