Realistic STA-115 - Page 20

REPAIR
CHECK
REPAIR
14
12
10
8
6
4
2
dB0
-4
-6
-8
_10
-12
-t4
i
Ch."k
n-igl-'-ti
lGislop. rflt
n,
tcrt
oirlieqff"yil
**
FILTER Curves
(Figure
16)""
(1)
Check
high
filter circuit
on TUNER AUDIO
P.C.B.
(2)
See TROUBLESHOOTING on
page
35.
Filter
slope
is less than
6.0
dB/oct at7
kHz.
Filter
slope is
better than 6.0 dB/oct at 7 kHz.
;_C_ne_cl<_3Q_tlz_cy1!i!t9r_slorqy,_t!!ryr_qollrgt_Uil
j
"*FILTER
Curves
(Figure
16)**
(1)
Check 30
Hz
cut
filter
circuit
on
TUNER AUDIO
P.C.B.
(2)
See TROUBLESHOOTING on
page
35.
Filter
slope
is less
than 18.0 dB/oct.
Filter
slope
is better
than
18.0
dB/oct.
FILTER
CURVES
100
Frequency
(Hz)
Figure
16
30 Hz ut Filter :
OFF
\
'i:=--
\
,( \
\.o
I
Hz
Cut
Fi
o*\
BA{ iS Contrr
l
Max
H
qh-F
Iter
I
OFF
I
I
, /
I
--
I
I
'T
lt
/
3OHzC Filter :
I
)N
lt
I
JU riz
uut
Frlter
I
UFF
I
I
10
-20-
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