Realistic STA-115 - Page 19

REPAIR
REPAIR
p!e+
r*Eii1t,et
1,tq
[tal
*"
TONE
CONTROL
Curve
(Figure
14)*"
(1)
Check treble
control circuit
on TUNER
AUDIO
P.C.B.
(2)
See TROUBLESHOOTING
on
page
35.
Frequency
response
does not fall
within
t1012.5
dB.
Frequency
response
falls
within
t
10
i2.5
dB.
Check LOUDNESS
compensation
at 48mV
R-MS;tp;tl.r"r]
*"LOUDNESS
Curve"*
Figure
15
roo
tr
+
AUDIO FBEQUENCy
(Hz)
(1)
Check loudness
circuit on
TUNER
AUDIO
P.C.B.
(2)
See TROUBLESHOOTING
on
page
35.
Loudness
compensation
does not
fall
within
+
6
t2.5
dB
at 100 Hz
and
+
4.5
t2.5
dB at
10
kHz.
Loudness
compensation falls
within
+
6
!2.5
dB at
100 Hz
and
+
4.5
t2.5
dB at
10
kHz.
Proceed
to
the next section.
ll)
g
r..u
t,
z
o
e^
a+b
UJ
cc
+4.5
l.
(-30
dB volume
position)
i
-19-