Realistic STA-115 - Signal Strength

REPAI
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REPAIR
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Less than2.O%
(Nominal:
0.8%)**
(1)
ReadjustAM
lFlRF.
(Seepage
29Ior AM lF
&
RF
ALIGNMENT.)
(2)
Check
AM RF/lF circuits.
Distortion
is higher
than
2.Oo/o
Distortion is
less
than 2.0%.
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_v/11._l
*"
Falls
within
200mV
t2.5
dB.
(1)
Readjust
AM lFlRF.
(See
page
29for
AM lF
& RF
ALIGNMENT.)
(2)
Check the value
of
R259.
(3)
Check
AM lF detector
circuit.
Tape
Out
level
does not
fall
within
200mV
t2.S
dB.
Tape
Out
level falls
within 200mV
t2.5
dB.
L.I"9I,
19
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**5.0mV/m
=
All LEDs
light up.*"
SIGNAL STRENGTH
NO SIGNAL INPUT
SIGNAL
STRENGTH
INPUT 5.O
mV/m
Figure 19
(1)
Verify
LEDs
function on
FM: return
to
AM.
(2)
Check the value of R255.
(3)
Check the AM lF circuits.
(4)
See TROUB LESHOOTING on
page
35.
Signal
LED
meter
does not indicate correctly.
Signal
LED meter
indicates
correctly.
Proceed
to next
section.
23