Realistic STA-7 - Page 13

REPAIR
R EPAI R
CONNECTION
STEP
5
REPAIR
Check
AM Distortion
(lnput
level
to
5 mV/m).
(1)
Readjust
AM
lFlR
F Alignment.
(21
Check AM I
F/R F
circuit.
Distortion
is
greater
than
3.5 %.
Distortion
is less
than
3.5 Yo.
Check
the AM
Signal Meter Pointer.
(1)
No
signal
-
0
point
t
0.8
m/m
(21
5 mV/m lnput
-
75-85
%
(See
Figure
10.)
No
'TGNAL
rNpur
/
0.8mm
Figure
10
0.8mm
75-85o/o
Adjust
value of R
150.
Signal
Meter
pointer
does not
indicate
correctly.
Signal Meter
pointer
indicates
correctly.
Same equipmentconnection
as Figure
gand
set lnput level
to 5
mV/m.
Check AM
TAPE OUT
Level.
Check
and adjust value
of
R
162.
TAPE
OUT
Level
does not fall within
21O
r
2.5
mV.
TAPE
OUT
Level
falls
within
21O
*-
2.5 mV.
INPUT:5mV/m
Proceed
to
next
section.
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