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3-2.
RADIO
SECTION
AM
SECTION
Procedure:
Setting:
Mode: playback
FUNCTION switch: AM (MW/LW/SW)
Tape
Speed
Adjustment
speed
checker
LFM-30
FINE TUING:
mechanical mid
or
AM
ff signal
digital
frequency
generator
test. tape
sounter
Put the lead-wire
WS-48A
antenna
close
to
(3kHz, OdB)
pe
the set.
322
oO
a Pe
|
Headphones
jack
CS
ed
30%
amplitude
modulation
by
400Hz_
signal
VIVM
(range: 0.5-5V
ac)
Adjustment
Value:
+3%
2,910 to 3,090 Hz
Frequency
difference
between
the
beginning
and
the end
of
the
tape
should
be within
1.5%
(45Hz).
Headphones
jack
¢ Repeat the procedures in each adjustment several times, and
the frequency
coverage
and tracking adjustments should be
finally
done
by the
trimmer
capacitors.
Adjustment
Location:
AM IF ADJUSTMENT
Adjust for a maximum reading on VTVM.
adjustment resistor
M301
LS:MW FREQUENCY COVERAGE
Adjust for a maximum reading on VIVM.
160kHz
260kHz
L7:LW
FREQUENCY
COVERAGE
L8:SW TRACKING
*
7MHz
*: Extend telescopic antenna
fully.
FM
SECTION
Setting:
VCO
Adjustment
FUNCTION switch: FM
FM ft signal
Procedure:
generator
.
FM
ff signal
telescopic
generator
antenna
400Hz,
30%
FM
modulation
frequency
deviation
+22.5kHz
output
level: as
low
as
possible
Carrier
frequency: 98MHz
telescopic
Modulation : no
modulation
antenna
lead
Output
level: 0.1V
(100dB)
1. Connect frequency counter to TP (VCO).
2.
Tune
the set to 98MHz.
3.
Adjust
RV1
for 76kHz+500Hz
reading
on the frequency
counter.
Adjustment Location: tuner board (component side)
frequency counter
r-CT6:SW
FREQUENCY
COVERAGE
CT7:LW
FREQUENCY
COVERAGE
TI:AM
IF °
Li:FM
TRACKING
L2:FM
FREQUENCY
COVERAGE
CT2:FM
FREQUENCY
COVERAGE
A [o]
»
a. @
| &
L3:MW
TRACKING
CT1:FM
TRACKING
RV1:FM
VCO
CT10:LW
TRACKING
L10:LW
TRACKING
CT3:MW
TRACKING
CT4:MW
FREQUENCY
COVERAGE
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