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¢ AM Section
Setting :
BAND switch : AM
AM PF signai
generator
Put the lead-wire
ws
antenna close to
O
A
the set.
C
30% amplitude modulation
by 400 Hz signal
output level : as low as possible
¢ FM Section
Setting :
BAND switch : FM
FM FF signal
generator
+ 22.5kHz frequency
{
deviation by 400 Hz signal
lead antenna
output level : as low as possible
terminal
VTVM
(range : 0.5 — 5V ac)
speaker terminal
¢ Repeat the procedures in each adjustment several times, and the
VCO voltage and the tracking adjustments should be finally
done by the trimmer capacitors.
AM
IF ADJUSTMENT
Tl
450kHz
AM VCO VOLTAGE ADJUSTMENT
Reading
on Digital
Adjustment Part
Frequency Display
531kHz
2.85+0.1V
1,602kHz
less than 11V
Note :Not use the AM RF signal generator in this adjustment.
FM VCO VOLTAGE CHECK
Readi
Digital
Adjustment Part
Frequency Display
87.5MHz
108MHz
check 10.5 + 1.0V
Note :Not use the FM RF signal generator in this adjustment.
FM TRACKING
ADJUSTMENT
Adjust for a maximum reading on VTVM.
cr
87.5MHz
108MHz
Adjustment Location : MAIN board (Component Side)
Lt
CT1
AM TRACKING
AM TRACKING
ADJUSTMENT
ADJUSTMENT
FM TRACKING
ADJUSTMENT
a
S ©
CT3
a
FM TRACKIN
IC1
ADJUSTMENT
T1
L6
AMIiF
AM VCO VOLTAGE
R27
ADJUSTMENT
digital
voltmeter
LPF OUT
(VCO VOLTAGE)
* mark is mounted on conductor side.
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