Sony ICF-C733 - Page 7

¢ 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.