Read Sony ICF-B50 Service Manual online
– 5 –
SECTION 3
ELECTRICAL PARTS LIST
• AM Section
Setting :
POWER • BAND switch : AM
POWER • BAND switch : AM
AM RF signal
generator
generator
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
30 % amplitude
modulation by 400 Hz signal
Output level : as low as possible
modulation by 400 Hz signal
Output level : as low as possible
• FM Section
Setting :
POWER • BAND switch : FM
POWER • BAND switch : FM
FM RF signal
generator
generator
telescopic antenna
input terminal
input terminal
22.5 kHz frequency
deviation by 400 Hz signal
Output level : as low as possible
deviation by 400 Hz signal
Output level : as low as possible
• Connecting Level Meter (AM and FM)
set
speaker terminal
32
Ω
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally done
by the trimmer capacitors.
frequency coverage and tracking adjustments should be finally done
by the trimmer capacitors.
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
455 kHz
AM FREQUENCY COVERAGE
ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
CT3
520 kHz
1,650 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
CT4
620 kHz
1,400 kHz
FM FREQUENCY COVERAGE
ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
CT1
75.0 MHz
109.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
CT2
75.0 MHz
109.5 MHz
level meter
(range : 0.5 – 5 Vac)
(range : 0.5 – 5 Vac)
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