Tuner Section - Sony PMC-107 Service Manual

0 dB = 1 µV

TUNER SECTION

• FM Section
Setting:
BAND switch: FM
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz signal
output level : as low as possible
• AM Section
Setting:
BAND switch: AM
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
• Connecting Level Meter (FM and AM)
set
phones jack
• Connecting Digital Voltmeter (FM and AM)
100 k Ω
TP (VT)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
TP (FM ANT)
0.01 µ F
set
Put the lead-wire
antenna close to
the supplied MW/LW
loop antenna.
level meter
(range: 0.5–5 V ac)
32 Ω
digital
voltmeter
FM FREQUENCY COVERAGE
Frequency Display
Reading on Digital voltmeter
Adjustment Part
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L5
87.6 MHz
AM FREQUENCY COVERAGE
Frequency Display
Reading on Digital voltmeter
Adjustment Part
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L9
620 kHz (621 kHz)
( ) : Australian model.
Adjustment Location: See page 15.
– 14 –
ADJUSTMENT
87.6 MHz 108 MHz
1.8 ± 0.2 V 5.6 ± 0.2V
L6 <confirmation>
CT1
108 MHz
ADJUSTMENT
530 kHz 1,710 kHz
(531 kHz) (1,611 kHz)
6.5 ± 0.2V
0.9 ± 0.2 V
(5.6 ± 0.2V)
L2
CT4
1,400 kHz (1,404 kHz)
CT2