Sony CFD-G70 Service Manual page 14

CFD-G70
0dB = 1 µV
TUNER SECTION
AM Section
Function switch : AM
Volume : MIN
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
FM Section
Function switch : FM
Volume : MIN
FM RF signal
generator
33.75kHz frequency deviation by
1kHz signal.
Output level : as low as possible
• Connecting Level Meter (FM and AM)
set
J391 ( i jack)
• Connecting Digital Voltmeter (FM and AM)
100 kΩ
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.
14
Put the lead-wire
antenna close to
the set.
0.01µF
telescopic
antenna
terminal
level meter
(range: 0.5–5 V ac)
32 Ω
digital
voltmeter
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
AM FREQUENCY COVERAGE CHECK
Frequency Display
Reading on Digital voltmeter
Adjustment Part
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
620 kHz
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2
FM FREQUENCY COVERAGE ADJUSTMENT
Frequency Display
Reading on Digital voltmeter
Adjustment Part
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
87.5 MHz
• Abbreviation
E4 : 110-120V/220-240V AC changeable.
Adjustment Location : Main board (See page 16)
450 kHz
(
530 kHz 1,710 kHz
(530 kHz) (1,610 kHz)
1.0 ± 0.1 V 5.3 ± 0.8V
(1.0 ± 0.1 V) (4.8 ± 0.8V)
< L 4 > <confirmation>
CT3
1,400 kHz
10.7 MHz
87.5 MHz 108 MHz
1.3 ± 0.4 V 3.0 ± 0.3 V
<confirmation> L2
CT1
108 MHz
): E4