CFD-G70 - Sony Audio Service Manual (repair manual). Page 14

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