CFD-G55 - Sony Audio Service Manual (repair manual). Page 14

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14
CFD-G55
• 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
 FM Section
Function switch : FM
• 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
µ
F
 0dB = 1 
µV
digital
voltmeter
100 k
Ω
TP  CV
J391 
(
 
i
 
)
set
32 
Ω
level meter
(range: 0.5–5 V ac)
Ver 1.1  2002.05
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
450 kHz
(    ): 9 kHz step (MY, SP, EA)
<  >: 10 kHz step (MY, SP, EA)
no mark: Others
AM FREQUENCY COVERAGE ADJUSTMENT
Frequency Display
530 kHz
1,710 kHz
(531 kHz)
(1,611 kHz)
<530 kHz>
<1,610 kHz>
Reading on Digital voltmeter
1.0 
± 0.1 V
5.3 
± 0.8V
(4.8 
± 0.8V)
<4.8
± 0.8V>
Adjustment Part
 L 4
confirmation
<  >: 9 kHz step (MY, SP, EA)
no mark: Others
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
CT3
620 kHz 
<
621
kHz>
1,400 kHz <1,404 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
MY : Malaysia model.
SP
: Singapore model.
EA
: Saudi Arabia model.

Adjustment Location : TUNER board (See page 16)
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