Sony CFD-G555CP Service Manual page 21

0 dB = 1 µV
TUNER SECTION
• AM Section
Setting:
RADIO BAND•AUTO PRESET button: AM
Put the loop
AM RF signal
antenna close to
generator
the set.
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
• FM Section
Setting:
RADIO BAND•AUTO PRESET button: FM
TUNER board
FM RF signal
TP-ANT(JW2)
generator
0.01 µ F
75 kHz frequency
deviation by 1 kHz
TUNER board
signal
TP (GND)
Output level:
as low as possible
TUNER board
100 k Ω
TP (CV)
TP (GND)
• Repeat the procedures in each adjustment several times, and
the tracking adjustments should be finally done by the trimmer
capacitors.
• Remove FM antenna in FM adjustment.
level meter
32 Ω
+
set
–
i jack (J391)
level meter
32 Ω
+
set
–
i jack (J391)
digital voltmeter
CFD-G555CP/G555CPK
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
450 kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Frequency Display
Reading on Digital voltmeter
Adjustment Part
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
621 kHz
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
10.7 MHz
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
Adjustment Location: See page 22.
T1
531 kHz 1,611 kHz
1.0 ± 0.05 V 4.8 ± 0.7 V
L4 <confirmation>
CT3
1,404 kHz
T2
87.5 MHz 108 MHz
1.3 ± 0.3 V 3.0 ± 0.2 V
<confirmation> L2
CT1
108 MHz
21