Sony CFD-G550CP - Tuner Section Electrical Adjustments; AM;FM Tuning and Alignment; Measurement Setup for Adjustments

17
CFD-G550CP
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
450 kHz
AM FREQUENCY COVERAGE
ADJUSTMENT
Frequency Display 530 kHz 1,710 kHz
Reading on Digital voltmeter 1.0 ± 0.05 V 5.3 ± 0.7 V
Adjustment Part L4 <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 ± 0.3 V 3.0 ± 0.2 V
Adjustment Part <confirmation> L2
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 CT1
87.5 MHz 108 MHz
digital
voltmeter
100 k
Ω
TP (VT)
i jack (J391)
set
32
Ω
level meter
(range: 0.5–5 V ac
)
Put the lead-wire
antenna close to
the set.
AM RF signal
generator
TP (FM IN)
FM RF signal
generator
0.01
µ F
set
TUNER SECTION 0 dB = 1 µV
• AM Section
Setting:
RADIO BAND•AUTO PRESET button: AM
30% amplitude
modulation by
400 Hz signal
• FM Section
Setting:
RADIO BAND•AUTO PRESET button: FM
75 kHz frequency
deviation by 1 kHz signal
output level : as low as possible
• Connecting Level Meter (FM and AM)
Adjustment Location: See page 18.
• Connecting Digital Voltmeter (FM and AM)
•Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.