Sony CFD-G555CP - Electrical Adjustments: Tuner and CD Sections

21
CFD-G555CP/G555CPK
TUNER SECTION 0 dB = 1 µV
• AM Section
Setting:
RADIO BAND•AUTO PRESET button: AM
•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.
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
450 kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Frequency Display 531 kHz 1,611 kHz
Reading on Digital voltmeter 1.0 ± 0.05 V 4.8 ± 0.7 V
Adjustment Part L4 <confirmation>
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 CT3
621 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 ± 0.3 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
Adjustment Location: See page 22.
• FM Section
Setting:
RADIO BAND•AUTO PRESET button: FM
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
Put the loop
antenna close to
the set.
+
–
level meter
set
32 Ω
i jack (J391)
FM RF signal
generator
75 kHz frequency
deviation by 1 kHz
signal
Output level:
as low as possible
+
–
level meter
set
32 Ω
0.01 µ F
TUNER board
TP (GND)
TUNER board
TP-ANT(JW2)
i jack (J391)
digital voltmeter
TP (CV)
TP (GND)
100 kΩ
TUNER board