Sony CFD-E75 - TUNER SECTION ADJUSTMENT DETAILS

16
CFD-E75
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1 450 kHz
AM VCO VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L4 530 kHz 1.0 ± 0.05 V
Confirmation 1,710 kHz 5.3 ± 0.7 V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3 620 kHz
CT3 1,400 kHz
FM IF ADJUSTMENT
Adjust for a minimum reading on level meter
T2 10.7 MHz
FM VCO VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L2 108 MHz 3.0 ± 0.2 V
Confirmation 87.5 MHz 1.3 ± 0.3 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1 87.5 MHz
CT1 108 MHz
Adjustment Location: TUNER and POWER board (See page 16)
TUNER SECTION 0 dB=1 µV
[AM]
Setting:
Function : RADIO
RADIO BAND button : AM
[FM]
Setting:
Function : RADIO
RADIO BAND button: FM
• Repeat the procedures in each adjustment several times, and the
tracking adjustments should be finally done by the trimmer ca-
pacitors.
• Remove FM antenna in FM adjustment.
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
Put the lead-wire
antenna close to
the set.
+
–
level mete
r
set
3.2 Ω
POWER board
CNP392 pin 2
POWER board
CNP392 pin 1
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level:
as low as possible
+
–
level mete
r
POWER board
CNP392 pin 2
POWER board
CNP392 pin 1
set
3.2 Ω
0.01 µF
TUNER board
TP (GND)
TUNER board
TP (ANT)
digital voltmete
r
TP (VT)
TP (GND)
100 k Ω
TUNER board