Read Sony CFD-E90 Service Manual online
16
CFD-E90
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
450 kHz
AM VCO VOLTAGE ADJUSTMENT
Frequency Display
Reading on Digital Voltmeter
530 kHz
1.0 ± 0.1 V
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 RELAY board (See page 17)
TUNER SECTION
0 dB=1
µ
V
[AM]
Setting:
Function : RADIO
BAND button : AM
Function : RADIO
BAND button : AM
[FM]
Setting:
Function : RADIO
BAND button: FM
Function : 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.
pacitors.
• Remove FM antenna in FM adjustment.
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
modulation by
400 Hz signal
Output level:
as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
+
–
–
level meter
set
3.2
Ω
RELAY board
CN325 pin
CN325 pin
2
RELAY board
CN325 pin
CN325 pin
1
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level:
as low as possible
deviation by 400 Hz
signal
Output level:
as low as possible
+
–
–
level meter
RELAY board
CN325 pin
CN325 pin
2
RELAY board
CN325 pin
CN325 pin
1
set
3.2
Ω
0.01
µ
F
TUNER board
TP (GND)
TP (GND)
TUNER board
TP (ANT)
TP (ANT)
digital voltmeter
TP (VT)
TP (GND)
100 k
Ω
TUNER board
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