Read Sony CFD-E55L Service Manual online
– 13 –
TUNER SECTION
0 dB=1
µ
V
[MW/LW]
Setting:
Function : RADIO
BAND button : MW or LW
Function : RADIO
BAND button : MW or LW
[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
MAIN board
CNP311 pin
CNP311 pin
3
MAIN board
CNP311 pin
CNP311 pin
4
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
MAIN board
CNP311 pin
CNP311 pin
3
MAIN board
CNP311 pin
CNP311 pin
4
set
3.2
Ω
0.01
µ
F
MAIN board
TP (GND)
TP (GND)
MAIN board
TP (ANT)
TP (ANT)
digital voltmeter
TP (VT)
TP (GND)
100 k
Ω
MAIN board
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
450 kHz
MW VCO VOLTAGE CONFIRMATION
Frequency Display
Reading on Digital Voltmeter
531 kHz
1.0 ± 0.3 V
1,611 kHz
5.0 ± 0.4 V
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3-1
621 kHz
CT2
1,404 kHz
LW VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L4
153 kHz
0.6
Confirmation
279 kHz
4.7 ± 0.5 V
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3-2
162 kHz
CT3
261 kHz
FM VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L2
108 MHz
4.0 ± 0.1 V
Confirmation
87.5 MHz
1.6 ± 0.2 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
87.5 MHz
CT1
108 MHz
Adjustment Location: MAIN board (See page 14)
+ 0.1 V
– 0.05 V
– 0.05 V
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