Read Sony CFD-S28L Service Manual online
– 14 –
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
0.8
1,611 kHz
5
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3-1
621 kHz
CT3
1,404 kHz
LW VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L4
279 kHz
5.3 ± 0.1V
Confirmation
153 kHz
0.7
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3-2
162 kHz
CT5
261 kHz
FM VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L2
108 MHz
4.3 ± 0.1 V
Confirmation
87.5 MHz
1.6 ± 0.4 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
87.5 MHz
CT1
108 MHz
Adjustment Location: TUNER board (See page 15)
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
32
Ω
2
jack (J301)
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
2
jack (J301)
set
32
Ω
0.01
µ
F
antenna terminal
digital voltmeter
TUNER board
JW17
100 k
Ω
+ 0.7 V
– 0.5 V
– 0.5 V
+ 0.3 V
– 0.4 V
– 0.4 V
+ 1.2 V
– 0.6 V
– 0.6 V
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