– 13 –
TUNER SECTION 0 dB=1 µV
[MW/LW]
Setting:
Function : RADIO
BAND button : MW or LW
[FM]
Setting:
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.
• 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
set
3.2
Ω
MAIN board
CNP311 pin
3
MAIN board
CNP311 pin
4
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
+
–
level meter
MAIN board
CNP311 pin
3
MAIN board
CNP311 pin
4
set
3.2
Ω
0.01
µ
F
MAIN board
TP (GND)
MAIN board
TP (ANT)
digital voltmete
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
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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