TUNER SECTION
0 dB=1µV
Note: As a FM front end (U1) is difficult to repair if faulty, replace
it with new one. (AEP, UK models)
AM Tuning Voltage Adjustment
+
–
Tuner board
DC voltmeter
loop antenna
Field strength dB (µV/m) = SSG output level dB (µV/m) –26dB.
loop antenna
(Supplied accessories)
AM RF SSG
30% amplitude
modulation by
400Hz signal
60cm
set
AM antenna
terminal (JK101)
Procedure:
1. Tune the set to 600 kHz (10 kHz step) or 603 kHz (9 kHz step).
2. Set the output of AM RF SSG so that the input level of the set
3. Adjust L104 so that when the waveform on the oscilloscope is
4. Tune the set to 1,400 kHz (10 kHz step) or 1404 kHz (9 kHz
DC voltmeter
TP2
(VT)
Tuner board
+
–
Procedure :
1. Set the reception frequency of the unit to 87.5 MHz.
2. Adjust L103 for 1.2 ± 0.05V reading on the DC voltmeter.
3. Set the reception frequency of the unit to 108 MHz.
4. Confirm that the voltage reading on the DC voltmeter is within
7.8 ± 0.5V.
Adjustment Location: TUNER board
5. Adjust TC102 so that when the waveform on the oscilloscope is
maximum, no noise appears.
• Repeat the procedures in each adjustment several times, and the
tracking adjustment should be finally done by the trimmer
capacitors.
Adjustment Location: TUNER board
TP2
(VT)
Procedure:
1. Set the reception frequency of the unit to 530 kHz (10 kHz step)
or 531 kHz (9 kHz step).
2. Adjust L105 for 1.2 ± 0.05 V reading on the DC voltmeter.
3. Set the reception frequency of the unit to 1,710 kHz (10 kHz
step) or 1602 kHz (9 kHz step).
4. Confirm that the voltage reading on the DC voltmeter is within
8.0 ± 0.5 V.
Adjustment Location: TUNER board
AM Tracking Adjustment
FM Tuning Voltage Adjustment
(EXCEPT AEP, UK models)
www. xiaoyu163. com
QQ 376315150
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
