— 8 —
• Switch Location
VOLUME : MAX
MEGA BASS : OFF
AVLS : NORMAL
[AM Tracking Adjustment]
BAND: AM
Signal generator
[FM Tracking Adjustment]
BAND : FM
Signal generator
AM TRACKING ADJUSTMENT
Adjust for maximum reading on level meter.
L1 620 kHz
CT1 1,400 kHz
TUNER SECTION
Put the lead-wire
antenna close to
the set.
30 % amplitude modulation by 400 Hz
signal.
Output level : as low as possible
AM RF signal
generator
0.01
µ
F
FM RF signal
generator
FM IN
point (TP22)
75 kHz(100 %) amplitude modulation
by 1kHz signal.
Output level: as low as possible
16
Ω
set
level mete
J301 (phones)
• Repeat the procedures in each adjustment several times for the
maximum level meter indication.
• The frequency coverage and tracking adjustments should be
finally done by the trimmer capacitors.
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a 1.1V ± 0.1Vde reading on digital voltmeter
L2 530 kHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1 450 kHz
FM TRACKING ADJUSTMENT
Adjust for maximum reading on level meter.
L3 86.5 MHz
CT2 109.5 MHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a 2.5V ± 0.1Vde reading on digital voltmeter
L4 87.5 MHz
Adjustment Location: Main board (See page 9)
0 dB = 1 µV
+
–
digital voltmete
TP30(VT)
(GND)
MAIN board
[AM Frequency Coverage Adjustment]
[FM Frequency Coverage Adjustment]
+
–
digital voltmete
TP30(VT)
(GND)
MAIN board
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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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