— 12 —
[AM]
BAND switch : AM
[FM]
BAND : FM
• Repeat the procedures in each adjustment several times.
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
T1 531 kHz
Confirmation 1,710 kHz
FM VCO Adjustment
Procedure :
1. Connect frequency counter to the positions shown below.
2. Tune the set to 98 MHz.
3. Adjust RV1 so that the value of the frequency counter reading
becomes 19 kHz.
Specification Value :
Frequency counter
18,900 – 19,100 Hz
TUNER SECTION
0.01
µ
F
FM RF signal
generator
to ANT (TP1)
22.5kHz frequency deviation by 400Hz signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
AM RF signal
generator
16
Ω
set
+
–
level mete
2
REMOTE jack (J701)
0.01
µ
F
FM RF signal
generator
to ANT (TP1
Carrier frequency : 98MHz
Modulation : no modulation
Output level : 0.1V (100dB)
Frequency counte
1
µ
F
+
–
100k
Ω
TP5
(IC2 Pin
!™
)
TP6
(IC2 Pin
9
)
0dB=1µV
Adjustment Location: MAIN board (See page 11)
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2 450 kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2 76 MHz
Confirmation 108 MHz
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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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