8
ST-SE370
SECTION 4
ELECTRICAL ADJUSTMENTS
FM Signal Level Adjustment
Procedure:
1. Tune the set to 98 MHz.
2. Push the DISPLAY button for digital signal meter indication.
3. Adjust RV201 to the place where level and “70dB” indication
lights on fluorescent indicator tube.
Adjustment Location:
[MAIN BOARD] — Component Side —
FM RF signal
generator
set
FM ANTENNA
75
Ω
coaxial
(TB101)
Carrier frequency : 98 MHz
Modulation : 1 kHz, 40 kHz deviation
Output level : 6.3 mV (76dB
µ
)
(75
Ω
open)
IC201
CN101
RV201
FM SIGNAL LEVEL
Adjustment
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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