8
WM-FX481
Adjustment Location :
FM VCO Adjustment
Procedure :
1. Connect the level meter as shown in the figure.
2. Turn the set to 98MHz.
3. Adjust RV1 so that the wave form to be maximum.
Stereo opration shall be normal.
J301
i
9E,CH
5E,6E
JR3
C40
R207
FB301
FB201
FB101
C35
R21
D5
R2
C9
C16
PWOUT
PWOUT
(R)
(L)
STID
(COM)
PWOUT
GND
FM
IN
MAIN BOARD (SIDE B)
FM RF signal
generator
Carrier frequency : 98MHz
33.75kHz frequency deviation by 1kHz signal.
Modulation : L = -R
Output level : as low as possible
TP
(FM IN)
0.01
µ
F
set
16 Ω
phones jack (J301)
level meter
IC1
[MAIN BOARD] (SIDE A)
RV1 : FM VCO Adjustment
L7 : AM Frequency Coverage Adjustment
RV2 : AM IF Adjustment
L4 : FM Tracking Adjustmen
L3 : AM Tracking Adjustment
CT1 : AM Tracking Adjustment
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Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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