WM-FX141
4-2. SCHEMATIC DIAGRAM — MAIN SECTION —
— 11 — — 12 —
• Waveform
1
IC1 !∞
1.5 Vp-p
19kHz
1µsec/div
0.5V/div
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and
1
/
4
W or less unless otherwise
specified.
•
¢
: internal component.
• U : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 3V and fed with regulated dc power
supply from external power voltage jack (J301) .
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
( ) : PB
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
• Signal path.
F : FM
f : AM
E : PB
• Abbreviation
EE : East European model
5E : Chilean model
6E : Latin America model
8E : Central and South America model
MX : Mexican model
L5
THP602 2k 1000PPM
C1
*
JR5
JR1
C5
*
R1
*
L1
L3
L4
C4
*
C3
*
L2
C2
*
C18
*
C19
*
R602
*
R601
*
R603
*
R201
*
R202
*
R102
*
R101
*
US,5E,6E,8E
E,MX,AEP
C1
1PF
1PF
3PF
EE
C4
6PF
6PF
9PF
C5
33PF
33PF
0.0022uF/100v
C18,C19
0.018uF
0.012uF
0.012uF
C2
18PF
18PF
6PF
C3
22PF
22PF
8PF
R1
22
22
18
R101,R201
0
10
0
R102,R202
180k
39k
180k
R601
3.9
1.5
1.5
R602
5.6
2.2
2.2
R603
750
680
680
*
J302
M901
(REEL/CAPSTAN)
US,5E,6E,8E
MODEL
JC6
LOCAL
E,MX,EE,AEP MODEL
DX
S303(2/2)
L1
AM FERRITE-ROD ANTENNA
JC2
JC3
LPF
C16 0.022
CP1
*
↓
↓
→→ →→
↑
AM IF
2.8
2.8
2.8
0
1.5
1.5
0.8
2
10.7
MHz
AM
TRACKING
L1,CT1
TUNING
CV1-4
FM TRACKING
L2,CT2
FM FREQ. COVER
L3,CT3
AM FREQ. COVER
L4,CT4
AEP,E,MX,EE
MODEL
0
0
0
0
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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