WM-GX670/GX674
— 22 — — 23 —
6-4. SCHEMATIC DIAGRAM (2/2)
— 24 —
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.
• % : indicates tolerance.
• U : B+ Line.
• C : panel designation.
• H : adjustment for repair.
• Power voltage is dc 1.5 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : REC/PLAY
( ) : REC (TAPE)
[ ] : PLAY (TAPE)
• 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.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F : FM
E : PLAY (TAPE)
a : REC (TAPE)
2
IC2 !¶ VCO 5µsec/div
50mV/div
3
IC801 5 PLAY 5µsec/div
1V/div
75kHz
4
IC3 &¢ XOUT 5µsec/div
0.5V/div
• Waveform
12
A
B
C
D
E
F
G
H
I
J
K
L
M
345678910111213141516171819
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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