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 M
Ω
).
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 5
µ
sec/div
50mV/div
3
IC801
5
PLAY 5
µ
sec/div
1V/div
75kHz
4
IC3
&¢
XOUT 5
µ
sec/div
0.5V/div
• Waveform
1
2
A
B
C
D
E
F
G
H
I
J
K
L
M
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
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
