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4-4. SCHEMATIC DIAGRAM
Refer to page 20 for IC Block Diagrams.
z
Q Q
3 7 6 3 1 5 1 5 0
T E
L
1 3 9 4 2 2 9 6 5 1 3
w w w
.
– 17 –
x
a o
u 1 6 3
y
i
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8
Q
Q
3
7
6
3
1
c o
.
– 18 –
http://www.xiaoyu163.com
2
4
9
9
8
Waveforms
r
1
425 mVp-p
75 kHz
IC702 1
VOLT/DIV : 0.1 V AC
XOUT
TIME/DIV : 5 µsec
2
1.8 Vp-p
319 nsec
VOLT/DIV : 0.5 V AC
Q401 C
TIME/DIV : 0.1 µsec
3
55 mVp-p
319 nsec
VOLT/DIV : 10mV AC
Q401 B
TIME/DIV : 0.1 µsec
5
1
5
0
8
9
2
4
9
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
/
W or less unless otherwise
4
specified.
•
: internal component.
f
• U : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 3V 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 : FM
(
) : AM (RADIO SECTION),
PLAY (TAPE SECTION)
<
> : TV
• Voltages are taken with a VOM (Input impedance 10 MΩ).
m
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, TV
E
: PB
– 19 –
WM-FX277/FX467/FX467ST
2
9
9
8
2
9
9
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