– 9 – – 11 –– 10 –
r
SCHEMATIC DIAGRAM (WM-FX453 : US model only)
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 (J302).
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM (RADIO SECTION),
PLAY (TAPE SECTION)
( ) : AM
• 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 : PB
WM-FX453/FX455
r
Waveforms
1
IC701 @¢
VOLT/DIV : 0.5 V AC
TIME/DIV : 5 µsec
1.9 Vp-p
75 kHz
2
Q401 C
VOLT/DIV : 0.5 V AC
TIME/DIV : 0.1 µsec
2.6 Vp-
3 MHz
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Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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