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SCHEMATIC DIAGRAM (WM-FX453 : US model only)
r
– 9 –
– 10 –
WM-FX453/FX455
Waveforms
r
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
1
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.
¢
• U : B+ Line.
• H : adjustment for repair.
75 kHz
• Power voltage is dc 3V and fed with regulated dc power
supply from external power voltage jack (J302).
VOLT/DIV : 0.5 V AC
• Voltages and waveforms are dc with respect to ground
IC701 @¢
TIME/DIV : 5 µsec
under no-signal (detuned) conditions.
no mark : FM (RADIO SECTION),
2
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.
3 MHz
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
VOLT/DIV : 0.5 V AC
Q401 C
• Signal path.
TIME/DIV : 0.1 µsec
F
: FM
E
: PB
– 11 –
1.9 Vp-p
2.6 Vp-p
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