Sony Walkman WM-FX267, Руководство по обслуживанию

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Note on Schematic Diagram:
• 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.
•
C
: panel designation.
• U : B+ Line.
• Power voltage is dc 3 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 : FM
(
) : AM (MW)
〈〈 〉〉
: TAPE PLAYBACK
• 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
f
: AM (MW)
E
: TAPE PLAYBACK
• Abbreviation
FR : French
• Waveforms
1
IC401
!£
(XIN)
500 mV/DIV, 5µs/DIV
2
T301 (SECONDARY)
5 V/DIV, 200 ns/DIV
1.5 Vp-p
75.2 kHz
2 Vp-p
3.38 MHz
0.3 Vp-p
3.38 MHz
20.6 Vp-p
2.53 MHz
3
Q307 (COLLECTOR)
500 mV/DIV, 100 ns/DIV
4
Q307 (BASE)
100 mV/DIV, 100 ns/DIV