Schematic Diagram (Changed) - Sony Walkman wm-fx453 Service Manual

SCHEMATIC DIAGRAM
r 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
.
– 9 –
x a o u 1 6 3
y
i
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Q Q
3 7 6 3 1
c o
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– 10 –
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9 9 8
Note :
• All capacitors are in µF unless otherwise noted. pF: µµF
50WV or less are not indicated except for electrolytics and
tantalums.
• All resistors are in and 1 / W or less unless otherwise
4
specified.
• ¢ : internal component.
• B + : B+ Line
• : adjustment for repair.
• Power voltage is dc 3V and fed with regulated dc power supply
from external power voltage jack (J302).
• Voltage and waveforms are dc with respect to ground under
no-signal ( detuned ) conditions.
no mark : FM (RADIO SECTION), PLAY (TAPE SECTION)
( ) : AM
5 1 5 0 8 9 2 4 9
m
– 11 –
WM-FX453/FX455
2
9 9
• Voltages are taken with a VOM ( Input impedance
10M ). Voltage variations may be noted due to
normal production tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal
production tolerances.
• Circled numbers refer to waveforms.
• Signal path.
: FM : PB
• Abbreviation
CND : Canadian
EE : East European
IT : Italian
5E : Indication of country of origin
8 2 9 9
r WAVEFORM
1
1.83Vp-p
75kHz
IC701 @¢
VOLT/DIV : 0.5V AC
TIME/DIV : 5µsec