Diagrams; Note For Printed Wiring Boards And Scehmatic Diagrams - Sony ST-EX880 Service Manual

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5-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
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 / W or less unless otherwise
4
specified.
• : internal component.
¢
• 2 : nonflammable resistor.
• C : panel designation.
Note: The components identified by mark ! or dotted line
with mark ! are critical for safety.
Replace only with part number specified.
• U : B+ Line.
• V : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
( ) : AM (MW)
〈〈 〉〉 : STAND BY
[ ] : MUTING ON
• 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
f
: AM (MW)
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• Circuit Boards Location
TRANSFORMER board
w w w
PANEL board
.
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SECTION 5

DIAGRAMS

Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• ¢ : internal component.
• Indication of transistor.
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B C E
These are omitted.
Abbreviation:
HK : Hong Kong
JE : Tourist
MY : Malaysia
SP : Singapore
AC OUTLET board
(Tourist model)
MAIN board
x a o u 1 6 3
y
RDS board
i (ST-EX880)
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http://www.xiaoyu163.com
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• Waveforms
– MAIN Section –
1 IC51 1 (XIN)
2.9Vp-p
4.5 MHz
2 IC201 $¡ (X2)
4.4Vp-p
10 MHz
3 IC201 $¢ (XT2)
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4.8Vp-p
32.768 kHz
c o
.
2 4 2
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– PANEL Section –
4 IC901 @º (XOUT)
5.2Vp-p
513 kHz
5 IC901 @¡ (XIN)
880 mVp-p
504 kHz
5 0 8 9 2 4 9 8 2
m
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ST-EX880/MS717
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