Read Sony DHC-EX880MD / DHC-MD717 / ST-EX880 / ST-MS717 Service Manual online
ST-EX880/MS717
– 7 –
– 8 –
SECTION 5
DIAGRAMS
5-1.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
¢
: internal component.
•
2
: nonflammable resistor.
•
C
: panel designation.
Note on Printed Wiring Boards:
• X
: parts extracted from the component side.
•
¢
: internal component.
• Indication of transistor.
Abbreviation:
HK
: Hong Kong
JE
: Tourist
MY
: Malaysia
SP
: Singapore
•
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
(
no mark : FM
(
) : AM (MW)
〈〈
〉〉
: STAND BY
[
] : MUTING ON
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: FM
f
: AM (MW)
Note: The components identified by mark
!
or dotted line
with mark
!
are critical for safety.
Replace only with part number specified.
B
These are omitted.
C
E
Q
• Circuit Boards Location
• Waveforms
– MAIN Section –
– MAIN Section –
1
IC51
1
(XIN)
2
IC201
$¡
(X2)
3
IC201
$¢
(XT2)
2.9Vp-p
4.5 MHz
– PANEL Section –
4
IC901
@º
(XOUT)
5
IC901
@¡
(XIN)
4.4Vp-p
10 MHz
4.8Vp-p
32.768 kHz
5.2Vp-p
513 kHz
880 mVp-p
504 kHz
AC OUTLET board
(Tourist model)
(Tourist model)
TRANSFORMER board
PANEL board
RDS board
(ST-EX880)
(ST-EX880)
MAIN board
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