Read Sony ST-SDB900 Service Manual online
8
ST-SDB900
• Waveforms
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics and
tantalums.
tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
• %
: indicates tolerance.
•
f
: internal component.
•
2
: nonflammable resistor.
•
C
: panel designation.
•
A
: B+ Line.
•
B
: B– Line.
• Voltages and waveforms are dc with respect to ground un-
der no-signal conditions.
No mark : FM
No mark : FM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production
tolerances.
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
g
: ANALOG OUT
I
: DIGITAL OUT
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
(In addition to this necessary note is printed in each block.)
(In addition to this necessary note is printed in each block.)
Note on Printed Wiring Board:
•
•
X
: parts extracted from the component side.
•
a
: Through hole.
•
: Pattern from the side which enables seeing.
Caution:
Pattern face side: Parts on the parts face side seen from
(Side A)
Pattern face side: Parts on the parts face side seen from
(Side A)
the parts face are indicated.
Parts face side:
Parts on the pattern face side seen from
(Side B)
the pattern face are indicated.
Note: The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
– MAIN Board –
1.8432 MHz
2V AC/DIV
0.2
µ
sec/DIV
4.5 Vp-p
1
IC300
wl
SCKO
16 MHz
0.5V AC/DIV
50nsec/DIV
1 Vp-p
2
IC300
is
XO
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