Read Sony ICD-B25 Service Manual online
ICD-B25
9
• Waveforms
1.3Vp-p
1
IC712
od
(XTAL)
0.5V/div 50nsec/div
4.096MHz
2
IC716
8
(OSCOUT)
0.2V/div 10µsec/div
32.768kHz
0.8Vp-p
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
Common Note on Schematic Diagrams:
• 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
1
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
C
: panel designation.
•
A
: B+ Line.
• Power voltage is dc 3V and fed with regulated dc power
supply from battery terminal.
• Voltages are taken with a VOM (Input impedance 10 M
1
).
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.
E
: PB
a
: REC
*
IC109 on main board are not replaceable.
• The voltages and Waveform of CSP (chip size package)
cannot be measured, because its lead layout is different
from that of conventional IC.
from that of conventional IC.
Common Note on Printed Wiring Boards:
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
Lead layout of conventional IC CSP (chip size package)
surface
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(SIDE B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(SIDE A)
the parts face are indicated.
*
IC109 on main board are not replaceable.
•
Lead Layouts
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