Read Sony ICD-BP220 Service Manual online
6
ICD-BP220
SECTION 3
DIAGRAMS
Note on Schematic Diagrams:
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
•
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 and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : REC
(
no mark : REC
(
) : PB
• 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.
E
: PB
a
: REC
*
Replacement of IC109 used in this set requires a special
tool.
tool.
•
The voltage and waveform of CSP (chip size package)
cannot be measured, because its lead layout is different
from that of conventional IC.
cannot be measured, because its lead layout is different
from that of conventional IC.
Note on Printed Wiring Boards:
• Y
• Y
: parts extracted from the conductor side.
• b
: Pattern from the side which enables seeing.
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.
*
Replacement of IC109 used in this set requires a special
tool.
tool.
•
Lead layouts
• WAVEFORMS
1.3 Vp-p
4.096 MHz
1
IC712
od
XTAL
VOLT/DIV : 0.5 V AC
TIME/DIV : 50 nsec
TIME/DIV : 50 nsec
0.8 Vp-p
3.2 Vp-p
32.768 kHz
2
IC716
8
oscout
3
IC508
5
EXT
VOLT/DIV : 0.2 V AC
TIME/DIV : 10
TIME/DIV : 10
µ
sec
VOLT/DIV : 1.0 V DC
TIME/DIV : 2
TIME/DIV : 2
µ
sec
3.3
µ
s
surface
Lead layout of
conventional IC
CSP (chip size package)
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