Printed Wiring Board - Cd Section - Sony CFD-S250L Service Manual

CFD-S250L
THIS NOTE IS COMMON FOR PRINTED WIRING
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
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.
f
• C : panel designation.
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
• A : B+ Line.
• H : adjustment for repair.
• Total current is measured with no cassette installed.
• Power voltage is dc 9V and fed with regulated dc power
supply from battery terminal.
• 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
: MW
E
: PB
a
: REC
J : CD
Common Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• : internal component.
f
• : Pattern from the side which enables seeing.
6-5. PRINTED WIRING BOARD — CD SECTION — • Refer to page 17 for Circuit Boards Location.
1 2 3
A
B
C
D
C733
C750
E
C706
JW710
F
C738
C739
G
C732
H
I
20
4 5 6
JC702
JC701
R742
M701
JW715
S701
JW722
R712
Q701
CNP701
JW714 C701
JW713
C702
JW712
R730
R711
JW724
R710
R729
R713 C747
C731
R706
C705 JW726
C703
R701
C707
C716
C709
C711
JW703
JW705
JW711
JW704
20
7 8 9
IC702
JW718
JW719
JW721 C741
JW720
C740
R707
M702
C728
R737
R726
JW728
C730
R731
C723
C746
C744 R719
R717
C745
R718
R716
C722
C719 C754
C718
JW731
X701
JW732
R747
FB701 CNP703
JW730
R714
R715
10
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(Page 29)