7
7
D-EJ011
D-EJ011
Note on Printed Wiring Boards.
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
a
: Through hole.
•
f
: internal component
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Note for Printed Wiring Boards and Schematic Diagrams
Note on Schematic Diagrams.
• All capacitors are in
µ
F unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal tolerance.
•
C
: panel designation.
•
A
: B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 3 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD PLAY
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
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.
J
: CD PLAY
Caution:
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.
• Indication of transistor.
Note: The components identified by mark
0
or dotted line
with mark ! are critical for safety.
Replace only with part number specified.
SECTION 5
DIAGRAMS
C
B
These are omitted.
E
Q
D
G
These are omitted.
S
Q
• Waverforms
1
IC601
yj
XO
2 V/DIV, 50
n
s/DIV
59.5 ns
4.5 Vp-p
2
IC801
yd
XOUT4M
2 V/DIV, 0.1
µ
s/DIV
244 ns
3.5 Vp-p
Summary of Contents for CD Walkman D-EJ011
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