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D-NE240/NE241/NE241CK
Q Q
3 7 6 3 1 5 1 5 0
• Note for Printed Wiring Boards and Schematic Diagrams
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
: internal component.
f
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
Parts on the pattern face side seen from
(Conductor Side)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Component Side) the parts face are indicated.
T E
L
1 3 9 4 2 2 9 6 5 1 3
w w w
D-NE240/NE241/NE241CK
SECTION 6
DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. (p: pF)
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.
• 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 in
no-signal conditions.
no mark : CD PLAY
• 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.
J
: CD PLAY
x
a o
.
i
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• Waveforms
– MAIN Board –
IC601 tg (CLK)
1
2.2 Vp-p
237 ns
1 V/DIV, 100 ns/DIV
IC601 th (CLK88)
2
3.1 Vp-p
11.3 µs
1 V/DIV, 5 µ s/DIV
IC601 ya (XO)
3
1.6Vp-p
Q
Q
59.4 ns
3
7
6
500 mV/DIV, 20 ns/DIV
u 1 6 3
y
8
8
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2
4
8
9
9
3
1
5
1
5
0
8
9
2
m
c o
.
2
8
9
9
4
9
8
2
9
9
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