8
8
2-3.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Schematic Diagram:
• 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
/
4
W or less unless otherwise
specified.
•
¢
: internal component.
•
C
: panel designation.
Note on Printed Wiring Board:
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
r
: Through hole.
•
¢
: internal component.
•
b
: 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
(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.
•
U
: B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD PLAY
∗
: Impossible to measure
• 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
Note: The components identified by mark
!
or dotted line
with mark
!
are critical for safety.
Replace only with part number specified.
•
Circuit Boards Location
KEY board
SIGNAL CONNECTOR board
POWER CONNECTOR board
MAIN board
MOTOR board
MD MAIN board
SENSOR board
Approx.
156 mVp-p
• Waveforms (MD MAIN BOARD)
1
IC501
$™
(TEO)
2
IC501
1
(FEO)
Approx.
132 mVp-p
3
IC501
#¡
(RF O)
4
IC502
@º
(LRCK)
Approx.
1.1 Vp-p
5 Vp-p
22
µ
s
5
IC502
@™
(BCK)
5 Vp-p
470 ns
6
IC601
^ª
(X2)
5 Vp-p
236 ns
7
IC301
5
(XTI)
3 Vp-p
59 ns
