25
25
CDX-MP70
SERVO board
MAIN board
KEY board
SWITCH board
Note:
The components identi-
fied by mark
0
or dotted
line with mark
0
are criti-
cal for safety.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
0
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
for 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.
•
%
: indicates tolerance.
•
f
: internal component.
•
C
: panel designation.
•
A
: B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• 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.
F
: FM
f
: AM/MW/LW
J
: CD
for printed wiring boards:
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
x
: parts mounted on the conductor side.
•
a
: Through hole.
•
: Pattern from the side which enables seeing.
(The other layer’s patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A)
parts face are indicated.
4-5. CIRCUIT BOARDS LOCATION
• Waveforms
— Servo Board —
(MODE: CD PLAY)
1
IC2
qg
(RFAC)
0.7Vp-p
2
Approx. 200mVp-p
IC2
qh
(FE)
0V
3
Approx. 600mVp-p
IC2
qk
(TE)
0V
5
6
7
IC1
o;
(BCK)
3Vp-p
8
12.288MHz
IC11
yg
(XTXAL)
2.2Vp-p
3.5Vp-p
16.9344MHz
IC1
of
(XTAO)
3.8Vp-p
474msec
4
IC1
rd
(MDP)
3.3Vp-p
IC1
ih
(LRCK)
7.6µsec
22.7µsec
—
Key Board
—
1
4MHz
IC903
4
(XOUT)
2.2Vp-p
—
Main Board
—
1
2
3.68MHz
IC501
os
(XO)
32.768kHz
IC501
uf
(XOA)
2.2Vp-p
3
18.432MHz
IC702
ih
(EXTAL)
4
4.332MHz
IC202
4
(OSCO)
1.8Vp-p
2.3Vp-p
2.8Vp-p
