Circuit Boards Location - Sony CDX-MP80 Service Manual

4-5. CIRCUIT BOARDS LOCATION

SWITCH board
KEY board
• Waveforms
— Servo Board —
(MODE: CD PLAY)
5
1
0.7Vp-p
22.7µsec
IC2 qg (RFAC) IC1 ih (LRCK)
2 6
0V
474msec
Approx. 200mVp-p
(FE) (BCK)
IC2 qh IC1 o;
3 7
0V
Approx. 600mVp-p
16.9344MHz
IC2 qk (TE) IC1 of (XTAO)
4 8
3.3Vp-p
7.6µsec
12.288MHz
IC1 rd (MDP)
IC11 yg (XTXAL)
SERVO board
MAIN board
Main Board
— —
1
3Vp-p
3.5Vp-p
32.768kHz
IC501 uf (XOA)
2
2.2Vp-p
3.8Vp-p
3.68MHz
IC501 os (XO)
3
3Vp-p
1.2Vp-p
18.432MHz
IC702 ih (EXTAL)
4
2.2Vp-p
5.2Vp-p
4.332MHz
IC202 4 (OSCD)
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 / W or less unless otherwise
4
specified.
• % : indicates tolerance.
• : internal component.
f
• C : panel designation.
Note:
Note:
Les composants identifiés par
The components identi-
fied by mark 0 or dotted une marque 0 sont critiques
line with mark 0 are criti-
pour la sécurité.
cal for safety. Ne les remplacer que par une
Replace only with part piéce portant le numéro
number specified. spécifié.
• 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 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 : AM/MW/LW
J : CD
for printed wiring boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• : parts mounted on the conductor side.
x
• : Through hole.
a
• : 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.
Key Board
— —
1
2.2Vp-p
4MHz
IC903 4 (XOUT)
25 25
CDX-MP80