Circuit Boards Location - Sony CDX-M730 Service Manual

CDX-M730

4-5. CIRCUIT BOARDS LOCATION

IN SELF SW board
SW board
DISPLAY board
LOAD-SW board
KEY board
• Waveforms
— Servo Board —
(MODE: CD PLAY)
1
1.8Vp-p
19.9344MHz
IC1 wd (XTAL)
2
5Vp-p
3.3msec
ts (PACK)
IC1
3
1.5Vp-p
(RFO)
IC1 uj
4
0V
Approx. 100mVp-p
IC1 oa (FEO)
5
0V
Approx. 100mVp-p
od (TEO)
IC1
SL SW board
SERVO board
tuner unit
(TU601)
MAIN board
SUB(CD) board
• Waveforms
— Main Board —
(MODE: FM)
1
3.8Vp-p
4.3MHz
IC601 4 (XO)
2
5.4Vp-p
32.768kHz
uf (XOA)
IC801
3
2.6Vp-p
3.68MHz
IC801 os (XO)
4
3.8Vp-p
18.43MHz
IC301 ih (EXTAL)
5
3.5Vp-p
4MHz
IC803 4 (XOUT)
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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.
30