Circuit Boards Location - Sony CDX-M850MP Service Manual

4-5. CIRCUIT BOARDS LOCATION

DISC IN SW board
SWITCH board
LOAD SW board
DISPLAY board
• Waveforms • Waveforms
— SERVO Board — — MAIN Board
(MODE: CD PLAY) (MODE: FM)
1 1
2.8Vp-p
59ns
wd (XTAL)
IC1 IC502
2 2
1.7Vp-p
IC1 uj (RFO)
IC303
3
3
Approx. 200mVp-p
IC1 oa (FEO) IC303
4
Approx. 300mVp-p
IC1 od (TEO)
5
1.2Vp-p
82ns
IC3 yd (XTAL)
LIMIT SW board
SERVO board
tuner unit
(TUX501)
MAIN board
SUB board
• Waveform
— — DISPLAY Board —
(MODE: FM)
1
3.2Vp-p
30MHz
4.3MHz
qa (XOUT)
4 (OSCD) IC2
1.8Vp-p
32.768kHz
9 (XOUT)
3.6Vp-p
6MHz
qa (OSCOUT)
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
specified.
• % : indicates tolerance.
• : internal component.
f
• C : panel designation.
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.
• 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
c : CD-R/RW (MP3)
• Abbreviation
CND : Canadian model
for printed wiring boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
1.5Vp-p
• : 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.
• Abbreviation
CND : Canadian model
27 27
1 / W or less unless otherwise
4
Note:
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
CDX-M850MP