Printed Wiring Boards -Servo Section - Sony MDX-65 Service Manual

MDX-65
THIS NOTE IS COMMON FOR PRINDED WIRING BOARDS
AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
for schematic diagrams
• 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.
• C : panel designation.
Note: Note:
The components identi- Les composants identifiés par
fied by mark ! or dotted une marque ! sont critiques
pour la sécurité.
line with mark ! are criti-
Ne les remplacer que par une
cal for safety.
piéce portant le numéro
Replace only with part
spécifié.
number specified.
• U : B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from Master unit.
• Voltage and waveforms are dc with respect to ground
under no-signal conditions.
no mark : PB
∗
: Impossible to measure
• 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.
E
: PB
for printed wiring boards
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• : Through hole.
r
• b : 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.
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4-4. PRINTED WIRING BOARDS — SERVO SECTION —
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