– 17 – – 18 –MDX-65
4-4. PRINTED WIRING BOARDS — SERVO SECTION —
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 1/4 W or less unless otherwise
specified.
• % : indicates tolerance.
•C: panel designation.
for printed wiring boards
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•r: Through hole.
•b: Pattern from the side which enables seeing.
(The other layer’s patterns are not indicated.)
•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
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.
Note:
The components identi-
fied by mark ! or dotted
line with mark ! are criti-
cal for safety.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque ! sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.