Note For Printed Wiring Boards And Schematic Diagrams - Sony CDP-CX220 Service Manual

7-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
Note on 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 and
specified.
• : internal component.
¢
• C : panel designation.
Note:
The components identi-
fied by mark ! or dotted
line with mark ! are criti-
cal for safety.
Replace only with part
number specified.
• U : B+ Line.
• V : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark: PLAY
• Voltages are taken with a VOM (Input impedance 10 M ).
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.
J
: CD
c : digital out
• Abbreviation
AED : North European
AUS : Australian model.
CND : Canadian model.
E2 : 120 V AC Area in E model.
E3 : 240 V AC Area in E model.
SP : Singapore model.
1
/ W or less unless otherwise
4
Note:
Les composants identifiés par
une marque ! sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• : internal component.
¢
• b : Pattern from the side which enables seeing.
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
• : Solder bridge.
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
• Indication of transistor.
C
Q
These are omitted.
B E
Q
B C E
These are omitted.
Q
B C E
These are omitted.
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