Note For Printed Wiring Boards And Schematic Diagrams - Sony HCD-MD1EX - System Service Manual

Circuit Boards Location
SENSOR board
MOTOR board
EJECT board
PANEL board
HP board
AMP board
JOINT board
BD (CD) board
MAIN board
POWER board
SW board
BD (MD) board
– 41 –
7-5.

NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

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 1 / W or less unless otherwise
4
specified.
• : internal component.
¢
• 2 : nonflammable resistor.
• C : panel designation.
Note: Note:
The components identi- Les composants identifiés par
fied by mark ! or dotted une marque ! sont critiques
line with mark ! are criti- pour la sécurité.
Ne les remplacer que par une
cal for safety.
piéce por tant le numéro
Replace only with part
spécifié.
number specified.
• U : B+ Line.
• V : B– Line.
• H : adjustment for repair.
• 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.
F
: FM/AM
E : MD PLAY
q : MD REC
J : CD PLAY (ANALOG OUT)
c : CD PLAY (DEGITAL OUT)
d : TAPE PLAY
G : TAPE REC
• Abbreviation
CND : Canadian model.
HK : Hong Kong model.
SP : Singapore model.
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• : Through hole.
®
• b : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from
(Side B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side A) the parts face are indicated.
• Indication of transistor.
C
Q These are omitted.
B E
Q
B C E
These are omitted.
– 42 –