Note For Printed Wiring Boards And Schematic Diagrams - Sony SCD-C222ES Service Manual

6-6.

NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

Note on Printed Wiring Board:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• : 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
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.
• Main board is multi-layer printed board.
However, the patterns of intermediate-layer have not been
included in diagram.
• Indication of transistor
C
Q These are omitted.
B E
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 Ω and
1 / W or less unless otherwise
4
specified.
• : internal component.
f
• 5 : fusible resistor.
• C : panel designation.
Note:
Note:
The components identi- Les composants identifiés par
fied by mark 0 or dotted une marque 0 sont critiques
line with mark 0 are criti-
pour la sécurité.
cal for safety. Ne les remplacer que par une
Replace only with part pièce por tant le numéro
number specified. spécifié.
• A : B+ Line.
• B : B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : SACD PLAY
( ) : CD PLAY
∗
: 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.
J
: SACD PLAY
c : CD PLAY (ANALOG OUT)
I : CD PLAY (DIGITAL OUT)
• Circuit Boards Location
POWER SW board
RM board
KEY board
LED board
DISPLAY board
LOADING MOTOR board
SENSOR board
35 35
SCD-C222ES
AUDIO board
MAIN board
POWER board
HEADPHONE board
RF board
JUNCTION board
REG board
PT board