Sony SA-WD200 Service Manual page 3

1-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• : Through hole.
a
• b : Pattern from the side which enables seeing.
• Indication of transistor
Q
B C E
These are omitted.
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.
• Circuit Boards Location
LED board
POWER-SW board
CONTROL board
SECTION 1
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 Ω and
1 / W or less unless otherwise
4
specified.
• 2 : nonflammable resistor
• C : panel designation
Note: Note:
The components identi- Les composants identifiés par
une marque 0 sont critiques
fied by mark 0 or dotted
line with mark 0 are criti- pour la sécurité.
Ne les remplacer que par une
cal for safety.
Replace only with part piéce por tant le numéro
number specified. spécifié.
• A : B+ Line
• B : B– Line
• Voltages are dc with respect to ground under no-signal
conditions.
• Voltages are taken with a VOM (input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path
F : AUDIO
• Abbreviation
CND : Canadian model
MY : Malaysia model
SP : Singapore model
POWER SUPPLY
board
AC SELECT board (MY, SP)
INPUT-SELECT board
INPUT board
• IC Block Diagrams
IC901 STR-F6676 (AEP, UK, MY, SP)
LATCH O.V.P.
COMP.1
T.S.D.
OSC DRIVE
COMP.2
1 2 3 4
FB/OCP S D VCC
IC901 STR-F6426S (US, CND)
LATCH O.V.P.
COMP.1
T.S.D.
OSC DRIVE
COMP.2
1 2 3 4
FB/OCP S D VCC
3 3
START
REG.
ICONST
5
GND
START
REG.
5
GND
SA-WD200