SA-WD200 - Sony Audio Service Manual (repair manual). Page 3

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SA-WD200
SECTION 1
DIAGRAMS
1-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Board:
• X
: parts extracted from the component side.
•
a
: Through hole.
• b
: Pattern from the side which enables seeing.
•
Indication of transistor
B
These are omitted.
C
E
Q

Note on Schematic Diagram:
• All capacitors are in 
µ
F unless otherwise noted.  pF: 
µµ
F
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.
•
2
: nonflammable resistor
•
C
: panel designation
•
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 M
Ω
).
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
• Circuit Boards Location

Note:
The components identi-
fied by mark 
0
 or dotted
line with mark 
0
 are criti-
cal for safety.
Replace only with part
number specified.

Note:
Les composants identifiés par
une marque 
0
 sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
INPUT board
INPUT-SELECT board
AC SELECT board (MY, SP)
POWER SUPPLY
board
LED board
POWER-SW board
CONTROL board
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.
• IC Block Diagrams
IC901
 
STR-F6426S (US, CND)
5
4
3
2
1
OSC
DRIVE
ICONST
START
REG.
T.S.D.
LATCH
O.V.P.
D
S
GND
VCC
FB/OCP
COMP.1
COMP.2
5
4
3
2
1
OSC
DRIVE
START
REG.
T.S.D.
LATCH
O.V.P.
D
S
GND
VCC
FB/OCP
COMP.1
COMP.2
IC901
 
STR-F6676 (AEP, UK, MY, SP)
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