Sony SA-WG99, Service Manual, Page: 3 / 14

3
SA-WG99
SECTION 1
DIAGRAMS
Note on Printed Wiring Boards:
•
X
: Parts extracted from the component side.
• a : Through hole.
• : Pattern from the side which enables seeing.
Note on Schematic Diagrams:
• All capacitors are in
µ
F unless otherwise noted. (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
•
2
: nonflammable resistor.
•
5
: fusible resistor.
• All resistors are in
Ω
and 1 /
4
W or less unless otherwise
specified.
•
C
: panel designation.
•
A
: B+ Line.
•
B
: B– Line.
• Voltages and dc with respect to ground under no-signal
conditions.
no mark : Power on
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production
tolerances.
• Signal path.
d
: AUDIO
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
• Circuit Boards Location
Note:
The components identi-
fied by mark
0
or dot-
ted line with mark
0
are
critical for safety.
Replace only with part
number specified.
Note:
Les composants identifiés
par une marque
0
sont cri-
tiques pour la sécurité.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
POWER board
MAIN board
VOL-LED board
POWER SWITCH board
INPUT board