Sony SA-WD100 Service Manual page 3

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.
• Circuit Boards Location
POWER SWITCH 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
specified.
• 2 : nonflammable resistor
• C : panel designation
Note:
The components identified
by mark 0 or dotted line
with mark 0 are critical for
safety.
Replace only with part
number specified.
• 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
• Abbreviation
CND : Canadian model
SP
CH
CONTROL board
LED board
1 / W or less unless otherwise
4
Note:
Les composants identifiés
par une marque 0 sont cri-
tiques pour la sécurité.
Ne les remplacer que par
une piéce portant le numéro
spécifié.
: AUDIO
: Singapore model
: Chinese model
MAIN POWER board
INPUT
SELECT board
INPUT board
AUTO POWER board
SA-WD100
Ver 1.1 2002.11
3