Sony SA-WFT7 - Manual (Page 10)

10
SA-FT7ED/WFT7/SS-CNF7ED/FRF7ED/WS-FT7
SECTION 3
DIAGRAMS
3-1. CIRCUIT BOARDS LOCATION
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. (p: pF)
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.
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 portant le numéro
spécifié.
• A : B+ Line.
• B : B– Line.
• Voltage is dc with respect to ground under no-signal
(detuned) condition.
• Voltages are taken with a VOM (Input impedance 10 M Ω ).
Voltage variations may be noted due to normal produc-
tion tolerances.
no mark : POWER ON
∗ : Impossible to measure
• Signal path.
F : LINE
• Abbreviation
CND : Canadian model.
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• : Pattern from the side which enables seeing.
• Abbreviation
CND : Canadian model.
C
B
These are omitted.
E
Q
B
These are omitted.
C
Q
Q
E
B C E
LED board
SW board
AMP board
FILTER board
POWER board
ACIN board
INPUT board