Sony SA-WMSP75 - Circuit Board Location; IC Block Diagrams; IC301 STK404-130 S (Main Board); IC301 STK404-100 S (Main Board)

33
SA-WMSP75/WMSP85
SECTION 1
DIAGRAMS
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• b : Pattern from the side which enables seeing.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
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.
• 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 are dc with respect to ground under no-signal
conditions.
no mark : Power on
•Voltages are taken with a VOM (Input impedance 10MΩ).
Voltage variations may be noted due to normal preduction
tolerances.
• Signal path.
F : AUDIO
•Abbreviation
CND : Canadian model.
E2 : 120V AC Area in E model.
MX : Mexican model.
The components identified by
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro spécifié.
1-1. Circuit Board Location
SWITCH BOARD
CONTROL BOARD
POWER TRANS BOAR
D
INPUT(CONTROL) BOARD
MAIN BOARD
1-2. IC Block Diagrams
IC301 STK404-130S (MAIN Board)
2 31 4 5 6 7 8 9 10 11 12 13
SUB
IC301 STK-404-100S (MAIN Board)
1 2 3 4 5 6 7 8 9 10 11 12
SUB