Sony SA-WP890 - SECTION 1 DIAGRAMS

3
SA-WP890
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.
• Indication of transistor.
Note on Schematic Diagrams:
• 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 and dc with respect to ground under no-signal
conditions.
no mark : Power on
•Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Signal path.
F : 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
C
B
These are omitted.
E
Q
B
These are omitted.
CE
B
These are omitted.
CE
Q
INPUT CONTROL board
SWITCH board
LED board
MAIN board
POWER TRANS board
Note: The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.