Sony SA-WMS225 - Component Layout and IC Block Diagrams; Main Board IC Block Diagram; Power IC Board IC Block Diagram

SA-VE225/WMS225/SS-CN225/V225
33
THERMAL
SHUTDOWN
BIPOLAR
TRANSCONDACTANCE
INPUT STAGE
STANDBY/
MUTE
BOOST-
STRAP
MOS GAIN &
LEVEL SHIFTING
STAGE
STBY-GND
IN– IN+
IN+ MUTE
NC
BOOSTSTRAP
+VS –VS
STBY
MUTE
NC NC
+PWVS
OUT
–PWVS
14 1512 1310 118 96 753 41 2
+
–
MOS
OUTPUT
STAGE
SHORT
CIRCUIT
PROTECTION
1 2 3
4 5 6 7 8
OVER LOAD DET
F/F
OFFSET DET
LATCH/
AUTORESET
V
CC ON
MUTE
AC OFF
DET
OVER LOAD DET
OFFSET DET
AUTO RESET
AC OFF DET
GND
RELAY DRIVE VCC ON MUTE
VCC
• IC Block Diagrams
– MAIN Board –
IC302 µPC1237HA
• Circuit Boards Location
SA-WMS225
POWER IC board
POWER SW board
LED board
CONTROL board
MAIN board
– POWER IC Board –
IC401 TDA7294