Sony SA-VE225 Service Manual page 3

Circuit Boards Location
SA-WMS225
POWER IC board
POWER SW board
LED board
CONTROL board
• IC Block Diagrams
– MAIN Board –
IC302
OVER LOAD DET
MAIN board
1 2
– POWER IC Board –
IC401 TDA7294
TRANSCONDACTANCE
1 2 3
3 3
PC1237HA
V CC ON
F/F
MUTE
OFFSET DET
LATCH/
AUTORESET
AC OFF
DET
3 4 5 6 7 8
THERMAL
BIPOLAR
SHUTDOWN
INPUT STAGE
MOS GAIN & MOS SHORT
–
LEVEL SHIFTING OUTPUT CIRCUIT
+
STAGE STAGE PROTECTION
STANDBY/
MUTE
BOOST-
STRAP
4 5 6 7 8 9 10 11 12 13 14 15
SA-VE225/WMS225/SS-CN225/V225