Sony SA-WCT770 Service Manual page 27

– POWER Board –
IC910 STR-A6159M
OVER
SOURCE/OCP 1
CURRENT
PROTECTION
BLANKING
VCC 2
GND 3
FB/OLP 4
IC920 STR-W6735N (US, Canadian and Taiwan models)
IC920 STR-W6765N (Except US, Canadian and Taiwan models)
D 1
NC 2
S/GND 3
VCC 4
SS/OLP 5
FB 6
FB
+
–
OCP
–
+
BD
+
–
OCP/BD 7
BUFFER
DISCHARGE
OVER LOAD
PROTECTION
OVER VOLTAGE
PROTECTION
DELAY
THERMAL
SHUTDOWN
INTERNAL UNDERVOLTAGE
BIAS LOCKOUT
DRIVE
REGULATOR
PROTECTION
LATCH
R
DELAY
Q
S
SOFT START
S
Q
R OSC
BSD
–
BOTTOM
+ SELECTOR
COUNTER
+
–
FEED
BACK
BURST
BIAS
R S
PWM
LATCH Q
LATCH
+
REGULATOR
START/STOP
& ICONST
–
BURST
BURST
CONTROL
OVP
OLP
+
–
Q
R
S
SA-WCT770
Ver. 1.1
OFF TIMER
8 D
7 D
DRIVE
6 NC
5 STARTUP
27