Read Sony HT-K250 / SA-WMSP250 Service Manual online
6
SA-WMSP250
2-1. BLOCK DIAGRAMS — POWER SECTION —
T901
AC
IN
+5.6V
REG
1
3
IC905
LF901,902
LINE
FILTER
D903
F901
REG
Q905
D
3
OCP/SYNC
1
VCC
4
GND
2
FB/OLP
5
IC901
SWITCHING REG
PC901
RECT
D911
D916
D302
D303
D301
D906
ERROR
AMP
2
1
IC902
+6.2V
REG
1
2
IC907
5
+12V
REG
1
2
IC903
5
Q906, 908
SWITCH
D919
D920
PC902
RESET
8
5
6
IC910
PWCNT2
PWCONT2
VCONT
PWCONT1
STOP
STOP
D/AOUT
STOP
PWCNT1
+3.3V
REG
1
3
IC908
+28V
+6.2V
+3.3V
+1.8V
REG
1
3
IC112
+1.8V
STREAM
PROCESSORS
+2.6V
REG
1
3
IC607
+2.6V
+5V
+3.3V
REG
1
75
63
76
52
3
IC906
+3.3V
FOR
FLASH
PROGRAMMING
+5.6V
+5.6V
+12V
Q901, 903
SWITCH
Q913, 915
BUFFER
Q902, D905
REG
IC904
VCC
IC904
1
3
2
IC501 (2/2)
SYSTEM CONTROL
CNP602 (2/2)
CONTROL
POWER
TO
STR-VE250
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