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5
4
4
+15V
3
3
RL911
2
2
-15V
D920
1
1
RIVER
BUFFER
BI901
Q919
Q925
RELAY
DRIVER
D_+7.5V
7
13
9
8
+3.7V(UCON)
12
4
A__+15V
11
A_-15V
1
-B_CONT
AMP_SOUT
5
AMP_SIN
6
AMP_CLK
2
AMP_STB
3
AMP_INT
10
POWER
CNP901
TIMING_CK
AC_DETECT
+12V
V
V
ETECT
NT
CON)
2
IC912
KIA7812AP
Q911
VOLTAGE
REGULATOR
Q921
3
1
Q922
2
Q924
IC913
S812C37A
3.7V REGULATOR
3
2
1
Figure 17 BLOCK DIAGRAM (7/9)
2
1
1
IC911
3
SE-B2
D911
ERROR
3
AMP.
TRS901
Q920
D913
1
3
2
A_+15V
A_-15V
TIMING_CK
Q923
AC_DETECT
Q918
– 17 –
PC901
Q901
T901
SWITCHING POWER TRANSFORMER
AC LINE
SO901
AC INLET
AC 120V, 60 Hz
AC POWER
SUPPLY CORD
SD-AT50
3
4
Vin
FB/SYNC
5
1
OCP
SYNC
2
GND
D901
L902
FILTER
L901
AC LINE
FILTER
F901
6A/125V
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