Aiwa CDC-X927M Service Manual page 35

IC BLOCK DIAGRAM -2/3
QQ
3 7 63 1515 0
IC, LA6557H
VCC2
VO5—
VO5+
VO4+
VO4—
VO3+
VO3—
GND
VO2+
VO2—
TE
L 13942296513
VO1+
VO1—
VCC1
VIN1
VINIG
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.
http://www.xiaoyu163.com
CH3,4,5
1
POWER
2
CH5
3
4
CH4
5
6
CH3
7
29
8
CH2
9
10
CH1
11
CH1,2
POWER
12
22k
11k
13
14
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y
i
http://www.xiaoyu163.com
8
Thermal shutdown
Input
MUTE is as follows :
High : Output ON
Low : Output OFF
22k 11k
Signal System Power
5VREG
(External PNPTr)
Q Q
3 6 7 1 3
22k
11k
22k
11k
u163
.
-35-
2 9 9 4 2 8
28
REV
27 FWD
S-GND
26
25
MUTE MUTE
24
VIN4
23
VING4
22
VCC-S
30 GND
VREF-IN
21
20 REG-OUT
1 5 0 5 8 2 9 9 4
19 REG-IN
18
VIN3G
17 VIN3
16
VIN2G
15 VIN2
m
co
9 9
2 8 9 9