Sanyo DC-PT70 Service Manual page 20

IC BLOCK DIAGRAM & DESCRIPTION
IC160 IKE80-E(Power Amp.)
FWD
REV
VCCP2
VLO-
VLO+
VO4+
VO4-
VO3+
VO3-
VO2+
VO2-
VO1-
VO1+
VCCP1
VCCS 15
VIN1+
VIN1-
VIN1
1
Input
2
3
4
Output
control
5
6
Level
shift
7
8
Level
shift
9
Power
stem
FR
GND
10
Level
shift
11
12
Level
shift
13
14
Signal stem
power supply
16
11k
17
18
Thermal shutdown
(Load outout voltage set)
MUTE
Match CH:ON/OFF
H:Output ON, L:Output OFF
44k
11k
REG IN
REG OUT
44k
11k
44k
44k
11k
- 19 -
Signal stem GND
36 SGND
35
VCONT
34 MUTE1
CH1
33 MUTE234
CH2,3,4
32 VIN4-
To VREFOUT
31 VIN4
30 VREF_IN
29 VREF_OUT
28 REG_OUT
(VCC)
Power
stem
GND
FR
27 REG_IN
26 VIN+OP
25 VIN-OP
24
VO_OP
23 VIN3
22 VIN3-
To VREFOUT
21 VIN2
20 VIN2-
VIN2+
19