Daewoo AKD-80C, Service Manual

Page: 24 / 29

DAEWOO
IC 401 (BA6790FP) - 4CH. BTL driver for CDP
1. PIN CONFIGURATION
- 23 -
2. BLOCK DIAGRAM
PIN
No
FUNCTION
Driver channel 1 negative output
Driver channel 1 positive output
Driver channel 1 input
Driver channel 1 input,gain adjustment pin
Connect external transistor base
constant voltage output,connects to
external transistor collector
Mute control pin
Ground
Driver channel 2 input,gain adjustment pin
Driver channel 2 input
Driver channel 2 positive output
Driver channel 2 negative output
Substrate ground
Operational amplifier output
15 OP IN(-)
OP IN(+)
VO3(-)
VO3(+)
VIN3
VIN3+
Vcc
Vcc
BIAS IN
VIN4+
VIN4
VO4(+)
VO4(-)
GND
16
17
18
19
20
21
22
23
24
25
26
27
28
1
2
3
4
5
6
7
8
9
10
11
12
PIN
NAME
VO1(-)
PIN
No
FUNCTION
PIN
NAME
VO1(+)
VIN1
VIN1+
REG-B
REG
OUT
MUTE
GND
VIN2+
VIN2
VO2(+)
VO2(-)
GND
OP OUT
13
14
Operational amplifier input,negative
Operational amplifier input,positive
Driver channel 3 negative output
Driver channel 3 positive output
Driver channel 3 input
Driver channel 3 gain adjustment pin
Power supply
Power supply
Bias amplifier input
Driver channel 4 gain adjustment pin
Driver channel 4 input
Driver channel 4 positive output
Driver channel 4 negative output
Substrate ground