Sanyo DC-MM5000 Service Manual page 11

IC BLOCK DIAGRAM & DESCRIPTION
IC103 MM1469XH (CD Driver)
28 27 26
D.BUF
T.S.D
D.BUF D.BUF
1 2 3
Pin No. Symbol
1 ch1 OUT-A Driver ch1 negative output
2 ch1 OUT-B Driver ch1 positive output
3 ch1 IN-A Driver ch1 input
4 ch1 IN-B Driver ch1 input gain adjustment pin
5 Tr-B Connect to external transistor base
6 Constant voltage output connects
V -OUT
REG
to external transistor collector
7 MUTE Driver mute control
8 GND1 Ground 1
9 ch2 IN-B Driver ch2 intput gain adjustment pin
10 ch2 IN-A Driver ch2 intput
11 ch2 OUT-B Driver ch2 positive output
12 ch2 OUT-A Driver ch2 negative output
13 GND2 Substrate ground
14 OP OUT Operational amplifier output
IC132 LB1641L (Bidirectional Motor Driver)
P1 OUT1 VCC2 OUT2
3
INPUT LOGIC CIRCUIT
IN1
5
GND
1
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25 24 23 22
D.BUF
Vcc
4 5 6 7
Description
P2 VCC
8 10 9 7
PRE-
DRIVE
21 20 19
D.BUF
Vcc
DRIVER MUTE
D.BUF
8 9 10
Pin No. Symbol
15 OP IN(-) Operational amplifier input, negative
16 OP IN(+) Operational amplifier input, positive
17 ch3 OUT-A Driver ch3 negative output
18 ch3 OUT-B Driver ch3 positive output
19 ch3 IN-A Driver ch3 input
20 ch3 IN-B Driver ch3 input gain adjustment pin
21 Vee1
22 Vee2
23 BIAS-IN Bias amplifier input
24 ch4 IN-B Driver ch4 input gain adjustment pin
25 ch4 IN-A Driver ch4 input
26 ch4 OUT-B Driver ch4 positive output
27 ch4 OUT-A Driver ch4 negative output
28 GND3 Substrate ground
4 VZ
Input Output
IN1 IN2 OUT1
0 0 0
1 0 1
0 1 0
1 1 0
6 IN2
- 10 -
18 17 16 15
D.BUF
D.BUF
11 12 13 14
Description
Action
OUT2
0 Brake
0 Normal(Reverse)
Rotary
1
Reverse(Normal)
Rotary
0 Brake