Sanyo DC-MCR300 Service Manual page 12

IC BLOCK DIAGRAM & DESCRIPTION
IC150 LB1641L (Bidirectional Motor Driver)
P1 OUT1 VCC2 OUT2 P2
3 8 10
INPUT LOGIC CIRCUIT
IN1 5
GND
1
IC441 TC9422F (Volume Control)
INPUT
SELECTOR
L-IN1 2
L-IN2 3
L-IN3 4
L-IN4 5
L-SW-OUT 6
L-VR-IN 7
L-B1 8
L-B2 9
L-B3 10
CAPACITOR FOR
OSCILLATION
L-Tone-OUT 11
500
13k
L-T1 12
750
VCC
9 7
PRE-
VZ
4
DRIVE
IN2
6
GND
1
100k
GAIN CONTROL
0, 6, 12, 18dB
MAIN VR
50k / 64STEP
50k
BASS VR
50k /
16STEP
TREBLE VR
50k /
16STEP
50k 50k
13 14
Vref CK
Input Output
IN1 IN2 OUT1
0 0 0
1 0 1
0 1 0
1 1 0
V
DD
28
GAIN CONTROL
0, 6, 12, 18dB
50k / 64STEP
BASS VR
50k /
16STEP
TREBLE VR
50k /
16STEP
32BIT SR
15 16
DATA STB
- 11 -
Action
OUT2
0 Brake
0 Normal(Reverse)Rotary
1 Reverse(Normal)Rotary
0 Brake
INPUT
SELECTOR
100k
27
26
25
24
23
MAIN VR
22
21
50k
20
19
CAPACITOR FOR
OSCILLATION
18
500
13k
17
750
R-IN1
R-IN2
R-IN3
R-IN4
R-SW-OUT
R-VR-IN
R-B1
R-B2
R-B3
R-Tone-OUT
R-T1