Drive Circuit For Reverse Motor - Toshiba MR-3011 Service Manual

10.4 Drive Circuit for Reverse Motor

SGND
TP43 TP52 TP44 TP53
1 1 1 1
RETM_A
RETM_*A
RETM_B
RETM_*B
TP45 TP42
R86
1 1 2
RETM_RA
1 1
R89 C26
2 2
R96
SGND
This circuit controls the rotation/stoppage, direction of rotation and motor current of the reverse motor.
The following drive pattern signals are input to IC9-6, 7, 21 and 22pins to control the direction and speed of
motor rotation. The motor current value is set by separating the output voltage of the D/A converter at R86 and
R89, and inputting it into IC9-4 and 24pins. Motor current value can be changed by changing the D/A output
voltage.
Drive pattern signals....1-2 phase excitation
October 2000 © TOSHIBA TEC
8 6 4 2
7 5 3 1
7
INA
6
IN*A
21
INB
22
IN*B
13
RsA
15
RsB
8
PGA
20
PGB
PGND
1 4
VrefA
24
VrefB
R83
1 2 5
VsA
R82
1 2 23
VsB
2
NC1
1 1 1 1
9
C38 R97 C37
NC2
11
2 2 2 2
NC3
12
NC4
PGND
RETM_A
RETM_*A
RETM_B
RETM_*B
IC9
12
OutA
10
Out*A
14
COM
15
OutB
18
Out*B
3
C/RA
25
C/RB
+5V
1
VCC 1 1
27 R93 R92
LG
2 2
+ 1 1
C54 2 2
C67 C55
26
NC6
19
NC5
SGND
10-4 MR-3011/3012 DESCRIPTION OF CIRCUITS
PM+24V
6
PH+24V CN12.6
ZD3
1 2 5
PH+24V CN12.5
4
A CN12.4
3
*A CN12.3
2
B CN12.2
1
*B CN12.1
K 1 K 1 K 1 K 1 + 1
C40
A 2 A 2 A 2 A 2 2
D5 D6 D7 D8
PGND
1
2
Reverse motor
RVMOT