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

10.3 Drive Circuit for Read Motor

TP38 TP37 TP31 TP36 TP35
1 1 1 1
READ_M1
READ_M2
READ_CMD
READ_CLK
READ_ON
*RESET
TP34
R85
1 2 1
REACM_DA
2
R105
1
This circuit controls the rotation/stoppage and the direction of rotation, excitation mode and motor current of the
read motor.
A drive clock signal (READM_CLK) and rotation direction signal (CWB) are input to control the speed and
direction of the motor rotation. When the CPU judges the level of the enabling signal is "L", IC10-15pin
(READ_EN) becomes "L" level and turns OFF all the outputs from the drive IC regardless of the state of other
signals.
The output voltage of the D/A converter is separated at R85 and R105, and input into IC10-7pin to set the motor
current value. The motor current value can be changed by altering the D/A output voltage.
October 2000 © TOSHIBA TEC
4 RA6.2
1 3
RA6.3
6 5
RA6.1
2 1
RA6.4
8 7
R104
1 2
R99
1 2
1
13
-
14
IC4.4
12
+
C27 C28 C29
TP33
1 1 1 1
C33
2 2 2 2
SGND
+5V
C21 C25
2 1 1 2
6
PGND Vcc2 SGND
8
M1
IC10
9 5
M2 A
12 4
M3 *A
SGND
10 3
CWB B
11 2
CLK *B
15
ENABLE
14
MOI
13
*RESET
7 1
Vref PG
C30 C31 C32 C36
1 1 1 1
2 2 2 2
10-3 MR-3011/3012 DESCRIPTION OF CIRCUITS
PM+24V
6
PH+24V
5
PH+24V
4
A
3
*A
2
B
1
*B
1 1 1 1 + 1
C112
2 2 2 2 2
C47 C48 C49 C50
PGND
CN10.6
CN10.5
CN10.4
READ motor
CN10.3
RDMOT
CN10.2
CN10.1