Paper Feed Motor Driver Circuit; Carriage Motor Driver Circuit - Epson TM-U200 Series Technical Manual

C o n fid e n tia l

Paper feed motor driver circuit

The paper feed motor (stepping motor) possesses an accurate angle of rotation and permits
speed control. It is driven with 2-2 phase excitation. By turning P53 of the CPU to LOW, +24 V
(labeled +24C signal in the figure below) is applied to the COM terminal of its coil, and it is
made to run by changing P90 and P92 to HIGH and LOW. Its speed is determined by the speed
of changing P90 and P92 between HIGH and LOW. At the end of paper feeding, P53 of the CPU
is once again set to HIGH.
Q113
nPFCOM
U5
56 PF A/DSW5
P90/M10
58 PF C/DSW7
P92/M12
+24C

Carriage motor driver circuit

The carriage motor (stepping motor) possesses an accurate angle of rotation and permits speed
control. It is driven with 2-2 phase excitation. By turning P52 of the CPU to LOW, +24 V (labeled
+24B signal in the figure below) is applied to the COM terminal of its coil, and it is made to run
by changing P20, P21, P22, and P23 to HIGH and LOW. Its speed is determined by the speed of
changing P20, P21, P22, and P23 between HIGH and LOW. At the end of paper feeding, P52 of
the CPU is once again set to HIGH.
+24B
U5
QM101
52 CR A/DSW1
3
P20/M00
CR C/DSW3
54 5
P22/M02
53 CR B/DSW2
P21/M01
55 CR D/DSW4
P23/M03
2-28 Mechanism Configuration and Operating Principles
+5V
R102
+5V
PF C/DSW7
+5V
QM103
4
RM104
3 2
1 8
2 7
3 6
5 1 4 5
DM122
Figure 2-27 Paper feed motor driver circuit
+5V
DM120
4
2 4 1
3 2
1
QM102 4
3 2
1
5 1
2
3
4
DM121
4 1
3 2
Figure 2-28 Carriage motor driving circuit
DM107
1
3
QM4
1
2
8 9
DM108
6 7
1
3
4 5
2
2 3
DM109
1
1
3 D10
0
2
DM110
1
3
2
+24B
D9
QM3
1
RM104
8 8 9
7
6
6 7
5
4 5
2 3
1
0
Paper feed motor
Ł [ ^
CN6
(ROTOR)
1 PF A
1
2 PF C
2
3 PF COM
3
4 PF B
4
5 PF D
5
+24C
Carriage motor
L b W [ ^
CN5
(ROTOR)
1 CR A
1
2 CR C
2
3 CR COM
3
4 CR B
4
5 CR D
5
Rev. A