Epson TM-U675 - Impact Head Drive

Rev.D Product Overview Appendix D-55
TM-U675/U675P (with autocutter) Service Manual
Confidential
Slip Mechanism Drive Function
The main functions of the slip mechanism are described below:
❏ Impact head drive
❏
Carriage motor drive
❏
Paper feed motor drive
❏
Lever motor drive
❏
Lever drive
❏
MICR solenoid drive circuit
❏ MICR signal detection circuit
❏
Detection circuits
Impact Head Drive
The impact head drive unit consists of the head solenoid drive and common drive. The head
drive circuit diagram is shown below.
Figure D-50
VCC
CR_DET
THERM
(
103HT
)
E/P E
HEAD #3
HEAD #6
GND
THERM
(
10K
)
E/P D
E/P F
HEAD #7
E/P COM
HP
_
DET
HEAD COM
(
3,5,7
)
E/P COM
E/P B
E/P C
HEAD #1
VCC
HEAD #2
HEAD COM
(
1,2,9
)
HEAD #5
E/P A
HEAD COM
(
8,4,6
)
HEAD #4
E/P H
E/P G
E/P COM
NC
HEAD #9
HEAD #8
COMMON
(
24V
)
SHEAD5
SHEAD2
CR_HP
HH7
EP_D
SHEAD4
SHEAD1
SHEAD3
HH1
SHEAD8
HH9
EP_E
EP
_
F
EP
_
H
HH2
SHEAD9
HH4
EP
_
C
HH5
EP_G
SHEAD6
HH6
HH3
EP_A
HH8
EP_B
SHEAD7
D7
1
3
4
D10
1
2
34
5
6
QM7
3
5
2
1
4
QM5
3
5
2
1
4
CN28
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
27
27
28
28
29
29
30
30
QM4
3
5
2
1
4
Q12
1
23
D11
1
2
34
5
6
R45
1 2
R56
1 2
R48
1 2
QM6
8
6
4
2
9
7
5
3
10 1
R471 2
D6
1
3
4
QM3
8
6
4
2
9
7
5
3
10 1
QM2
3
5
2
1
4
R63
1 2
R541 2
R65
1 2
R52
1 2
D9
1
2
34
5
6
Q13
2
3
1
R61
1 2