Paper Feed Motor Drive Circuit; Table 2-9. Paper Feed Motor Drive Modes; Figure 2-22. Paper Feed Motor Drive Circuit Diagram - Epson Stylus Pro Service Manual

Operating Principles

2.3.2.4 Paper Feed Motor Drive Circuit

The paper feed motor for this printer drives the following mechanisms:
r Paper feed mechanism
r Paper pickup mechanism
r Pump mechanism
Driver IC SLA7041MS (IC14) drives the paper feed motor by a constant current. The operation principle is
same as for the carriage motor drive circuit. But the paper feed motor drives not only the paper feed
mechanism but also the pump unit. (Refer to Section 2.2.4.)

Table 2-9. Paper Feed Motor Drive Modes

Mode
Paper feed
Pump drive
E05A96
(IC2)
P FC L K
PFSTB
PFA
PFB
PFVRF
(PB8-PB13)
PFHLD

Figure 2-22. Paper Feed Motor Drive Circuit Diagram

2-18
Phase Excitation
2-2 phase or 2W1-2 phase
2-2 phase
42 5
16
43 2
13
41 6
40 17
3
14
57
9
10
C
B E
NPN Tr
(Q25, 26)
Stylus Pro Service Manual
Drive Frequency
391 or 1600 pps
300 or 1800 pps
SLA7041MS
(IC14)
C L K A
C L K B
S T B A
S T B B A
A
DATA A
DATA B B
REF A
B
REF B
RSA
RSB
1 1
8 2
11 3
(CN7)
18 4
+35 V 5
Rev.A