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 XL 4004677 Service Manual

Stylus Pro XL

2.3.2.4 Paper Feed Motor Drive Circuit

The paper feed motor for this printer drives the following mechanisms:
Paper feed mechanism
Paper pickup mechanism
Pump mechanism
Driver IC SLA7041MS (IC14) drives the paper feed motor by a constant current. Its principle of
operation is same as for the carriage motor drive circuit. But the driving method is different for
paper feed and the pump.

Table 2-9. Paper Feed Motor Drive Modes

Mode
Paper feed
Pump drive
E05A96
(IC2)
P FCLK
P FS TB
P FA
P FB
PFV RF
(PB8-PB13)
PFH LD

Figure 2-22. Paper Feed Motor Drive Circuit Diagram

REV.-A
Phase Excitation
2-2 phase or 2 W1-2 phase
2-2 phase
SLA7041MS
(IC14)
4 2 5
1 6
4 3 2
1 3
4 1 6
4 0 1 7
44-48, 39
3
1 4
5 7
9
1 0
C
B E
NPN Tr
(Q25, 26)
Drive Frequency
391 or 1600 pps
300 or 1800 pps
C L K A
C L K B
S TB A
1
S T B B A
8
A
DA TA A
1 1
DA TA B B
1 8
RE F A
B
RE F B
R S A
R S B
Operating Principles
1
2
3
(CN 7)
4
5
2-19