Epson Stylus Pro XL Service Manual Page 45

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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 Phase Excitation Drive Frequency
Paper feed 2-2 phase or 2 W1-2 phase 391 or 1600 pps
Pump drive 2-2 phase 300 or 1800 pps
E05A96
(IC2)
41
40
43
42
PFB
PFSTB
CLKA
5
16
2
13
PFA
SLA7041MS
(IC14)
CLKB
STBA
STBB
DATA A
DATA B
6
17
PFVRF
REF A
REF B
PFHLD
RSA
RSB
3
14
9
10
PFCLK
(PB8-PB13)
BE
C
A
A
B
B
1
8
11
18
1
2
3
4
+35 V
5
(CN7)
57
44-48, 39
NPN Tr
(Q25, 26)
Figure 2-22. Paper Feed Motor Drive Circuit Diagram
Stylus Pro XL Operating Principles
REV.-A 2-19
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