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ManualsBrandsEpson ManualsPrint & ScanStylus COLOR 480SXU - Ink Jet Printer
41424344454647484950
EPSON Stylus COLOR 480 Revision B
Operating Principles Electrical Circuit Operating Principles 48
2.2.2.3 PF Motor (PF/ PUMP/ ASF Motor) Driver Circuit
The motor driver IC (IC9) on the MAIN board drives PF motor. This product uses 4-
phase 48-pole hybrid type stepping motor and performs constant current bi-polar drive.
CPU (IC1) converts PF motor phase control signal to LB1845 micro step drive form
and outputs to motor driver IC (IC9) LB1845 from port 12, 17. Based on this signal,
IC9 determines the phase mode.
The current value on each phase is determined by CPU (IC1) and outputs from port 13,
14, 15, 16, to driver IC (IC9). Motor driver IC generates motor driver waveform based
on these input signals and controls the motor. If the printer dose not receive any data
from PC for 5 minutes, CPU set the motor drive current to 0 via port 13, 14,15,16 and
the motor drive is turned off to save the power consumption.
Figure 2-20. PF Motor Driver Circuit Block Diagram
2.2.2.4 CR Motor Driver Circuit
The motor driver IC (IC8) on the MAIN board drives PF motor. This product uses 4-
phase 48-pole hybrid type stepping motor and performs constant current bi-polar drive.
CPU (IC1) converts PF motor phase control signal to LB1845 micro step drive form
and outputs to motor driver IC (IC8) LB1845 from port 139, 144. Based on this signal,
IC8 determines the phase mode.
The current value on each phase is determined by CPU (IC1) and outputs from port
140, 141, 142, 143, to driver IC (IC8). Motor driver IC generates motor driver
waveform based on these input signals and controls the motor. If the printer dose not
receive any data from PC for 5 minutes, CPU set the motor drive current to 0 via port
140, 141,142,143 and the motor drive is turned off to save the power consumption.
Figure 2-21. CR Motor Driver Circuit Block Diagram
PFIA2
PFIA3
PFIB2
PFIB3
I0 1
I1 1
I0 2
I1 2
ENABLE1
ENABLE2
PH1
PH2
VREF1
VREF2
RC1
RC2
SEN1
E1
SEN2
E2
16
2
3
27
17
26
22
23
21
20
24
19
25
18
14
13
15
16
12
17
7
OUT1A
OUT1B
OUT2A
OUT2B
7
6
9
8
E01A14NA
(IC 1 )
LB 1845
(IC 9 )
Rotor
1
3
2
4
A
A/
B
B/
CN3
13
12
PFPHAA
PFPHAB
P F V 2
CRIA2
CRIA3
CRIB2
CRIB3
I0 1
I1 1
I0 2
I1 2
ENABLE1
ENABLE2
PH1
PH2
VREF1
VREF2
RC1
RC2
SEN1
E1
SEN2
E2
16
2
3
27
17
26
22
23
21
20
24
19
25
18
141
140
142
143
139
144
3
OUT1A
OUT1B
OUT2A
OUT2B
7
6
9
8
E01A 14N A
(IC 1 )
LB 1845
(IC 8 )
Rotor
1
3
2
4
A
A/
B
B/
CN2
13
12
CRPHAA
CRPHAB
M T V 2