EPSON Stylus COLOR 580
Revision A
Operating Principles
Electrical Circuit Operating Principles
46
selector IC determines the nozzles to be actuated. The selected nozzles are driven by
the drive waveforms generated by the common driver. See Figure 2-19 for the
printhead driver circuit block diagram.
Figure 2-19. Printhead Driver Circuit
o
Head common driver circuit
The reference head drive waveform is generated in the common driver (IC7) based
on the following 11 signal lines output from the CPU (IC1); A0-A3, CLK1, CLK2,
FLOOR, RST, DATA, DCLK, and E.
Based on the DATA signal output from the CPU (IC1), the original data for the
head drive waveform is written in the memory in the common driver (IC7).
The addresses for the written data are determined by the A0 - A3 signals, and, of
among, data used to determine the waveform angles is selected and appropriate
head driver waveform is generated. Generated head drive waveform is transferred
to nozzle selector IC on the head driver board and applied to the nozzle PZT
specified by nozzle selector IC.
o
Head nozzle selector circuit
Printing data are allocated to the two rows, the number of the head nozzle rows,
and converted into serial data by the CPU (IC1). Then the converted data is
transferred to the nozzle selector IC through the two signal lines (SI0 to SI2).
Data transmission from the CPU to the nozzle selector synchronizes with the SCK
clock signal and the LAT signal. Referring to the transferred data, nozzles to be
activated are selected, and the PZTs of the selected nozzles are driven by the drive
waveform output from the head common driver.
H e a d D r i v e
P u l s e
A O
A 1
A 2
A 3
C L K 1
C L K 2
F L O O R
R S T
D A T A
D C L K
E
V C C 4 5
V C C 4 5 _ 2
N P N B
P N P B
F B
I C 7
C o m m o m
D r i v e r I C
N o z z l e S e l e c o r I C
I R 2 C 9 6 F
F 1
+ 4 2 V
+ 5 V
L A T
S I 1
S I 2
S C K
N C H G
C H
S P
T H M
V D D
V H V
C O M
G N D 2
G N D
G N D
G N D
G N D
1 3
1 6
1 5
3
5
7
9
1 4
4
1 2
1 0
6
5
2
1 1
1
C N 4
H C H
H S P
A N 0
H S 0 1
H S 0 2
H C L K
H N C H G
H W A 0
H W A 1
H W A 2
H W A 3
H W C L K 1
H W C L K 2
H W F L R
H W R S T
H W S D A T A
H W S C L K
H W S L A T
I C 1
E 0 1 A 1 4 N A
H W L A T
2 2
2 3
2 0
1 8
1 6
2 8
2 7
2 6
2 5
4 7
4 6
4 5
4 3
4 0
3 9
3 8
3 7
4 8
4 9
4 1
3
4
5
6
2 9
3 0
1
2 5
3 0
2 8
2 7
2 6
2 4
2 9
2 2
IC1
E01A19NA
Summary of Contents for STYLUS COLOR 580
Page 1: ...EPSON STYLUSCOLOR580 Color Inkjet Printer SEIJ00013 SERVICE MANUAL ...
Page 6: ...Revision Status Revision Issued Date Description Rev A August 31 2000 First Release ...
Page 9: ...C H A P T E R PRODUCTDESCRIPTION ...
Page 29: ...C H A P T E R OPERATINGPRINCIPLES ...
Page 50: ...C H A P T E R TROUBLESHOOTING ...
Page 66: ...C H A P T E R DISASSEMBLYANDASSEMBLY ...
Page 99: ...C H A P T E R ADJUSTMENT ...
Page 122: ...C H A P T E R MAINTENANCE ...
Page 129: ...C H A P T E R APPENDIX ...
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