EPSON Stylus Pro 7400/7800/9400/9800
Revision B
Operating Principles
Print Mechanism Components
150
2.2.1 Print Mechanism (Print Head)
Stylus Pro 7400/7800/9400/9800 employ a single print head which incorporates both
functions for black and color as the previous model; Stylus Pro 7600/9600.
The print head incorporates a thermistor. According to the temperature around the head
detected by the thermistor, the CPU on the Main Board controls the ink discharge
speed and the amount of ink to be discharged.
Printing method: On-demand ink-jet
Nozzle configuration:
180 nozzles x 8 rows = 1440 nozzles (See
Black:
Stylus Pro 7800/9800 (8-color model): 540 nozzles
(180 nozzles for each of Black1, Black2, and Black3)
Stylus Pro 7400/9400 (4-color model): 360 nozzles
(180 nozzles for each of Black1 and Black2)
Color:
Stylus Pro 7800/9800 (8-color model): 900 nozzles
(180 nozzles for each of cyan, magenta, light cyan, light
magenta and yellow)
Stylus Pro 7400/9400 (4-color model): 1080 nozzles
(180 nozzles for each of cyan1, cyan2, magenta1, magenta2,
yellow1, and yellow2)
Nozzle pitch:
0.141mm (1/180 inch) for each color
Figure 2-1. Nozzle Arrangement
Drive waveform:
The following table shows the outline of the waveforms of the six print modes.
Table 2-2. Relationship between Nozzle Rows and Colors
Nozzle Row
8-Color Mode
4-Color Mode
A
Light gray
Matte black
B
Light magenta
Matte black
C
Light cyan
Magenta
D
Gray
Magenta
E
Photo black/Matte black
Cyan
F
Cyan
Cyan
G
Magenta
Yellow
H
Yellow
Yellow
Table 2-3. Printing Modes (Drive Waveforms)
Waveform Name
Drive Frequency
Print Resolution
CR Speed
VSD1
11.52 KHz
±
7%
H360 x V360
H360 x V720
H720 x V360
320 CPS
VSD1d
11.52 KHz
±
7%
H360 x V360
H360 x V720
H720 x V360
320 CPS
VSD2
8.64 KHz
±
7%
H720 x V360
H720 x V720
240 CPS
VSD2d
8.64 KHz
±
7%
H720 x V360
H720 x V720
240 CPS
VSD3
8.64 KHz
±
7%
H720 x V720
H1440 x V720
240 CPS
VSD3_HR
8.64 KHz
±
7%
H2880 x V1440
240 CPS
A#180
A#179
A#178
B#180
B#179
B#178
C#180
C#179
C#178
D#180
D#179
D#178
E#180
E#179
E#178
F#180
F#179
F#178
G#180
G#179
G#178
H#180
H#179
H#178
A#3
A#2
A#1
B#3
B#2
B#1
C#3
C#2
C#1
D#3
D#2
D#1
E#3
E#2
E#1
F#3
F#2
F#1
G#3
G#2
G#1
H#3
H#2
H#1
41.66mm
31.89mm
0.041mm
1/180inch
0.071mm
1/360inch
7.620mm
216/720inch
7.620mm
216/720inch
7.620mm
216/720inch
2.258mm
64/720inch
2.258mm
64/720inch
2.258mm
64/720inch
2.258mm
64/720inch
Carriage Moving Direction
Paper Fee
d
Dire
ction
Summary of Contents for Stylus Pro 7400
Page 1: ...EPSONStylusPro7400 7800 9400 9800 Large Format Color Inkjet Printer SERVICE MANUAL SEIJ05002 ...
Page 10: ...C H A P T E R 1 PRODUCTDESCRIPTION ...
Page 147: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Page 170: ...C H A P T E R 3 TROUBLESHOOTING ...
Page 207: ...C H A P T E R 4 DISASSEMBLY ASSEMBLY ...
Page 292: ...C H A P T E R 5 ADJUSTMENT ...
Page 373: ...C H A P T E R 6 MAINTENANCE ...
Page 380: ...C H A P T E R 7 APPENDIX ...
Page 385: ...Model PX 7500 7500S 9500 9500S Board C594 Main Sheet 1 of 4 Revison G ...
Page 386: ...Model PX 7500 7500S 9500 9500S Board C594 Main Sheet 2 of 4 Revison F ...
Page 387: ...Model PX 7500 7500S 9500 9500S Board C594 Main Sheet 3 of 4 Revison F ...
Page 388: ...Model PX 7500 7500S 9500 9500S Board C594 Main Sheet 4 of 4 Revison E ...
Page 389: ...Model PX 7500 7500S 9500 9500S Board C594 SUB Sheet 1 Revison C ...
Page 390: ...Model PX 7500 7500S 9500 9500S Board C594 SUB B Sheet 1 Revison E ...
Page 391: ...Model PX 7500 7500S 9500 9500S Board C594 SUB C Sheet 1 Revison D ...
Page 392: ...Model PX 7500 7500S 9500 9500S Board C594 PNL Sheet 1 Revison D ...
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