Printing Mechanism (Print Head); Relationships Of Colors To Nozzles By Mode; Relationship Between Nozzle Rows And Colors - Epson Stylus Pro 4400 Service Manual

EPSON Stylus Pro 4400/4450/4800/4880/4880C

2.2.1 Printing Mechanism (Print Head)

The printing method uses the unique EPSON MACH method of previous
models.
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
(Refer to
Table 2-2. Relationships of Colors to Nozzles by Mode
Mode Model
Stylus Pro 4400
• Matte Black x 2
Stylus Pro 4450
• Cyan x 2
4 Colors
• Magenta x 2
• Yellow x 2
Stylus Pro 4800
• Matte Black /
Photo Black
• Light Black
• Cyan
• Magenta
8 Colors
Stylus Pro 4880 • Matte Black /
Stylus Pro 4880C Photo Black
• Light Black
• Cyan
• Vivid Magenta
Operating Principles
Figure 2-1 for nozzle arrangement.)
Number of
Color Nozzles for
Each Color
360
• Yellow
• Light Cyan
180
• Light Magenta
• Light Light Black
• Yellow
• Light Cyan
180
• Vivid Light
Magenta
• Light Light Black
Printer Mechanism Components
Nozzle pitch : 0.141mm (1/180 inch) for each color
Table 2-3. Relationship between Nozzle Rows and Colors
8 Color Mode
Nozzle Row
Stylus Pro 4800
A Light Light Black
B Light Magenta
C Light Cyan
D Light Black
E Photo Black /
Matte Black
F Cyan
G Magenta
H Yellow
A row B row C row D row E row
Carriage Moving Direction
Figure 2-1. Nozzle Arrangement
Revision C
4 Color Mode
Stylus Pro 4880 Stylus Pro 4400
Stylus Pro 4800C Stylus Pro 4450
Light Light Black Matte Black
Vivid Light Magenta Matte Black
Light Cyan Magenta
Light Black Magenta
Photo Black / Cyan
Matte Black
Cyan Cyan
Vivid Magenta Yellow
Yellow Yellow
F row G row H row
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