Sharp MX-7500N Quick Manual page 7

Superb, Stable Image Quality
Breathtaking Image Quality
Wide Colour Gamut
The MX-7500N/6500N was developed to provide high image quality
approaching that of commercial offset printers. With Sharp having
reinforced all elements related to image processing—including the toner
and colour profiles—the MX-7500N/6500N boasts a colour gamut that is
almost identical to that of offset printers.
Colour Gamut Chart
Yellow
Green
Typical offset prints
Cyan
High-Resolution Output
The MX-7500N/6500N employs 8-bit image processing to deliver
razor-sharp 1,200 x 1,200 dpi printing—without sacrificing output
speed. Digital smoothing technology enhances the print and copy
resolution to the equivalent of 9,600 x 600 dpi for smooth reproduction
of fine lines. Fine-grained photographs, detailed illustrations and graphs,
and small text come out crisp and clear.
Advanced Technologies to Maintain High Image Quality
Developer Refresh System
In order to achieve consistent image
quality from first page to last, Sharp
developed the Developer Refresh
System. In this system, toner and
carrier are delivered to the developing
unit at the same time. By discharging
old developer little by little and
continuously replacing it with new
developer, this system prevents
developer deterioration, ensuring
stable print quality over the long term.
Auto Process Control
To maintain a consistently high image quality during large-volume print
jobs, the MX-7500N/6500N employs an enhanced periodic colour
calibration system. Image density sensors monitor
image consistency to minimise colour variance
between pages. As an added advantage,
the MFP makes the necessary colour
adjustments without stopping
the print job, ensuring
time-efficient printing.
b*
MX-7500N/6500N
Red
a*
0
Magenta
Blue
a*: Colour channel from Green to Magenta
b*: Colour channel from Blue to Yellow
Toner cartridge
Toner (magenta)
Carrier
(Conceptual image)
Discharged
Sensor
(Conceptual image)
Mycrostoner-HG3
Third-generation Mycrostoner-HG3 (High Grade) expands the colour
reproducibility range for a more natural rendering of clear blue skies,
emerald green oceans, and other colour images. And the smaller particle
size of the toner and the carrier allows for reduced graininess and clear
reproduction of fine lines, fine text, and halftone colours.
Dot Screening Technique
In addition to conventional line screening, the MX-7500N/6500N
employs the dot screening technique—typically found on offset
printers—for colour and greyscale printing. Thanks to dot screening, the
MX-7500N/6500N can emulate the high-quality printing of commercial
offset printers, even when performing on-demand printing.
Image Dot screen (high)
Adobe PostScript 3
® ® ™
The MX-7500N/6500N supports genuine Adobe PostScript 3 for better
graphics handling. Complex colour graphics can be printed out in a short
time with minimal error, and multiple colour spaces such as RGB, CMYK,
and Lab can be used.
Precise Colour Registration
To meet the demands for high image quality, accurate colour
registration, and stable output, the MX-7500N/6500N employs functions
that automatically make the right adjustments at the right time without
sacrificing print speed. These functions enable the MFP to deliver highly
precise printing and stable colour quality, so that a consistently high level
of print quality and productivity is maintained over the long run, from
first page to last.
• When printing large numbers of multi-page documents, the
MX-7500N/6500N automatically adjusts the print position so that each
of the CMYK colours is printed at the correct registration.
• The MX-7500N/6500N's registration sensors precisely detect the
position of registration patches printed on the transfer belt. These
measurements are then used to make minute adjustments—when
necessary—of the print position for each CMYK colour.
• The temperature inside the machine is measured by sensors in key
areas of the MFP, such as the LSU (laser scanning unit) and
paper-transfer section. The MFP uses this information to make
automatic adjustments before print quality can be affected by
temperature changes.
• For even greater precision, a sensor detects any skewing of the laser
beam that goes from the LSU to the photosensitive drum, so that the
MFP can make automatic adjustments to eliminate such skewing.
Line screen
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