Solving print quality problems

Dirt inside of the printer or improper paper loading may reduce print quality. See the table below to troubleshoot problems.

Condition	Suggested solutions

Light or faded	If a vertical white streak or faded area appears
print	on the page:

AaBbCc	•	The toner supply is low. You may be able to
AaBbCc		temporarily extend the toner cartridge life. See
AaBbCc		page 8.4. If this does not improve print quality,
AaBbCc	•	install a new toner cartridge.
AaBbCc	•	The paper may not meet paper specifications
AaBbCc		(for example, the paper is too moist or too
AaBbCc		(for example, the paper is too moist or too
AaBbCc		rough). See page 5.3.
		rough). See page 5.3.
	•	If the entire page is light, the print resolution
		setting is too light or toner save mode is on.
		Adjust the print resolution and toner save
		mode in the printer properties. See the
		Software Section.
	•	If the entire page is faded with "Toner Low
		Replace Toner" message on LCD,
		set "CLR Empty Msg." to "On" referring to
		page 8.7. In this case, you can keep printing
		but the quality cannot be guaranteed, and the
		product support is no longer provided.
	•	A combination of faded or smeared defects
		may indicate that the printer needs cleaning.
		See page 8.1.
	•	The surface of LSU may be dirty. Clean the
		LSU. See page 8.2.

Toner spots	• The paper may not meet specifications (for
AaBbCc	example, the paper is too moist or too rough).
AaBbCc	See page 5.3.
AaBbCc	• The transfer roller or paper path may be dirty.
AaBbCc	See page 8.1.
AaBbCc
AaBbCc
AaBbCc

Condition		Suggested solutions
Dropouts	If generally rounded, faded areas occur
	randomly on the page:
AaBbCc	•	A single sheet of paper may be defective. Try
AaBbCc		reprinting the job.
AaBbCc	•	The moisture content of the paper is uneven
AaBbCc		or the paper has moist spots on its surface.
AaBbCc		Try a different brand of paper. See page 5.3.
AaBbCc		Try a different brand of paper. See page 5.3.
AaBbCc	•	The paper lot is bad. The manufacturing
		processes can cause some areas to reject
		toner. Try a different kind or brand of paper.

•The toner cartridge may be defective. See “Vertical repetitive defects” on the next page.

•If these steps do not correct the problems, contact a service representative.

Vertical lines

If black vertical streaks appear on the page:

AaBbCc	• The drum inside the toner cartridge has
AaBbCc	probably been scratched. Install a new toner
AaBbCc	cartridge. See page 8.5.
AaBbCc	If white vertical streaks appear on the page:
AaBbCc	• The surface of the LSU part inside the printer
AaBbCc	may be dirty. Clean the LSU. See page 8.2.

Gray	If the amount of background shading becomes
background	unacceptable, the procedures below may fix the
	problem.

	AaBbCc	• Change to lighter weight pages. See page 5.3.
	AaBbCc	• Check the printer’s environment; very dry (low
	AaBbCc	humidity) or high humidity (higher than 80%
	AaBbCc	RH) conditions can increase the amount of
	AaBbCc	background shading.
	AaBbCc	• Remove the old toner cartridge and install a
		• Remove the old toner cartridge and install a
		new one. See page 8.5.

Toner smear	•	Clean the inside of the printer. See page 8.1.
	•	Check the type and quality. See page 5.2.
	•	Remove the toner cartridge and install a new
		one. See page 8.5.

9.11 <Troubleshooting>

ML-4550 specifications

The Sharp ML-4550 is a high-performance multifunction laser printer designed specifically for the demands of modern office environments. Known for its robustness and versatility, this model is engineered to streamline various document handling processes while maintaining exceptional print quality.

One of the standout features of the Sharp ML-4550 is its impressive print speed. Capable of delivering up to 45 pages per minute, it enables businesses to handle large print volumes efficiently. The first-page-out time is remarkably quick, ensuring minimal waiting time for users. Coupled with a maximum print resolution of 1200 x 1200 dpi, users can expect crisp and clear textual clarity, as well as stunning graphics.

Another significant characteristic of the ML-4550 is its multi-functional capability. In addition to standard printing, it offers advanced features such as scanning, copying, and faxing. This versatility makes it an all-in-one solution that can help reduce the footprint of office equipment while enhancing productivity. Large-scale offices will appreciate the high-capacity paper trays, supporting up to 1,500 sheets, thereby minimizing the need for frequent paper replenishment.

The technology behind the Sharp ML-4550 includes a user-friendly LCD control panel that simplifies navigation through various functions. It is compatible with various operating systems, ensuring broad accessibility across different user platforms. Moreover, its support for mobile printing technologies, including Apple AirPrint and Google Cloud Print, allows users to print directly from their smart devices, providing a degree of flexibility highly valued in today’s fast-paced work environments.

Another advantage of the ML-4550 is its compatibility with Sharp’s innovative software solutions. This includes advanced security features, making it ideal for businesses that prioritize secure document handling. Its capability to integrate with Sharp’s Document Systems enhances overall workflow efficiency, ensuring that users have access to tools that support collaborative efforts.

In summary, the Sharp ML-4550 stands out as a well-rounded multifunction printer that delivers speed, quality, and versatility. Its advanced features and robust technology align with the needs of a modern office, making it a solid investment for businesses focused on improving productivity and document management efficiency.

Sharp ML-4550 manual Solving print quality problems

Models: ML-4550

Solving print quality problems

Software Section.

Toner smear

ML-4550 specifications