Horizontal lines appearing at the top of print

If you are experiencing horizontal lines on your printed documents when using the Sharp AR M355N printer, there are a few steps you can take to troubleshoot and fix the issue:

1. Clean the printer head: Use a clean, dry, and lint-free cloth to gently wipe the printer head. The printer head is the part of the printer that contacts the paper, so if it is dirty or clogged with ink, it can cause horizontal lines. Be careful not to apply too much pressure or touch the printer head with your hands.
2. Check the toner cartridge: If the toner cartridge is low or empty, it can cause horizontal lines. Replace the toner cartridge if necessary and check if the problem is resolved.
3. Check the paper: The paper used in the printer may be the cause of the horizontal lines. Ensure that the paper is compatible with the printer specifications, and is not damaged or folded. Try printing on different paper to see if the problem persists.
4. Run the printer's cleaning cycle: The printer has a built-in cleaning cycle that can help remove any ink buildup or debris that may be causing the horizontal lines. Refer to the user manual for instructions on how to run the cleaning cycle.
5. Check the printer settings: Ensure that the printer settings are correctly configured for the document you want to print. For example, if you are printing a high-resolution image, make sure that the printer's resolution settings are set to match the image's resolution.

If none of these steps resolves the issue, you may need to contact Sharp support or a qualified technician for further assistance. They can diagnose the problem and determine if there are any hardware issues that need to be addressed.

When you use the flatbed the copy is perfect because the ccd sensor is under the glass cover and obviously is free form dust/ dirt.
On the other hand if you use the feeder the ccd sensor is located in between the roller assembly (not sure exactly for this model).
This means that the page is scanned by the ccd in the feeder, any dirt on the ccd will appear as a black line. I assume that you are feeding papers from the side and not from the top that is why you get a horizontal line.

A quick test to see if the ccd sensor is dirty is to feed the paper from the top side to the feeder. If you get a vertical line it is a proof that your ccd sensor needs to be cleaned.
The worst case is that the sensor in the feeder assembly has a tiny spot that is damaged and it is causing the black line.
So , first try the test, then open the feeder assembly, locate the ccd and clean it. Hope that this helps.

If this a P2035 printer using a toner cart with a drum in it. The drum has been exposed to light or has a smudge on it. take the cart out and look at the drum. This is a round light blue tube located at the bottom of the cart. It is the drum because it is the only thing in the printer that will print a defect three times on the paper. You could also print about 0 black sheets of paper through the printer and it will go away. This is because the drum coating is in layers like an onion. You must get rid of the exposed layer to get to on that has not been exposed to light.

try to change the color ink. horizontal banding (the pink or other color lines appearing means horizontal banding) when there is a problem on one of the heating element of the printer head. since almost all canon printers have head built in the inks, replacing the faulty ink will solve the problem. if not then the controller of printhead on the carriage and mainboard needs to be checked.

Check the wondow where the paper passes to be scanned. You will probably find some debris or white out stuck on the glass. That is usually the cause of vertical lines on sent faxes.

Clean the nozzles, align the print heads, turn it off for about an hour. You may need to do this twice, but it works for me.

try moving the small blue slider on top of the drum cartridge side to side 10 times.

Horizontal lines usually indicate a toner cartridge that is not cleaning properly.

A. If the distance between defects is 38 mm (1.5 inches), 47 mm (1.85 inches), or 94 mm (3.7 inches), the print cartridge might need to be replaced.
B. Clean the printer.

1. Clean the inside of the printer and run a cleaning page to clean the fuser.

Over time, particles of toner and paper accumulate inside the printer. This can cause print-quality problems during printing. Cleaning the printer eliminates or reduces these problems.

To clean the inside of the printer
1. Turn the printer off and unplug the power cord.
2. Open the top cover.
3. Remove the print cartridge.
4. With a dry, lint-free cloth, wipe any residue from the paper path area and the print cartridge
cavity.
5. Reinstall the print cartridge and close the top cover.
6. Plug in the power cable and turn the printer on.

Cleaning the fuser:

Run the printer cleaning page to keep the fuser free of toner and paper particles that can sometimes accumulate. Accumulation of toner and particles can cause specks to appear on the front or back side of your print jobs. To ensure optimum print quality, HP recommends that you use the cleaning page every time that you
replace the print cartridge or on an automatic interval that you can set up. The cleaning procedure takes about 2.5 minutes to complete. A CLEANING message appears on the printer control panel display while the cleaning is taking place.
To run the cleaning page:

In order for the cleaning page to work correctly, print the page on copier-grade paper (not bond, heavy, or rough paper).
1. If your printer model includes a duplexer, open the rear output bin.
2. Press Menu to open the menus.
3. Use (Up button) or (Down button) to scroll to CONFIGURE DEVICE, and then press (Select button).
4. Use (Up button) or (Down button) to scroll to PRINT QUALITY, and then press (Select button).
5. Use (Up button) or (Down button) to scroll to CREATE CLEANING PAGE, and then press (Select button).
6. Follow the instructions on the cleaning page to complete the cleaning process.
7. If your printer model includes a duplexer, close the rear output bin.

If this helps resolve the problem, please post a reply. Binary Bob

Check for scratches on the drum surface. If you have ran a lot of copies on there, its a good time to get it serviced. It could be the cleaning blade on the drum as well.

Is there any debris under the printhead nozzle plate?