Brother MFC 9330CDW
I have had my printer for over a year and it has been printing fine. But all of a sudden the paper on the left side is being damaged. It looks like its possible being over heated by a roller or something. Its leaving round crease style marks about 50mm wide starting about 20mm from paper edge

Experienced technical support provide their insights in answering this question :
The only thing in the printer where the paper can get wrinkled is the fuser assembly at the back. It has a heat roller and a rubber pressure roller that the paper goes through and the toner gets melted into the paper. Sometimes paper wraps around the roller, other times the rubber pressure roller gets damaged. It will probably need to be replaced.

How to Identify and Fix Common printer Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced technical support :

Heat and pressure bond the toner to the paper in the fuser. If the outer coating is coming apart then you will have parts of the print that is not getting properly fused and will lead to blurred or smeared print. 2. Creased or wrinkled paper – Just like above, the outer coating of the rollers are coming apart.
Make sure the correct margins have been set in the Printer Setting Tool (refer to the Online User`s Guide) or your application. Adjust the left margin as needed. Make sure the application, the printer, and the printer driver have been set to match the paper size of the paper that is loaded in the printer.
Printer Faults – Faded One Side of a Print. Fading at a margin generally suggests: an imbalance of the toner, all of it is unshiftably at one side of a cartridge. The toner agitators or stirrers should move the problem but don`t invariably succeed.
Bits of paper might be obstructing the paper path and need to be cleared. Unsupported paper types and sizes might catch and tear in the printer mechanism while printing. Paper pushed too far into the input tray when it is loaded, might feed into the printer incorrectly, causing the paper to tear.
Curl occurs when in-plane layers within a sheet expand or contract at different rates. Different expansion/contraction rates are caused by differences in fiber orientation, difference in composition (fines, fillers, coatings), draws, drying conditions and differences in sheet moistures.
Your copies may be cut off if the paper is loaded incorrectly in the Automatic Document Feeder (ADF) or paper tray, or if the paper size setting is not programmed correctly.
The zoom percentage that the document is set to may cause characters to have the top or bottom portion of the screen font cut off. You can adjust the zoom percentage from 75 percent to 100 percent in most cases to correct this visually.
Airborne particles within an office environment are a combination of particles generated from various sources, included are laser printers which emit paper fibres, organic vapours and inorganic gases. Research has shown that laser printers emit nanoparticles of substances, which could increase the effects of exposure.
IMPORTANT: Do not lay the printer on its side or back. Used ink is accumulated in the printer and can leak if the printer is not laid down properly.
Common factors include driver problems, software issues, hardware failures and overuse.
Does Paper Affect Print Quality? The answer is a resounding yes! The type of paper you choose to print on plays a significant role in determining the final quality of the printed material. Not all paper is created equal, and this variety is beneficial as it allows for tailored printing experiences.
This issue is usually caused by foreign material inside the machine (paper dust, glue from labels or envelopes, paper clips, staples, etc.) sticking to or damaging the surface of the drum. This is typically resolved by cleaning and/or replacing the drum unit.
Paper is quite hygroscopic, so ambient humidity and changes in temperature can influence its weight, thickness and rigidity. This can cause a variety of issues in moist environments, especially when printers are involved.
This issue is usually caused by foreign material inside the machine (paper dust, glue from labels or envelopes, paper clips, staples, etc.) sticking to or damaging the surface of the drum. This is typically resolved by cleaning and/or replacing the drum unit.
Wet your paper with a moist sponge or a piece of cloth. As an alternative, dip the paper in water and place it on your table. The water makes the paper stick to your working surface.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

My printer feeds through one piece of paper all the way and then a half piece of paper and stops. I pull out the paper to stop the paper jam and then it prints but sounds rough. After printing, it doesn't feed the paper all the way through.
ANSWER : And the first 2 sheets, the full and half sheet that go through first, are blank.

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Brother MFC 9330CDW

Paper is being damaged on left side
ANSWER : The only thing in the printer where the paper can get wrinkled is the fuser assembly at the back. It has a heat roller and a rubber pressure roller that the paper goes through and the toner gets melted into the paper. Sometimes paper wraps around the roller, other times the rubber pressure roller gets damaged. It will probably need to be replaced.

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Brother MFC 9330CDW

paper will not load right, only on the left side then jams. Worked fine this am, 2 hours later this happens
ANSWER : There is something in the paper path on the right side blocking it. Could be a torn scrap of paper, a dead bug, etc. Use a piece of file folder to push it out.

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Brother MFC 9330CDW

Rear Paper Feed Blocked On Left Side?
ANSWER : Most times it is something you can’t see, like a small torn scrap of paper. What you can try is to shove a file folder down the path the paper takes. That will push out any offending scrap without having to take the printer apart.

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Brother MFC 9330CDW

Paper Jam error but no paper jam
ANSWER : Obviously you didn’t get all the paper cleared out. There is a small scrap in the paper path causing the jam when the paper hits it. You can try clearing it out by inserting something stiff like a piece of file folder from the back of the printer into the paper path and pushing the offending piece out that way.

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Brother MFC 9330CDW

Paper jam in tray 2 (but no paper pulled from tray) also M476DN models
ANSWER : Isopropyl alcohol is not recommended for rubber rollers. It dries out the rubber and hasten it’s cracking and breaking. It will do nothing to restore the grip. Those rollers are really hard to replace. It would be easy if that dumbass secondary menu really worked. None of the techs I’ve spoke to ever got into it. Everyone I know sends a print job and listens for the roller to rotate into position where you can pull it off.

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Brother MFC 9330CDW

paper drive wont accept paper
ANSWER : There is probably a small scrap of paper stuck at the left edge of the paper path. The paper hits it and skews to the left. The smaller size bypasses it. You need to shove something stiff, like a piece of file folder, down the paper path and attempt to dislodge it.

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Brother MFC 9330CDW

Error message to load paper and push OK, but not out of paper
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Brother MFC 9330CDW