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What This Error Means

Error Code 21 on Toshiba printers typically indicates a paper misfeed, jam, or detection issue originating from the main paper tray (Tray 1) or the bypass tray.

Detailed Explanation

Toshiba Error Code 21 is a common alert signifying that the printer has encountered a problem picking up paper from either the primary paper cassette (Tray 1) or the manual bypass tray. This can happen for several reasons, including paper being incorrectly loaded, the wrong paper type or size being selected in the printer settings, or physical obstructions within the paper path. The printer's sensors are designed to detect the presence and movement of paper; when this expected sequence is interrupted, the machine halts operation and displays this code. Often, the root cause is something simple like a bent sheet of paper, an overfilled tray, or debris blocking the feed rollers. Less frequently, it could point to worn-out paper feed rollers that are no longer gripping the paper effectively, or a faulty paper sensor that isn't registering the paper correctly. Addressing this error usually involves a careful inspection of the paper trays and the initial paper path to clear any blockages or correct loading issues.

DIY Troubleshooting Steps

Try these steps before calling a specialist

1
Turn off the printer and unplug it from the power outlet for at least 30 seconds to reset any temporary errors.
2
Carefully open and remove the main paper tray (Tray 1) and the bypass tray. Inspect them for any foreign objects, debris, or crumpled paper.
3
Remove all paper from both trays. Fan the paper stack to separate sheets, then reload it neatly, ensuring it's not overfilled and the paper guides are snug against the edges of the paper without being too tight.
4
Check the paper type and size settings on the printer's control panel. Ensure they accurately match the paper loaded in the trays. Incorrect settings can cause misfeeds.
5
Gently wipe the paper feed rollers (visible when the tray is removed) with a lint-free cloth lightly dampened with water or isopropyl alcohol. Allow them to dry completely before reinserting the tray.
6
Inspect the paper path area immediately above the trays for any small pieces of torn paper or obstructions. Use a flashlight if necessary.
7
Plug the printer back in and turn it on. Attempt to print a test page.
8
If the error persists, try loading a different ream of paper, as sometimes the paper itself can be the issue (e.g., too damp, too slick, or improperly cut).

When to Call a Specialist

If you've meticulously followed all the DIY troubleshooting steps, including cleaning the rollers and verifying paper settings, and the Error Code 21 continues to appear, it's time to contact a professional technician. Persistent misfeeds often indicate worn-out paper feed rollers that require replacement, a malfunctioning paper sensor, or an internal mechanical issue that is beyond user-level repair. Attempting to force paper through or disassemble internal components without proper training can cause further damage.

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TOSHIBA Error Code 21