The Vault
Troubleshooting guide
The same spot or mark repeats at a regular interval down every page — how do I find which part is failing?
Posted by the SuperPrinters team · 7/26/2026
An identical dot, smudge, line segment, or void appears at a fixed, repeating distance on every sheet, always the same color and shape, while the rest of the image is clean. Most often caused by a worn, scratched, or contaminated opc drum/photoreceptor, among other possible causes — a full step-by-step diagnostic and fix follows below.
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