You send a one-page invoice to the printer. It comes out with a blank sheet tucked underneath. The next invoice prints normally, but halfway through the batch, two sheets get caught together and the printer stops. Before you reprint the whole job, check one detail. Are two sheets leaving the same tray together? If they are, the place to start is the paper feed.
Start with the paper tray
Remove the paper from the affected tray and look at the leading edges. A bent corner, a curled stack or sheets that cling together can interfere with feeding. This is especially worth checking if the problem started just after someone refilled the tray.
Try a small stack of fresh, flat paper in the size selected for the tray and of a weight your printer supports. Tap the edges square, load the stack below the tray’s fill mark and slide the guides until they just touch the paper. If the stack bows in the middle, the guides are too tight.
Now print five one-page jobs from that tray and watch the sheets as they emerge. If each job produces a single sheet, set the original paper aside. If two sheets still travel together, try the same fresh paper in a second tray, if your machine has one that supports the same size. When the fault follows one tray, tell the technician which tray it is. That detail helps narrow down the inspection.
What a printer technician checks
Inside the feeder, the pickup roller draws paper forward. Depending on the model, a separation pad or roller holds the next sheet back. When that surface wears smooth, a second sheet can slip through with the first. The result can be an extra blank sheet, a crooked print or a jam before the invoice reaches the output tray.
A technician can inspect the affected tray, its guides and its feed components, then repeat the test with the same paper. If you report the fault, describe exactly what you saw. “Tray 2 pulls two sheets together, but Tray 1 prints normally” gives the technician a better starting point than “the printer keeps jamming.”
A different clue when scanning
If printed invoices come out correctly but a page disappears from a scanned contract, watch the originals going through the top document feeder. Two originals can pass through together, leaving one page missing from the PDF. In that case, tell the technician that the problem occurs during scanning and identify the missing page. The top feeder and the print paper tray are separate parts of the machine.
Printer repair in Dubai and Sharjah
ZD Computer Trading LLC provides onsite printer diagnosis and repair for offices in Dubai and Sharjah. To request a visit, send us your printer model, your office location and a short video showing the affected tray as it feeds paper. If the fault only happens with letterhead, labels or a particular paper size, mention that too so our technician can test the job that is causing the interruption.

