Question:
I'm using an Epson ET-16500 printer, which works fine when printing single-sided. However, it jams whenever I try to print double-sided (duplex). The paper comes halfway out, stops, and doesn't go back into the printer to print the second side. What could be causing this issue?
Answer:
This is a fairly common problem with this model, mainly as the printer ages or is heavily used. When you print duplex, the printer feeds the paper back inside using a mechanism in the rear duplexer assembly. If something goes wrong during this process, the paper can stall halfway out and trigger a jam error.
Possible Causes and Fixes:
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Misaligned Duplexer Gears:
Inside the duplexer unit, there's a set of plastic gears that control the movement of the rollers. If these gears are slightly misaligned—even by one or two teeth—it can prevent the rollers from pulling the paper back in properly. This would explain why the paper exits halfway and then stops. To fix this, the duplexer needs to be removed and the gear alignment checked. You may need to slightly rotate the gear set and realign the teeth so they mesh correctly. -
Worn or Dirty Duplex Roller:
There's a rubber roller inside the duplex unit that grabs the paper and feeds it back in for the second side. Over time, this roller can become smooth, dusty, or coated with ink residue. If it loses grip, the paper won’t feed properly. You can clean the roller using isopropyl alcohol and a lint-free cloth. If the roller is worn down, it may need to be replaced. -
Paper Type and Thickness:
If you’re using thicker paper, glossy stock, or non-standard media, the duplex function may struggle. The duplex path is more complex than the straight single-sided path, so even slightly off-spec paper can jam. Try switching to standard 20–24 lb office paper to test if the problem persists. -
Firmware or Sensor Glitches:
Sometimes the duplex jam may be falsely triggered by a faulty paper sensor. If cleaning and mechanical checks don’t fix the problem, updating the firmware or resetting the printer to factory settings might help rule out software glitches. -
Physical Obstruction or Warped Paper Guides:
Check the duplex path for any small obstructions like a paper clip, label backing, or torn paper pieces. Also, make sure the paper guides are properly set and not pushing too tightly against the paper, which could cause it to skew or jam.
Unfortunately, Epson printers often give generic jam messages like “Paper Jam” or “Jam in Rear Tray” without offering much detail. So, the best approach is physical inspection and trial-and-error with the duplexer unit.
Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. So, we're not able to provide remote troubleshooting, suggestions, or support for printer repairs. We offer an in-person evaluation and repair service via our local diagnostic facility (https://bchtechnologies.com/printer-repair-service). Given the high demand, we operate on a first-come, first-served basis. So, it might take a few weeks before we can get your printer to drop it off. Our services are structured to repair either a whole printer or specific parts, with clear instructions on how to proceed. However, we acknowledge that our rates aren't the most economical. Thus, we highly recommend that you resort to self-help via online research. You can start by checking out YouTube or visiting our YouTube channel's homepage (https://youtube.com/@bchtechnologies). Look for specific videos using the search icon next to "About" on the right-hand side of the menu bar. I receive dozens of queries every day asking about videos for specific topics. Having created videos over the past nine years, it's challenging to remember every single one. Therefore, using YouTube's search function would be most efficient. Plus, YouTube might suggest relevant videos from other channels that could assist you.
Thanks again for reaching out to us. We truly appreciate your patience and your support of BCH Technologies. We hope this helps you get your Epson ET-16500 back into working condition.