What's actually going on
077-900 sits in the paper transport chain. The first three digits identify the subsystem and the digits after the dash identify the specific fault within it.
A torn scrap of paper left behind after a jam is the most common cause, often in the registration area or under the transfer belt.
A sensor flag stuck by paper dust will also report paper that is not there.
What to do in the next 48 hours
- 1Write down the full code — 077-900 — before clearing anything, along with the machine's serial number and current meter reading.
- 2Open every door and follow the printed jam-clearance diagram in order — the fragment is usually not where the last jam was.
- 3Check the duplex path and the bypass tray; both are routinely skipped.
- 4Remove and reseat each paper tray, and check under the trays for a sheet pulled off the stack.
- 5Fan the paper stack and confirm the guides are set to the actual paper size.
- 6If the identical code returns within a day of clearing it, stop clearing and log a service call. A code that comes back is a component telling you it is finished.
The honest tradeoffs
- Working around this by printing from another machine is fine short term, but the underlying cause does not resolve itself and usually spreads to other users.
- If the path is genuinely clear and the code persists, a sensor is faulty and needs replacing.
Your next step
- Need help fixing 077-900? Book a technicianSend the code and we route the right parts to the first visit instead of a diagnosis trip.
- Is this machine worth another repair?Free calculator. Age, volume and repair spend against the cost of replacing.
- How our service actually worksResponse times, what a visit covers and who turns up.
Questions people ask next
- How do I clear Xerox error 077-900?
- Work through every jam-access door in the order shown on the machine's diagram, including the duplex unit and bypass tray, and look for a small torn fragment rather than a whole sheet. If the path is clear and the code stays, a paper sensor has failed.
- Do I need a technician for Xerox error 077-900?
- If the path is genuinely clear and the code persists, a sensor is faulty and needs replacing. Send us the code, the model and the serial number and we will tell you honestly whether it is a five-minute fix you can do yourself.
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