Epson L1800 Paper and Ink Lights Flashing When Carriage Moves to Capping Station: Causes and Fixes

Question

I'm having trouble with my Epson L1800. When the carriage moves toward the capping station, the printer triggers both the paper and ink lights and stops. I replaced the capping station because I thought it was the problem, and the printer worked briefly. However, the next day it made a loud noise, locked the carriage again, and showed the same error lights.

I manually turned the white gear underneath the capping station to release the carriage, and now the carriage moves freely by hand. But when I power on the printer, the carriage moves toward the station and the printer errors out again-this time without the loud noise. The wiper blade and the white mechanism toward the left rear both appear to be down, and the carriage can pass through manually. Could the station be out of its reset position? What should I check next?

Answer

Based on your description, the most likely issue is that the capping station is out of synchronization with the printer's mechanism, or the capping station motor does not have enough torque to complete its cycle. When this happens, the white locking lever in the capping assembly can block the printhead carriage when it moves toward the left side.

Why the Paper and Ink Lights Flash

On the Epson L1800, flashing paper and ink lights together typically indicate a mechanical obstruction or carriage movement error. This occurs when the printer detects that the carriage cannot complete its travel or that a component inside the maintenance assembly is not in the expected position.

Since the error appears specifically when the carriage approaches the capping station, the problem almost always relates to one of the following:

• Capping station gear timing is misaligned

• Maintenance unit gears are partially engaged

• The capping station motor lacks torque due to resistance

• A gear inside the pump assembly is skipping

• The white locking lever remains slightly raised

When the printer starts up, it performs a maintenance cycle where the capping station moves up and down and the pump rotates. If the gears are even slightly out of sync, the mechanism may jam and cause the printer to shut down with the flashing lights.

Why the Loud Sound Happened Earlier

The loud noise you heard previously was likely gear skipping inside the capping station assembly. This typically occurs when:

• The gear timing is incorrect.

• The capping station was installed while the internal gears were not in their home position.

• The pump mechanism encountered resistance.

Once gears skip, the system can become permanently out of alignment, which explains why the printer briefly worked and then failed again the next day.

A Simple Sync Attempt You Can Try

One quick method to help the system re-synchronize is the following:

1. Move the carriage to the middle of the rail manually.

2. Turn the printer on while the carriage is in the center.

3. Allow the printer to initialize.

Starting the carriage away from the capping station sometimes gives the maintenance assembly extra time to rotate and re-sync its gears before the carriage arrives.

This does not always solve the issue, but it's a simple step worth trying.

Screeching or Grinding Sound References

If you hear unusual sounds during startup, these videos may help explain the behavior and potential fixes:

• Fixing Screeching Noise in Epson Printers
  https://youtu.be/MjArYM-QnfU

• Troubleshooting Maintenance Unit Grinding Sounds
  https://youtu.be/TNOG_1TtN6g

Helpful Capping Station Repair Videos

If the issue persists, these tutorials cover several aspects of capping station repair and maintenance:

Removing and Installing the Capping Station
This walkthrough demonstrates how to remove and reinstall the capping station.
https://youtu.be/_cZEkmgIZYc

Unclogging the Capping Station
Shows how to clean the cap and pump assembly if it becomes blocked.
https://youtu.be/WbY_6O1-w2c

Capping Station Maintenance
Regular maintenance steps that help prevent mechanical issues.
https://youtu.be/5yjq3ZN0qv8

Repairing the Capping Station
Troubleshooting and repairing common mechanical failures.
https://youtu.be/5UC2IMu9V90

Rewiring or Reconnecting Capping Station Tubes
Helpful if the pump tubes are clogged or disconnected.
https://youtu.be/J9im3s8UJfo

If you need an extremely detailed breakdown, I also created a full teardown video that shows how to disassemble and reassemble the entire capping station gear system step by step. You can find it here:

Capping Station Assembly & Disassembly Guide
https://bchtechnologies.com/products/video-capping-station-assemble-disassemble-guide-for-l1800-1390-artisan-1430-and-1400

Addressing printer issues can sometimes be complicated due to the hands-on nature of mechanical repairs. Because of this, we're unfortunately not able to provide remote troubleshooting or step-by-step repair guidance. However, we do offer in-person diagnostic and repair services through our local evaluation facility: BCH Technologies Printer Repair Service (https://bchtechnologies.com/printer-repair-service). Due to high demand, repairs are handled on a first-come, first-served basis, and it may take several weeks before we can schedule a drop-off. Our services can address either complete printers or individual components, with clear instructions provided during the process.

That said, we understand that professional repair may not always be the most economical option. In many cases, self-help research can be very effective. We recommend starting with YouTube-especially the BCH Technologies YouTube channel (https://youtube.com/@bchtechnologies). On the channel homepage, you can use the search icon next to the "About" tab to find videos about specific printer issues. I receive dozens of questions every day asking if a video exists on a certain topic. Since we've produced hundreds of repair videos over the past nine years, searching directly on YouTube is often the fastest way to locate the right guide. YouTube may also recommend helpful tutorials from other creators that could solve your issue.

Thanks again for reaching out and for supporting BCH Technologies. We truly appreciate your engagement and wish you the best of luck getting your L1800 back up and running.