How to Fix HP Photosmart 7520 Error Code 0x610000f6 (Carriage Jam & Encoder Strip Troubleshooting)

Question:

My HP Photosmart 7520 shows error code 0x610000f6. I've cleared a paper jam and cleaned the carriage, but the error persists, and the cartridge continues to move to the wrong side. What else should I try?

Understanding Error Code 0x610000f6 on HP Photosmart 7520

This specific error is classified as a “Carriage Jam” or “Mechanical Stall” code. While paper jams or obstructions can trigger it, it's often caused by an issue with the carriage movement system, particularly the clear plastic encoder strip that guides the printhead.

If the encoder strip is dirty or misread, it can confuse the printer’s sensors about the carriage position, causing it to slam to one side or stop erratically.

Troubleshooting Steps to Fix Error 0x610000f6

1. Inspect the Carriage Path Again

• Even if you’ve removed the paper jam, double-check the entire carriage path, including the far-left and far-right ends where paper scraps may hide.

• Use a flashlight to inspect the area around the carriage belt and rod for bits of paper or dried ink buildup.

2. Clean the Clear Encoder Strip

• The encoder strip is a thin, transparent plastic ribbon running horizontally behind the carriage.

• Over time, it may collect ink mist, dust, or oil from your hands, causing positioning errors.

• To clean:

  • Please turn off the printer and unplug it.

  • Use a lint-free cloth or coffee filter moistened with distilled water or isopropyl alcohol.

  • Gently wipe the strip left to right, being careful not to pull or twist it.

  • Dry the strip with a clean section of the cloth before turning the printer back on.

3. Power Cycle the Printer

• After cleaning, allow the printer to sit unplugged for about 5 minutes.

• Reconnect and turn it on again to see if the error clears.

4. Perform a Manual Carriage Movement Test

• With the power still off, manually slide the carriage across the rail to check for any resistance.

• If it moves smoothly, the mechanical stall is likely resolved.

Additional Notes:

• Do not lubricate the carriage rod unless explicitly instructed by HP, as excess lubrication can cause the encoder strip to become smeared.

• Avoid touching the encoder strip with bare fingers—oil can interfere with sensor readings.

• If the problem persists even after cleaning, the carriage sensor or logic board may need professional service.

For reference, we’ve also documented a similar error for another model in our blog post:
Resolving HP OfficeJet 6500A Error Code 0x610000f6
(https://bchtechnologies.com/blogs/blog/resolving-hp-officejet-6500a-error-code-0x610000f6)

In-Person Help Option

Tackling printer errors like this can be frustrating due to their hands-on and model-specific nature. For this reason, we don’t offer remote repair services. However, you can bring your printer to our diagnostic center for in-person evaluation and repair (https://bchtechnologies.com/printer-repair-service).

Please note:

• We operate on a first-come, first-served basis.

• Turnaround time may take a few weeks due to high demand.

• We can repair the whole printer or specific components.

• Our service may not be the cheapest option, so we encourage DIY troubleshooting when possible.

If you're going the DIY route, start by visiting our YouTube homepage (https://youtube.com/@bchtechnologies).
Use the search icon next to “About” to find videos by topic or model. This is often faster than waiting for email replies, and YouTube may even recommend similar guides from other creators.

Thanks again for reaching out to us and for being part of the BCH community. We hope this helps get your HP Photosmart 7520 back in working condition!