Troubleshooting Printhead and Mainboard Issues in L1800 Printers

Question:

I have a question about my  L1800-based DTF printer, which I purchased from Neixo in early 2023, I have attached a nozzle check which I performed after cleaning the printhead and the capping station. Unfortunately, the results haven't improved. Could this indicate a printhead issue, or should I consider sending it to your team for repair?

Answer:

Thank you for reaching out with your concerns. At BCH Technologies, we greatly value your support and feedback, especially through our interactions on the BCH Technologies YouTube channel. Each query helps us refine our expertise and offerings.

Based on the nozzle check you've attached, it seems the issue may not be with the printhead itself. It appears that the mainboard could be the culprit here. Often, if a mainboard is damaged significantly, it can affect the printhead as well—potentially damaging the Flat Flex Cable (FFC) too.

From your description, it sounds like the printhead isn't clogged but rather that the firing signal is erratic. This irregularity could be due to a faulty driver chip on the mainboard or a more severe issue like a fried CPU on the mainboard. In this case, replacing the mainboard would be necessary.

Follow-up Question:

Thank you for your guidance, Interestingly, now when I tried to power on my L1800, it wouldn't turn on using the front control panel, although the main power switch at the back was functional. It was working fine last night. Do you think I should send the mainboard to you for diagnosis under your fastrack L1800 service? Should I also send the PSU?

Follow-up Answer:

First, check the FFC cable for any signs of burning or damage. If you're uncertain, it would be prudent to replace it. Given your description, it's highly likely that the printhead has been compromised.

While there is a 90% chance that the Power Supply Unit (PSU, the page also shows you how to test it) is still operational, it’s crucial to address the mainboard issue. If you can secure a functioning mainboard, along with either new FFC cables or a verified old one, and a new printhead, your printer might be salvageable.

However, if it turns out that your mainboard's CPU is indeed burnt, you will likely need a new mainboard.

Addressing printer issues such as these can be intricate due to the detailed nature of the components involved. For instance, while some problems like clogs might seem straightforward, they often necessitate thorough procedures and specific expertise, especially if the printer has been inactive. Issues like a paper jam, with their myriad causes, are familiar challenges we often joke about in the office due to their unpredictability.

For more hands-on assistance, we encourage you to utilize our local diagnostic and repair services at BCH Technologies. We operate on a first-come, first-served basis due to high demand, and guidance on whether to mail in your printer or drop it off will be provided. Please be aware, however, that our fees may not always be the lowest available.

Thank you once again for your detailed questions, and please do not hesitate to explore more troubleshooting videos on our YouTube channel to possibly find solutions to other issues or to prevent future ones.