Troubleshooting Power Issues in Epson 1390 Printers

Q&A: Solving Power Problems in Epson 1390 Printers After Printhead Swap

Question: My Epson 1390 printer fails to power on. I enjoy your channel and have watched many of your videos. I recently swapped the printhead in my 1390, which is part of a UV flatbed printer. After cleaning the printhead with alcohol and letting it dry for a few hours, I reinstalled it. Initially, the printer powered on fine, but it lost power when I sent a print job. I suspect I might have shorted something out. Despite installing a new motherboard, power board, and ribbon cable, the issue persists. Have you encountered this issue with your extensive experience?

Answer: Thank you for reaching out to us at BCH Technologies. We are grateful for your engagement and support, particularly regarding our YouTube channel. Your feedback plays a crucial role in further developing our technical expertise.

When dealing with power issues in the Epson 1390 printer, especially after a printhead swap, there are several potential factors to consider:

1. Printhead Damage: If the printhead causes a short circuit, it's essential to replace the printhead itself. In many cases, customers replace the mainboard but overlook the printhead, leading to persistent issues.
2. Power Supply Testing: Verify that the power supply to the mainboard is functioning correctly. Check the input voltages to ensure they match the specifications. If the mainboard receives the correct power, proceed to test the MOSFETs. These components act as the power bridge. If they are functioning properly, the mainboard should power up.
3. Component Testing: After confirming the power supply and MOSFETs are intact, inspect the transistors and capacitors on the mainboard. Ensure there are no faulty components. An infrared camera can be helpful in detecting any energy leaks or hot spots on the board.
4. Cable Inspection: Check all FFC cables for burn marks or breaks. The connection between the control panel and the mainboard is crucial. A broken connection might prevent the power-on signal from reaching the mainboard.

Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. For instance, resolving a simple clog might involve advice on unclogging procedures. However, if the printer remained inactive during downtime, a comprehensive service for the ink system could be necessary. Situations like a "paper jam" can arise from hundreds of potential causes, and solving such an issue has become something of an in-office jest. 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. 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 or mail it to us. Our services are structured to repair either a whole printer or specific parts, with clear instructions on how to proceed if you opt for mail-in or local drop-off services. 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. 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.

Thank you again for contacting us. We hope this information helps you resolve the power issue with your Epson 1390 printer. If you have any further questions or need additional assistance, please feel free to reach out.