Question:

I bought an Epson L1800 DTF Printer, and now it will not power on with the front power button. I tested the F1 fuse and now need to test the QF601 transistor but am not sure how. Should I just order a new one and replace it?

Answer:

Thank you for contacting us at BCH Technologies. We are grateful for your engagement and support, particularly with regard to our YouTube channel (https://youtube.com/@bchtechnologies). Your feedback plays a crucial role in further developing our technical expertise.

To address the power issue with your Epson L1800 DTF Printer, let's start by examining the components you mentioned:

F1 Fuse:

• The F1 fuse typically doesn't affect the printer's ability to power on. Even if the F1 fuse is faulty, the printer should still turn on without any issues.

QF601 Transistor:

• The QF601 transistor can sometimes prevent the printer from turning on, although it primarily impacts printing speed rather than power. However, it’s worth checking. ainboard-tester-diode-triode-pnp-npn-mosfet-capacitor-resistor/

Here are the steps to troubleshoot and resolve the power issue:

1. Testing the QF601 Transistor:
2. • To test the QF601 transistor, We use the auto tester to test it. https://bchtechnologies.com/auto-detect-epson/hp/canon-m. If you are unsure about testing it yourself, consider ordering a replacement.
3. Checking the Power Bridge Transistors:
   • In addition to the QF601, it’s essential to check the power bridge transistors, as they play a significant role in powering the printer. These transistors are often paired and work together to manage power distribution within the printer.  We have a video about how to test them: https://youtu.be/c_kmqwyZjLgYou can find the necessary transistor pair here: Transistor Pair for Epson L1800 (https://bchtechnologies.com/transistor-pair-c6082-2sc6082-and-a2210-2sa2210-for-epson-ecotank-l1800/).
4. Inspecting the FFC Cable:
   • The Flat Flexible Cable (FFC) connecting the control panel to the mainboard is another component to examine. A damaged or disconnected FFC cable can prevent the printer from powering on.
   • You can find a suitable replacement cable here: 9-Pin FFC Connector Cable (https://bchtechnologies.com/9-pin-ffc-connector-cable-for-l1800-control-panel-and-mainboard/).

Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. 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 (https://bchtechnologies.com/printer-repair-service). 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 (https://youtube.com/@bchtechnologies). 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 reaching out to us. We appreciate your patience and understanding as we work to assist all our customers.