Epson R1390 DTF Printer Not Turning On: Troubleshooting Power and Control Board Issues

Question:
My Epson R1390 DTF printer (Colorsun) turns on from the back, but the control board doesn’t power up, and the printer won't start. I have a reset button circuit board above my breakout board, but I’m unsure where the FFC should be connected. Can you suggest what I must do to get the printer working again?
 
Answer:
Thanks for your inquiry, and I appreciate your patience while waiting for a reply. I know how important it is for you to get your printer up and running as soon as possible. Our team at BCH Technologies thanks you for your support engagement, including your participation on our YouTube channel [https://youtube.com/@bchtechnologies]. 
 
Now, for your Epson R1390 DTF printer (Colorsun manufactures it), from the information you provided, the main power is likely getting to the printer. Still, the control board fails to turn on, preventing the printer from starting entirely. This problem can be attributed to several different microservices, so I will take you through some troubleshooting steps to debug and fix the problem.
 
Troubleshooting Steps:
Inspect FFC: The first step is to inspect the control board connections, particularly the Flat Flexible Cable (FFC). A loose or mis-seated cable can prevent the control board from receiving power or signals, which will prevent the printer from powering on. Make sure there’s a good connection to both ends of the FFC, right to the control board and the mainboard.
Please check for Any Visible Damage: Once you have ensured that all connectors are seated well, you can examine the control board for apparent damage, such as burnt components, blown capacitors, or discoloration. If you find any damage, the control board may need to be repaired or replaced.
Check Power Supply Voltage: Measure the voltage at the connectors to the control board using a multimeter. A faulty power supply unit might be the cause if the voltage is not enough or unstable. The board might not get the correct voltage due to a weak or faulty power supply.
Fuse or Surge Protection Check: Internal fuses or surge protectors are sometimes used in printers located near the control board to protect them from electrical damage. If these fuses/protectors are blown, the control board may not receive power. Could you look at these components and replace any burnt fuses or damaged protectors?
Do a Firmware or Hardware Reset: The control board may not turn on in case of a firmware or hardware issue, but this is rare. Refer to your printer’s manual or the manufacturer’s documentation for reset instructions. Performing a reset might fix software-related problems that prevent the control board from working correctly.
Check the Mainboard: The mainboard is responsible for powering and controlling the printer. Any issue with the mainboard tends to make the control board inactive. Could you check the mainboard for anything that looks burnt or has failed? If you suspect damage to the mainboard, repair or replacement may be necessary. BCH Technologies can repair the Epson R1390 mainboard.
Inspect the FFC Cables: Broken or malfunctioning FFC cables could also cause power problems, keeping the printer from powering on. Inspect the wires closely for wear and tear, fatigue, or damage. If you notice any, replacing the FFC cables could solve the issue.
Please take a look at the Reset Button Circuit Board: It sounds like you have a reset button circuit board above the breakout board. It is connected to the mainboard's CSIC (Carriage Scanner Interface Card) connection. A bad connection with the reset board or a flipped FFC cable can cause a power issue. NOTE: Wiring diagram for Epson R1390 - [https://bchtechnologies.com/products/wiring-diagram-for-epson-1390-c655-main-mainboard-colorsun-board-as-in-the-picture?_pos=8&_sid=609aaae05&_ss=r].
Inspect the Printhead Once the mainboard is repaired or replaced, it’s also essential to test the printhead. Sometimes, the printhead can prevent the printer from turning on or cause other issues. If you want us to repair your mainboard but are unsure about the printhead, we can inspect it to check if it requires replacement or can be repaired.
 
Additional Recommendations:
If the printer does not turn on after performing these steps, replacing the mainboard, resetting the button circuit board, or resetting the entire control board will be necessary. If you own an Epson R1390, we perform repairs on this hardware and can have these elements up and running again.
As I explain in the video here [https://www.youtube.com/watch?v=HREqMeOJT7M], even if you have a functional ink management system, the printer still might not power on if some other significant elements aren’t functioning correctly. So, you must inspect all connections, components, and wiring to get it repaired successfully.
 
 
Troubleshooting printers in this manner can be very tricky since mechanical and electrical components are so involved. Unfortunately, we cannot help with remote troubleshooting or specific repair advice for individual printers. However, we offer in-person analysis and repair inside our neighborhood diagnostic facility. Please keep in mind that our services are in high demand, and we work on a first-come, first-served basis, so there may be a few weeks that we cannot help you at first.
However, if you would like to fix it yourself, you can use the internet, such as YouTube, or even visit our YouTube channel, https://youtube.com/@bchtechnologies, for many tutorials on printer repairs. If you have a problem, search the YouTube menu bar using the left icon to find videos related to your specific issues.
 
Thanks again for contacting us. I hope these troubleshooting steps help you get your printer back up and running! Please don't hesitate to contact us if you have any further questions or want to proceed with repair services.