Uploaded March 2026 | Updated September 2026, 2 weeks ago
Printer motherboard issues can often be traced back to small but critical components that control the power going to the printhead. One of those components is the QF1 MOSFET transistor, which works closely with the F1 fuse to regulate and protect the power path inside many Epson printers. When either of these components fails-or is accidentally knocked off during a repair-the printer may stop working entirely.
In this video, we walk through how to remove and reinstall the QF1 transistor using a hot air rework station. We also explain what the QF1 transistor does, how it interacts with the F1 fuse, and why these components often fail together. You'll see the exact temperature settings used for hot air removal, how to clean the pads with solder wick, and how to properly place and secure the replacement transistor using solder paste.
Additionally, the video demonstrates how to test the repair with a multimeter. We go over continuity mode, diode mode, and resistance testing so you can quickly confirm whether the transistor and fuse are functioning correctly. Understanding these simple electrical tests can help prevent repeated board failures and ensure that the printhead power circuit is safe before powering the printer back on. If you're repairing an Epson motherboard and suspect issues with the F1 fuse or QF1 transistor, this walkthrough will help you understand the power path from the power supply to the printhead driver ICs and how to diagnose faults along the way. For more printer repair tutorials, troubleshooting guides, and replacement parts, visit BCH Technologies.
For other helpful videos, go to youtube.com/bchtechnologies
For printer repair:
🢡 Visit us: BCH Technologies, 506 Radar Road, Suite B, Greensboro, NC 27410.
🢡 Send the printer for repair! bchtechnologies.com/printer-repair-service Yes! We repair DTF, DTG, and sublimation printers too!
🢡 Donate your printer to us! Contact support@bchtechnologies.com
More support options for your printer device are available at support.bchtechnologies.com
Continue the Conversation: support@bchtechnologies.com
FACEBOOK: facebook.com/bchtechnologies
TWITTER: twitter.com/BCHTechnologies
INSTAGRAM: instagram.com/kevinatbch
LINKEDIN: linkedin.com/company/bchtechnologies
TIKTOK: tiktok.com/@kevinsinknmore
SHOP NOW: bchtechnologies.com
About BCH: BCH Technologies is an innovative company focusing on ink and related products. Founded in 2011, the company transforms how people and businesses refill their printers through innovative technology solutions. Our core purpose guides the research direction of 1) preventing land waste and 2) bringing customers better products with lower costs. Every day, over one million ink cartridges are thrown into landfills worldwide. The company has focused on working with businesses of different sizes, from Fortune 500 companies to entrepreneurial starters, to develop custom ink, spanning from printer ink to stamp ink, re-entry ink, indelible ink, redaction ink, invisible ink, and more.This video is intended for informational and educational purposes only and should not be considered professional advice, endorsement, or a recommendation. The content provided does not constitute technical or expert guidance. If you choose to act on the software or information presented, we strongly encourage consulting with a qualified professional. Any reliance on the information in this video is at your own discretion and risk.
#PrinterRepair#EpsonPrinterRepair#ElectronicsRepair#MOSFETRepair#CircuitBoardRepair#HotAirRework#PrinterTechnician#RightToRepair#PrintheadRepair#BCHTechnologies
Printer motherboard issues can often be traced back to small but critical components that control the power going to the printhead. One of those components is the QF1 MOSFET transistor, which works closely with the F1 fuse to regulate and protect the power path inside many Epson printers. When either of these components fails-or is accidentally knocked off during a repair-the printer may stop working entirely.
In this video, we walk through how to remove and reinstall the QF1 transistor using a hot air rework station. We also explain what the QF1 transistor does, how it interacts with the F1 fuse, and why these components often fail together. You'll see the exact temperature settings used for hot air removal, how to clean the pads with solder wick, and how to properly place and secure the replacement transistor using solder paste.
Additionally, the video demonstrates how to test the repair with a multimeter. We go over continuity mode, diode mode, and resistance testing so you can quickly confirm whether the transistor and fuse are functioning correctly. Understanding these simple electrical tests can help prevent repeated board failures and ensure that the printhead power circuit is safe before powering the printer back on. If you're repairing an Epson motherboard and suspect issues with the F1 fuse or QF1 transistor, this walkthrough will help you understand the power path from the power supply to the printhead driver ICs and how to diagnose faults along the way. For more printer repair tutorials, troubleshooting guides, and replacement parts, visit BCH Technologies.
For other helpful videos, go to youtube.com/bchtechnologies
For printer repair:
🢡 Visit us: BCH Technologies, 506 Radar Road, Suite B, Greensboro, NC 27410.
🢡 Send the printer for repair! bchtechnologies.com/printer-repair-service Yes! We repair DTF, DTG, and sublimation printers too!
🢡 Donate your printer to us! Contact support@bchtechnologies.com
More support options for your printer device are available at support.bchtechnologies.com
Continue the Conversation: support@bchtechnologies.com
FACEBOOK: facebook.com/bchtechnologies
TWITTER: twitter.com/BCHTechnologies
INSTAGRAM: instagram.com/kevinatbch
LINKEDIN: linkedin.com/company/bchtechnologies
TIKTOK: tiktok.com/@kevinsinknmore
SHOP NOW: bchtechnologies.com
About BCH: BCH Technologies is an innovative company focusing on ink and related products. Founded in 2011, the company transforms how people and businesses refill their printers through innovative technology solutions. Our core purpose guides the research direction of 1) preventing land waste and 2) bringing customers better products with lower costs. Every day, over one million ink cartridges are thrown into landfills worldwide. The company has focused on working with businesses of different sizes, from Fortune 500 companies to entrepreneurial starters, to develop custom ink, spanning from printer ink to stamp ink, re-entry ink, indelible ink, redaction ink, invisible ink, and more.This video is intended for informational and educational purposes only and should not be considered professional advice, endorsement, or a recommendation. The content provided does not constitute technical or expert guidance. If you choose to act on the software or information presented, we strongly encourage consulting with a qualified professional. Any reliance on the information in this video is at your own discretion and risk.
#PrinterRepair#EpsonPrinterRepair#ElectronicsRepair#MOSFETRepair#CircuitBoardRepair#HotAirRework#PrinterTechnician#RightToRepair#PrintheadRepair#BCHTechnologies
