Diagnosing and repairing a Brother fax/printer USB failure

Downtown Doug Brown looks at a Brother FAX-2840 fax machine/laser printer. It still worked fine as a fax machine or copy machine, but it couldn’t print to a Windows 10 computer via USB.

Windows would not recognize the hardware even with the correct driver, “unable to enumerate device”. Tearing it down, the D+ line was not reaching 0 volts per the USB spec.

Read the lengths to which this printer was handled in the blog post here.

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• Source: https://blog.adafruit.com/2023/04/28/diagnosing-and-repairing-a-brother-fax-printer-usb-failure/