Universal Serial Bus (Usb) Cannot Be Used Normally; The Hoop Sensor Does Not Function Normally - Brother NV4000D Service Manual

Failure Investigation for Electronic Parts The hoop sensor does not function normally
5 - 32
Universal serial bus (USB) cannot
be used normally.
Is the USB cable properly connected to both the
personal computer and the sewing machine?
Y
Does the machine function normally when the
USB cable is replaced with a reliable one?
N
Change panel PCB.
N
Connect it properly.
Y
Change USB cable.