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Firmware Usb | Tp.sk506s.pb802

A: You need a JTAG or SPI programmer. The PB802 may have hidden USB pads (labeled D+ and D- ). Solder a USB pigtail.

diskpart list disk select disk X (your USB) clean create partition primary format fs=fat32 quick active assign tp.sk506s.pb802 firmware usb

A: Yes. Always back up /etc/calibration.conf or similar via serial before flashing. A: You need a JTAG or SPI programmer