MCU Boot Loader Troubleshooting

When MCU firmware load is interrupted, or the power-on firmware checksum test fails, the KH1 enters its bootstrap loader. You can also force the KH1 to enter its bootstrap loader by turning the KH1 on with a 10-second press and hold of the two POWER buttons (RATE and A/B). The MCU boot loader displays MCU LD on the KH1 front panel display. The display may not be backlit.

To load KH1 firmware, follow these steps in sequence: