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Axpert MKS IV main firmware version 74.04 for '2809 DSP.zip 1.0.0

By Coulomb

1 Screenshot

This is unpatched main (U1) firmware version 74.04 for the Axpert MKS IV. Do not confuse with the Axpert VM IV which looks similar, or the Infinisolar V IV which looks identical (possibly apart from the colour). This will not work if you happen to have a model that comes with the '28066 DSP chip; see this post for details.

Firmware upload instructions.

Use at your own risk.

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