Sphinx project ten amplifier. Fuses broke.. changed fuses and broke again

Hi there,

I'm not elektronic wise. But I find out that the fuses Z1 and Z2 are both broken. After new ones they burn again. Maby somebody had the same issue and can tell me what to do.

I know that the wise thing to do is bring it to a repairshop, but I have not the money for it.