Rocktron Intellifex LTD service manual and help troubleshooting

[nickstomp]

I have a Rocktron Intellifex LTD and I'm searching schematic/service manual of it for troubleshooting.

It have a strange behaviour when powered up it randomly reset itself, like it have a power loss, relay click and shut off all, and then restart

the sound is coming out good from it when it's not resetting itself

What can I check? i'm not doing nothing in particular to it to happen, only leave ON for few minutes

[Enzo]

so monitor the power supply voltages and see if any are interrupting when it resets.