I think a good visual inspection followed by the use of an ohm meter would be my first plan. Then repair the cord and install the correct fuse. If you have an ESR meter, check the bulk capacitors and replace as necessary.
Power it up directly and measure the power rails next. I usually follow the performance section of the service manual as it will show you what works.
Calibration would be your next step and lead you to any troubleshooting that might still be needed.
Good luck and nice find with the cover still there.
Regards
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On 4/27/2019 6:35 PM, groups@... wrote:
All,
While I was searching eBay for a transistor adaptor for my 576, I came across a parts 577 in good condition with both the adaptor and an original safety cover for a low price... and ended up snagging it, too.
It was advertised as not powering up - and on closer inspection, the power cable's strain relief is loose, and there's no fuse present. I can obviously fix both, but I'm wary of powering it up given that perhaps there's a reason the fuse is absent (although I'm comfortable checking rail voltages with suitable precautions once it's up). Any advice? Would a variac help?
Thanks,
Neil
