[ben]

Thanks for the responses. The s/n is 2216252, so fortunately has the later design.
The board is not the most pleasant to work on - no component numbers at all, and whilst the print side is easily accessible, the same cannot be said for the component side. I will try to make some kind of a jig to be able to run the unit out of the case.
John, there are few yellow Elkos in this one, limited to the amp (which works). Michael, will check that 80uf cap first of all, thanks.