I have acquired an old Robin KMP 3050DL, for my personal use (hobby), but it is not working properly. I know the company was absorbed into Fluke many years ago and any patents they held (from the '80s) will be long gone, so my question is does anyone know of any source of documentation, schematics etc, for these old bits of kit which could help me fix it? I am aware of companies offering to fix and calibrate these things, so the data must be out there. They are very popular on ebay. Is it in the public domain? Anyone got a copy? Again I stress this is for personal use, I don't want to spend a lot of money on it but as it nearly works it may be easy to fix and save from landfill. I presume when these things get replaced/old/fail they are routinely skipped (apart from the ones on ebay), which seems a shame.