[John M0GLN]

Thank you all for your advice, I did solder a small capacitor into the Marantz a couple of years ago before reading the warning in the manual, normally I always get good shiny wet joints but these were exactly as you have suggested, they were two dull blobs, it's still working fine and they are in a non critical position so I'll leave them alone unless the fault re-appears, if it does or if I have any others to do I will remove the lead free solder first.

Thanks

John