Hi, thanks MiaM for your replay. I've checked the 6561-101 and there isn't any oxidation, as well as other parts of mainboard, nothing oxidation. The power supply that I use is the same for the C64, I checked the ouput and there is a surprise, 5.22 Volt DC between ground and pin 5, but 1.1 max 2.5V AC between pin6 vs gnd and 8.7V AC V between pin7 vs gnd, it's very strange. The frequence is correct 50 hz. This issue on pin 6 can be the cause of my audio? I replace the fuse and I saw a strange white material, like oxidaton into the fuse holder. If I want to replace the 6561-101, I simply buy a new one and insert into the socket, or it need to be programmed? Thanks for all you help. -- Sent from: http://cbm-hackers.2304266.n4.nabble.com/Received on 2019-01-06 18:00:02
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