padjoe.thornton Posted March 9, 2011 Report Share Posted March 9, 2011 Hi everyone I'm really enjoying this project Great forum with nice people I have built http://www.ucapps.de/mbhp/mbhp_8xsid_c64_psu_optimized.pdf and am using 2 sid one core I'm connecting the modules firstly to a safe power supply where im going to power it up and if there are any shorts it will tell me, I wanna do this to be safe with the circuit, and so I can Identify any problems before I use the C64 PSU I'm using the newer SID chip the 8580 and using a C64 power supply that came with the newer C64. I'm finding it difficult to identify all the PINs especially PIN 6 coming from the C64 PSU and into the socket and into the power switch on the left of the diagram. I'm taking it that PIN 7 is 9VAC, PIN 2 is Ground, and PIN 5 is 5VDC Here is a schematic of the C64 power supply http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/c64/c64extps.gif This is probably a complete Newbie question but I just want to be sure Thanks in Advance PJ Quote Link to comment Share on other sites More sharing options...
Imp Posted March 9, 2011 Report Share Posted March 9, 2011 Hi PJ, as far as i know, all versions of the C64-psu had the same pinout. So, pin 6 is located as shown in that picture. It doesn't matter, if you exchange pins 6 and 7, because the AC they deliver gets rectified afterwards. You can see that in the pdf: those diodes marked "X1" are the same for both lines. To identify pin 5, just use a multimeter. Quote Link to comment Share on other sites More sharing options...
Wilba Posted March 9, 2011 Report Share Posted March 9, 2011 Also, sometimes a C64 PSU has the 5V pin on the other side of ground. It is safe to connect both those pins together on the socket side (this is what I did on MB-6582 PCBs). Quote Link to comment Share on other sites More sharing options...
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