strophlex Posted April 20, 2012 Report Share Posted April 20, 2012 It must me easy to confuse left and right side at some stage. Maybe pin 4 in the picture is actually the 5V pin. Looking at the power connector and observing the pin you have measured to be 5V. Does that pin mate with the pin labled 4 or the pin labled 5 of the socket in the photo? It makes sense that pin 4 (on the right side of the socket) mates with the trace to the right in the image (which is connected to 5V as you see in the photo)Reference. http://www.singatron.com/eng_pdf/2DJ-0077PA03.pdf It is probobly not the same connector, but it has the same pinout and so is proboly more or less identical. Quote Link to comment Share on other sites More sharing options...
graantjes Posted April 20, 2012 Author Report Share Posted April 20, 2012 The pin labeled 5 on the picture above mates with pin 5 here: http://www.allpinouts.org/index.php/Commodore_C64_Power_Supply Following that same pinout, pin 4 is not assigned on my power supply. So if pin 4 on the above picture I posted mates with the 5v trace, I can change the cables inside the wire to give 5v to pin 4? Quote Link to comment Share on other sites More sharing options...
strophlex Posted April 20, 2012 Report Share Posted April 20, 2012 This is a picture of my PSU connector. It has the four interesting pins only. The numbers are relative to your picture and might be mirrored compared to the image at allpinouts.com. If you compare it with your connector, you should be able to figure out if it is the right pin that measures 5V. It is the one labeled 4 in the photo. Good luck! Quote Link to comment Share on other sites More sharing options...
graantjes Posted April 21, 2012 Author Report Share Posted April 21, 2012 Well, sadly enough that pin 4 on my psu measures nothing, it is pin 5 on the other side of pin 2 that measures 5v (I am orienting my connecter the same way as you with the opening on top) There seems to be many different c64 power supply` s in rotation. thanks, best regards, Joeri Quote Link to comment Share on other sites More sharing options...
strophlex Posted April 21, 2012 Report Share Posted April 21, 2012 Strange, but it explains it. Quote Link to comment Share on other sites More sharing options...
orange_hand Posted April 23, 2012 Report Share Posted April 23, 2012 (edited) Hi, please keep in mind that there are various versions of the C64 power supply. Some of them have got the 5V on pin 5 and 2 instead of 4 and 2. But this was taken into consideration on the MB6582 PCB, so that all versions of that PSU will work on the MB6582 PCB. I have had a couple of those PSU's and all of them worked on my MB6582. See also (sorry only in German available :-) ): http://www.c64-wiki.de/index.php/Netzbuchse Cheers orange Edited April 23, 2012 by orange_hand Quote Link to comment Share on other sites More sharing options...
graantjes Posted April 23, 2012 Author Report Share Posted April 23, 2012 So how do the pins underneath the test pads measure out with you guys? If I can confirm that this psu works, I can exclude this from being the problem. Orange hand: So in case of the psu with 5v on pin 5, is it normal to not measure it on the test pad? thanks! Quote Link to comment Share on other sites More sharing options...
orange_hand Posted April 23, 2012 Report Share Posted April 23, 2012 Hi, it should be possible to measure it on the board of course. I have no blank PCB here, so I can't tell you where to measure at the moment. You should be able to find that out, by following the tracks step by step. Cheers orange Quote Link to comment Share on other sites More sharing options...
graantjes Posted April 26, 2012 Author Report Share Posted April 26, 2012 ok, so looking at MB-6582_Base_PCB_Mono.pdf we have 7 contact points on the back of the power connector J1 The bottom ones are 9v? and the middle one on the left is 5 v? What are the other ones? best regards, Joeri Quote Link to comment Share on other sites More sharing options...
strophlex Posted April 26, 2012 Report Share Posted April 26, 2012 As you see both middle ones are connected together and I guess they are pin 4&5 of the connector, so they are both 5V pins. The Outer top ones are not connected and the top middle one must be ground. Quote Link to comment Share on other sites More sharing options...
graantjes Posted April 28, 2012 Author Report Share Posted April 28, 2012 (edited) the bottom ones measure 9vac but only the left one of the middle pads measures 5v, is this ok? next I measure the switch or? thanks, best regards, Joeri Edited April 28, 2012 by graantjes Quote Link to comment Share on other sites More sharing options...
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