URBatORB Posted June 11, 2007 Report Share Posted June 11, 2007 Hello,I get only 1,62 V at the 5 V output of the improved 4xSID PSU. If I measuren the 14 V output I get 14,19 V - that seems to be OK. But what is wrong with the 5 V output? Can anybody help?/Daniel Quote Link to comment Share on other sites More sharing options...
Wilba Posted June 11, 2007 Report Share Posted June 11, 2007 Test the 5v output of the C64 PSU without connecting to anything... i.e. test pins of the DIN plug. Quote Link to comment Share on other sites More sharing options...
URBatORB Posted June 12, 2007 Author Report Share Posted June 12, 2007 Hello,that's very curious. When I test the voltage directly at the C64 psu plug, I get 10 V. I had the 5 V before I connected the improved PSU to the Core Module. But I can't find an error at the Core Module (as recommended the 7805 is not stuffed and I have shortened the input/output line at the board and connected the psu to the J2). Mhmmm, I'll test the Core Module again later. I'll stuff the 7805 and test the Core Module with a cheaper wallwart, maybe there is still an error. But another question, can I destroy the C64 Plug by an error at the Core Module? Quote Link to comment Share on other sites More sharing options...
Wilba Posted June 12, 2007 Report Share Posted June 12, 2007 Something is wrong if you get 10v at the C64 plug, with it disconnected...It should be 9v AC and 5v DC. Quote Link to comment Share on other sites More sharing options...
URBatORB Posted June 12, 2007 Author Report Share Posted June 12, 2007 Hello,Hello,second measuring directly at the C64 PSU:At the 5 V DC = 8,9 VAt the 9 V AC = 10,2 VAt the 5 V improved PSU 2,3 VAt the 14 V improved PSU 17,6 VI think I found the failure. It is a short circuit / loose connection between 5 V + and - at the original DIN Connector from the C64. The circuit indicator peeps sometimes if i connect it between the + and the - PIN-connection (the C64 PSU is not connectet during the test). Or is it due to the unloading of the capacitor(s)?Nevetheless, the C64 PSU is damaged :'( Quote Link to comment Share on other sites More sharing options...
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