Wilba Posted July 19, 2008 Author Report Share Posted July 19, 2008 This is very strange.Can you tell me exactly what components are on the base PCB and where you are measuring this 8-12V?And why is it a range of 8-12V and not an exact value? Why is it changing?I can only think the C64 PSU is broken somehow and not outputting regulated 5V, since for PSU Option A, the 5V and ground tracks are directly connected to pins of the C64 PSU plug. Quote Link to comment Share on other sites More sharing options...
Jack Posted July 19, 2008 Report Share Posted July 19, 2008 Hi Wilba,I am at this point: "Completing the Base PCB in Stages"No IC is mounted and only parts for PSU Option A is soldered.C64 Power Supply:- 10,8V AC- 6,3V DC (2,4V AC)Base PCB measured points:J09, J3, UX_COREX Pin 11-12 and 32-31.I think its the AC ratio of the +5V line of the power supply causes this problem.The volatge is stable at the moment at 8,4V but only the first measurement I have 12,3V.Best regardsJack Quote Link to comment Share on other sites More sharing options...
Wilba Posted July 19, 2008 Author Report Share Posted July 19, 2008 Is that 6,3V DC coming out of the C64 PSU plug, between middle pin (ground) and the one next to it, when it's not connected to the base PCB?That is supposed to be regulated +5V. It might range a little bit around that value... maybe as much as 4,9V-5,1V but definitely not 6,3V.If you are not getting regulated +5V out of the C64 PSU then the problem is with the C64 PSU and not the PCB at all. Quote Link to comment Share on other sites More sharing options...
Jack Posted July 19, 2008 Report Share Posted July 19, 2008 Hi Wilba,Problem solved with a new C64 power supply. Thanks for helping.Best RegardsJack Quote Link to comment Share on other sites More sharing options...
renepela Posted September 25, 2008 Report Share Posted September 25, 2008 Maybe a question answered before, but are the errors fixed in the PCB's I order last week from SmashTV? Quote Link to comment Share on other sites More sharing options...
Wilba Posted September 26, 2008 Author Report Share Posted September 26, 2008 Maybe a question answered before, but are the errors fixed in the PCB's I order last week from SmashTV?Yes. If it's from SmashTV, it's 100% error free. Quote Link to comment Share on other sites More sharing options...
sineSurfer Posted December 29, 2008 Report Share Posted December 29, 2008 "You will have to connect the B+ pin (pin 9) to +5v (pin 12)"It's the same case with the other LCD headers, right? Quote Link to comment Share on other sites More sharing options...
Wilba Posted December 29, 2008 Author Report Share Posted December 29, 2008 The other J15 headers don't have backlight circuits, since they are only there for completeness and maybe for debugging with an LCD that doesn't need backlight. Quote Link to comment Share on other sites More sharing options...
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