ChrisHipgrave Posted October 15, 2006 Report Share Posted October 15, 2006 Hi,I am having a problem with my psu. I made it a couple of weeks ago and the output voltages were fine (around 5 and 14). I then connected the bankstick bits to the core and now for some reason the output voltages of the psu are different (about 1v and 9v). Is there something wrong with my psu board or is the c64 psu broken?Does anybody have any ideas?Thank youChris Quote Link to comment Share on other sites More sharing options...
Wilba Posted October 15, 2006 Report Share Posted October 15, 2006 You have to learn how to troubleshoot!Disconnect the bankstick bits, retest voltages.Disconnect C64 PSU, test voltages coming out of it.If everything tests OK in isolation, then pull out the bankstick chip(s), look for short circuits in your bankstick bits, etc. Quote Link to comment Share on other sites More sharing options...
ChrisHipgrave Posted October 15, 2006 Author Report Share Posted October 15, 2006 It seems that it's the c64 psu which is broken.Does anybody know where i can get another?Thnak youChris Quote Link to comment Share on other sites More sharing options...
HL-SDK Posted October 15, 2006 Report Share Posted October 15, 2006 mouserdigikeyjamecofuturlecThey should all have switches. Any power switch should be good... Depends on what the switch is switching. If It's wall power before any transformers, get a nice rugged one. It shouldn't cost more than $5... I have a nice little one that lights up right next to me ^__^ Quote Link to comment Share on other sites More sharing options...
carsten_the_dane Posted October 15, 2006 Report Share Posted October 15, 2006 Perhaps the fuses are blown ??? Quote Link to comment Share on other sites More sharing options...
ChrisHipgrave Posted October 15, 2006 Author Report Share Posted October 15, 2006 Perhaps the fuses are blown ???Quite possibly, but there is no way of getting inside unless i break it. Quote Link to comment Share on other sites More sharing options...
Wilba Posted October 16, 2006 Report Share Posted October 16, 2006 If the fuse is blown, there'd be no power at all.If there's still some voltage on the output, perhaps the transformer is half fused or something, resulting in less output. You'll probably need a new C64 PSU. Before you plug it in, though, you should work out if your "bankstick bits" is what caused your previous one to fail. Use your multimeter to check short circuits between +5V and ground. Quote Link to comment Share on other sites More sharing options...
carsten_the_dane Posted October 16, 2006 Report Share Posted October 16, 2006 if it is a c64 psu, and thats what i read from your first post, you will get some power from the psu even though one fuse is blown. ([edit]: oh, wilba said that just above) On the backside of the psu there are 2 black circles. Open them and check the fuses.I had that problem last week. check out my earlier posts./carsten Quote Link to comment Share on other sites More sharing options...
HL-SDK Posted October 16, 2006 Report Share Posted October 16, 2006 Fuses... Protecting our precious transformers wherever they go! (I've lost 2 or 3 transformers that way! (too much current)) Quote Link to comment Share on other sites More sharing options...
ChrisHipgrave Posted October 16, 2006 Author Report Share Posted October 16, 2006 I don't seem to be getting any current from i at all. I guess i'll just buy another.Thanks for your help Quote Link to comment Share on other sites More sharing options...
stryd_one Posted October 17, 2006 Report Share Posted October 17, 2006 Sloooowww dowwwwn Chris. Read Wilba's posts again :) Quote Link to comment Share on other sites More sharing options...
toneburst Posted October 17, 2006 Report Share Posted October 17, 2006 Not strictly an answer to Chris' problem. more of a question really:If I wanted to have an internal PSU for my MBSid (afterall, who wants another cable brick to fall over, especially one as chunky as the C64 transformer), would it be feasible to take the C64 one out of its enclosure and stick it in the box with the Core/Sid boards, or would it be better to build an alternative from scratch? I guess you could build something a lot smaller with modern components, but I may be wrong.Any thoughts anyone?Alexhttp://www.toneburst.net Quote Link to comment Share on other sites More sharing options...
carsten_the_dane Posted October 17, 2006 Report Share Posted October 17, 2006 Have you read my thread?:http://www.midibox.org/forum/index.php?topic=7631.0As i said, i had kinda the same problem. And have you opened up to check for the fuses on the backside of the c64 psu, next to the power button (atleast on the cpu i have, look at the picture, i have the one on the left)./carsten(and to Toneburst bursting in (ho ho), i have seen a thread somewhere on the forum where a guy had 2 different psu build in to his machine. New and quite small units. i just cannot find it again) Quote Link to comment Share on other sites More sharing options...
ChrisHipgrave Posted October 18, 2006 Author Report Share Posted October 18, 2006 I have the the one in the middle but the bottom of it has been ripped off. I cannot see any fuses.I think i know why it's possibly broken. I got a bit confused with the wiring of the psu board and the connections of the core and sid. When i turned it on there was a sizzling sound.I then found out that i'd soldered it wrong and changed the wiring.Would this have broken it? Is it possible that anything on the boards will be broken?Chris Quote Link to comment Share on other sites More sharing options...
Therezin Posted October 18, 2006 Report Share Posted October 18, 2006 I have the the one in the middle but the bottom of it has been ripped off. I cannot see any fuses.If yours is anything like mine, You'll find the fuse in the mains plug. Quote Link to comment Share on other sites More sharing options...
ChrisHipgrave Posted October 18, 2006 Author Report Share Posted October 18, 2006 If yours is anything like mine, You'll find the fuse in the mains plug. Quote Link to comment Share on other sites More sharing options...
stryd_one Posted October 19, 2006 Report Share Posted October 19, 2006 Nothing, as in 0 volts?Do you get 240V before the transformer? what about the 2ndary side of the tranny? Quote Link to comment Share on other sites More sharing options...
carsten_the_dane Posted October 20, 2006 Report Share Posted October 20, 2006 Thats the C128 and amiga PSU, right?Isnt the wiring different on this one. Check out this link:http://www.vintage-computer.com/vcforum/showthread.php?t=896/carsten Quote Link to comment Share on other sites More sharing options...
ChrisHipgrave Posted October 20, 2006 Author Report Share Posted October 20, 2006 Nothing, as in 0 volts?Do you get 240V before the transformer? what about the 2ndary side of the tranny?Yeah 0v. It's showing 240v befor the transformer but 0v after. Quote Link to comment Share on other sites More sharing options...
stryd_one Posted October 20, 2006 Report Share Posted October 20, 2006 There you have it, fried transformer. Must be really fried to give off 0V! :( Quote Link to comment Share on other sites More sharing options...
ChrisHipgrave Posted October 26, 2006 Author Report Share Posted October 26, 2006 So i got my new c64 psu (finally) but i've got another problem :'(The 5v output is now reading 3.30vand the 14 is reading 12.30vDoes anybody have any ideas what might be wrong with my psu board? I'm guessing that a component(s) broke when i wired it up to the SID and CORE? Quote Link to comment Share on other sites More sharing options...
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