Post by thread:Picstart+ Power supply

Hello all, I've got a Picstart+ programmer, and just now the power supply died (Microchip power adaptor, Model PTF09075I , Switched-mode type). That's the second one in less than a year. Does anyone else have this kind of problems with it ? Does anyone know what part died ? Maybe I can replace it myself ... I can ask another one from the local sales rep, but that means that I have to pay sending of the package (they first want to see the dead supply, before they send a repalcement) , resulting in a higher price than when I replace it with a standard adaptor in the first place :-( Greetz, Rudy Wieser

I have five of them and all work perfectly -- Richard Clemens Associate Professor Computer Science Department West Virginia Wesleyan College Buckhannon, West Virginia 26201 spam_OUTclemensTakeThisOuTwvwc.edu 304.473.8421 {Original Message removed}

Mine died as well. Spend two hours trying to fix it. Then it went straight to the bin. Build a 9V PSU with a LM317. Been programming with it for a month now. No problem. Quentin PS: My patience is very short with Switch mode PSU's

Hi, I have had a few PSU's die. A while ago now though. The part that failed on my supplies was a large 1W ish 1R or 10R res. (that sort of order). The part went O/C. It appeared to have burnt. I fitted the same value but larger W. I think that it was quite obvious which was the resistor at fault. Take the lid off and have a look. I can't remember exactly. Hope it helps. Rgds... ...Andy At 10:20 11/03/99 +0100, you wrote: {Quote hidden}>Hello all, > > I've got a Picstart+ programmer, and just now the power supply died >(Microchip power adaptor, Model PTF09075I , Switched-mode type). That's >the second one in less than a year. Does anyone else have this kind of >problems with it ? > >Does anyone know what part died ? Maybe I can replace it myself ... > >I can ask another one from the local sales rep, but that means that I have >to >pay sending of the package (they first want to see the dead supply, before >they send a repalcement) , resulting in a higher price than when I replace >it >with a standard adaptor in the first place :-( > >Greetz, > Rudy Wieser >

At 10:20 11/03/99 +0100, you wrote: > I've got a Picstart+ programmer, and just now the power supply died >(Microchip power adaptor, Model PTF09075I , Switched-mode type). That's >the second one in less than a year. Does anyone else have this kind of >problems with it ? I did, when the programmer was plugged into the computer (24 hr) supply. It seems to overheat (there's a large, and fairly obvious, resistor inside which needs to be replaced) if left on all the time. Maybe one of those '1 hour' switches would help? The PSU I use now had the resistor replaced about 2 years ago and is still going strong. Nigel -- Nigel Orr Research Associate O ______ Underwater Acoustics Group, o / o \_/( Dept of Electrical and Electronic Engineering (_ < _ ( University of Newcastle Upon Tyne \______/ \(