Would this be symptomatic of a failure in the SMPS, the flyback, or a failing HOT? Not sure where to start, so far flying with no data (I know I know, get a Sam's).
Thanks!
Would this be symptomatic of a failure in the SMPS, the flyback, or a failing HOT? Not sure where to start, so far flying with no data (I know I know, get a Sam's).
Thanks!
Change the two small electrolytics on the primary. 22uf@63volt and
100uf@25volt. On the 22uf, you can use a 50volt rating just fine. The 22 is probably the culprit for the squeal.ha1156w: Probably high ESR or otherwise faulty electrolytics in the SMPS.... or possibly elsewhere on the board on the power supply secondary B+ rails or flyback derived B+ rails.. An ESR meter will help find the faulty electrolytics otherwise the procedure of bridging or substitution is the way to find them.... with the help of an oscilloscope..... and an isolation transformer.
-- Best Regards, Daniel Sofie Electronics Supply & Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Thanks a million -- you were spot on. I replaced those two caps and the oscillations returned to normal!
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.