UWP

This universial wireless platform,aka UWP had given me a headache for month until 2 months ago. I’ve had an issue where when I build them and burn them in, 30% of them got burned out. After spending months of careful examination, finally had figured out that it was feeding 3.3V into VSOSC when it shouldve been 1.3! It seemed like the oscillator was overrunning and got heat up..and eventually killed the BGA. Now 30 new modified ones are getting burned in and none has died. Hewh..

~ by esyonge on August 7, 2008.