mikeofaustin
Bronze Member
These little computers ( that my company designed), had a great run on the delta units, so we ran another 4k units again (selling price $850). No immediate problem was found, until after I got the first articles out of 'retail' packaging. Immediately I noticed a constant 'lock up' problem. I'd be surfing the net, etc., and it would just lock up. 50 percent of the units were having this problem.
[technical]
Long story short, the contract manufacturer purchased a wrong component. What a great relief off my shoulders because it would have came back to me if it was a design issue. The CM will now have to rework all the units on their dime. If it were my design problem, I would be receiving a LOT of grief. I debugged this for about a week and finally located it. The switching regulator 'top' and 'bottom' fet was overlapping, shorting the supply line and causing a huge ringing on the supply line. All the regulators run off the supply line, so it was a very difficult problem to find.... AND, it only overlapped about once in a 5 minute period. Very hard to debug. Production stopped, retail stopped, invoices stopped.... 3.2 million.
Wew, this calls for a celebration... or at least, we'll watch a movie at work on the computer to make sure the problem is fixed. I'm thinking we'll watch "What's eating gilbert grape" since no-one in my office has seen it. (sometimes, I'll say, "I not sorryyyy"... and they didn't know WHAT I was referring too).
what an absolute relief. Absolute relief!!!
[technical]
Long story short, the contract manufacturer purchased a wrong component. What a great relief off my shoulders because it would have came back to me if it was a design issue. The CM will now have to rework all the units on their dime. If it were my design problem, I would be receiving a LOT of grief. I debugged this for about a week and finally located it. The switching regulator 'top' and 'bottom' fet was overlapping, shorting the supply line and causing a huge ringing on the supply line. All the regulators run off the supply line, so it was a very difficult problem to find.... AND, it only overlapped about once in a 5 minute period. Very hard to debug. Production stopped, retail stopped, invoices stopped.... 3.2 million.
Wew, this calls for a celebration... or at least, we'll watch a movie at work on the computer to make sure the problem is fixed. I'm thinking we'll watch "What's eating gilbert grape" since no-one in my office has seen it. (sometimes, I'll say, "I not sorryyyy"... and they didn't know WHAT I was referring too).
what an absolute relief. Absolute relief!!!
You'll fix it, not to worry....try to picture it as a game with a time limit...lol. Seriously though, I hope you figure it out soon.
