> Back in my working career circuit boards were repaired. Now it is just replace it. are people getting dumber , or are they just too compilated now days?Our shop had a couple electronic guys. I could never do it. Stan
Good question, Stan. In a previous life I fixed circuit boards. In fact, I designed hardware and software for circuit board testing and fault diagnosis. These were for military weapons systems; the boards were expensive and designed to be repaired. I could probably figure out what's bad on my furnace's control board, but my time is worth more to me than the hundred bucks a replacement board costs.
There are a lot of reasons circuit boards aren't commonly repaired these days. As circuit density increases, the ability to repair gets more difficult. It was hard enough to replace components on single layer boards and it takes real skill to desolder and replace components on today's multi-layer boards. Documentation is usually hard to get; if you don't know how a circuit board is supposed to work it's difficult to troubleshoot it. Specialized components may be difficult to obtain, and in the case of microcontrollers if you don't have the firmware there's no way you can program a new microcontroller.
The bottom line is if you can buy a replacement circuit board at a reasonable price, it probably doesn't make sense to try to fix the old one.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let�s make one more addition to our series on hydraulics. I�ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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