At 11:57 AM 5/23/2010, Loren Busch wrote: >Welcome to the club. My '90 has been telling me the water tank is half full >(middle yellow LED) for a couple of years now no matter how full or empty >the tank is. Played around with the float and tried to see what was going >on with the reed switches last time I cleaned out the tank, no clue on what >has failed. So I live with it, to many other nickel and dime projects to >deal with. Loren, we can solve or at least diagnose that without much difficulty. Short answer: If you unplug the sender and the yellow light stays, replace the left-hand LM324 with another from Radio Shack and your worries will be over. The easiest way to remove the chip is to clip the leads with a small pair of dykes and then desolder the holes individually. No shame, even the pros do it this way -- in fact there are special cutters made for the purpose. Dremel with cutoff disk would be another good way -- just run it along the top of the leads where they flatten out to dive into the epoxy covering. Chip costs a couple bucks. Soldering advice on request. d |
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