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Author Message   Aaron Rating: N/A Votes: 0 Posted on Wednesday, July 07, 2004 - 08:55 pm:    Thanks Shel, there are no copper traces. I guess if there were copper traces the resistance would be considerably smaller. I have soaked the tiny PCB in a mild solution of caustic soda overnight and the trick works. The PCB is now normal. Now I notice that the CdS cell might be aged. At total darkness the meter shows a small reading. Any ideas? Does the cell needs renewal? Any tips on choosing a replacement CdS cell?