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Lionel ZW Transformer Issue
Steven writes:
“Hello, I just purchased a ZW transformer over Christmas and got it running. It worked great on all 4 throttles. Then there was a derailment and now D-U doesn’t work but A-U, B-U & C-U still work fine. I took off the cover and everything looks in good shape however I did smell a slight odor; not sure that is normal or associated with the short (train derailment). I measured the resistance on A-U and I get 236 ohms while I get OL on B-U, C-U and D-U however D-U is the only throttle that doesn’t work. Any help you could provide would be greatly appreciated.”
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You may want to consider buying Greenberg repair manual which covers post war lionel trains and transformers. See if there are any youtube videos on the ZW transformer.