How to repair electronic choke for 4' tube light?
Tried to repair to electronic chokes of 4' tube light but cdn't succeed. I'll be grateful if any one can provide a step by step guide with test voltages etc. at important points in the ckt. Already done/checked - Physical checking of any damage/burn marks etc., DC voltafe after rectification is OK, Filter capacitor after rectification is chkd OK, other electrolytic capacitors chkd. OK, one of the 13005 transistors was found defective - changed but no result, Voltages at the transistor terminals chkd and seem to be OK. May pls contact email@example.com