I'm working on a small AC/DC TV/VCR ,model SC309D, that only works on DC. Shorted power FET, open fuse, open fusable resistor, shorted zener. I think I have ID'ed all the bad parts, but do not know the zener voltage. It's really small... labeled 36A. D641. I don't have the schematic,, but suspect that it could be seeing up to 1.4x line voltage, not just 36v... I think the A stands for 5% tolerance grade, but wonder if the 36 is a cut-off 1N- number instead of the voltage.
TIA, Paul