Tach Reader in 5 Volt PS2

CharlyOGR Forum Member

Having issue with speed control on older 5 volt ps2 engine, board is fine on test fixture but fails in engine. Have ruled out all wiring through continuity testing, etc.. Only anomaly is 10k resistor on tach reader line from board. Is resistor necessary, engine is 30-1247-1 steamer. Any help appreciated.

3/11/183:00 PM

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