Reply to "Constant Voltage board"

gunrunnerjohnOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

Lou is, of course, correct Dave. Something is VERY wrong when that happens. My guess is one of the diodes that reconstitutes the PV voltage is bad, a simple fix.

To explain, in order to save a wire between the tender electronics and the locomotive, MTH uses the two motor leads and a pair of diodes to "regenerate" the PV voltage in the locomotive. If one of those diodes is bad, in one direction the PV voltage will go away. Since PV is used for the smoke heater and lighting, those will go away as well.

5/1/2011:46 AM

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