PS-2 3-VOLT BOARD QUESTION

Pin 1 of the 4-pin smoke connector.  It is not "ground" but the so-called PV or Positive Voltage (DC) that is indeed common to the lamps, couplers, and smoke heater.  MTH does not publish schematics of that board.

If you lose PV you can jumper a pin to restore it.  Did it a few months ago at MTH.  Will look at my notes tomorrow.

Stan and Jon,

Thank you both for the speedy reply.  I am in the process of making a jumper to try it out.  I will keep you posted.

Ted

Stan and Jon,

It works!  The strap will be easier than trying to solder on the printed circuit board, where ever it may be required.

Thanks again,

Ted

can you show us a picture of the board so we can all see your repairs it might help others. thank you so much

Alan

The PS2 board has 2 PV outputs.  One for the smoke heater and another for lights, couplers, etc.  If you lose the latter, jumper the black lead on the bottom of the processor board to pin 2 of the 12 pin connector, as shown below (red wire).  This is a one-time fix.  If you fry the PV line again the board will be permanently damaged.  The trace for pin 2 likely burned out if you still have smoke heat.  The black wire provides PV to the heaters but the trace was not robust enough so the black jumper was added to all PS2 3V boards.  If PV on pin 2 is dead, you can usually see a burned trace on the board.

thanks for posting the picture may help others!

Alan