I need a wiring schematic for a heat pump. York I think but can find no tag or label. It is marked model HP036X1021A. It has a circuit board (pn 031-09104-000 from Source HVAC Parts). The original drawing has weathered to the point of being totally unusable. I found a drawing in an earlier post by the same model number without the "A" at the end but it does not show the circuit board. Thanks for your help.