I am trying to disassemble the front of the unit to clean some fluids that got leaked into it. I removed the cover and all the screws on the front circuit board without difficulty but am having trouble getting the front circuit board to release from the front face plate so that I can get into that area and clean. I cannot find a schematic doing google searches so that I can see what else is holding it in place. Anyone have any experience with this unit or know where I can access a diagram? How about a walkthrough disassembly of the front circuit board and face plate?