There isn't anything inside of these units for someone that doesn't have access to parts to fix. Only trained technictians have access to any internal parts. However I think its the same wand as in the N500. It should have a long thin band that extends and retracts the wand, a couple hoses that supplies the self cleaning water and one that supplies the wand wash water. There are 2 nozzles on the top that do the bidet functions and one at the bottom that must be a drain? not sure, but when I plunged water through the wand and held the top nozzles closed, water did come out the bottom.