Hello good morning, again asking for your help. I have a copier ricoh aficio mp 201spf. and I need to change the developer, but some tell me that not only the developer is changed, nor the color roller, that only the entire unit is changed, is more than even the feet sold separately, that only the complete unit is sold , that is a doubt the other is that searching on the internet, if they sell the developer powder, and I know where to put it, but they tell me that you have to start it, but I don't know how, I know how to enter service mode with the clear modes and 107 and press the clear stop key for 5 seconds and now but I don't know what code to enter or how to enter it to restart the developer I hope you can help me in advance, thank you, and if you could give me an estimate of the cost of the complete unit, and the cost from the developer, thanks.