OK, time to take a break from kicking myself in the butt for this.
If you are working on one of these (if my model translation matrix is correct it is probably a Ricoh MP C2051) sometimes those machines make a really loud squeaking noise. Usually when the machine is pretty new, replacing the K PCU will take care of that. But this machine only made the squeaking noise when making color prints. So, I replaced all the color PCUs, but the noise was even louder. So I tried removing the ITB assembly (turns out that's a lot easier to do than it initially looked to me), rotated the ITB drive motor and the color transfer roller raising drive manually for a bit. When I reinstalled the ITB assembly, the noise was way quieter, and then it totally stopped.
So there you go, if you want to save a few bucks on parts like I didn't, you might want to try that.
Dang, this is going to sting for a while.
If you are working on one of these (if my model translation matrix is correct it is probably a Ricoh MP C2051) sometimes those machines make a really loud squeaking noise. Usually when the machine is pretty new, replacing the K PCU will take care of that. But this machine only made the squeaking noise when making color prints. So, I replaced all the color PCUs, but the noise was even louder. So I tried removing the ITB assembly (turns out that's a lot easier to do than it initially looked to me), rotated the ITB drive motor and the color transfer roller raising drive manually for a bit. When I reinstalled the ITB assembly, the noise was way quieter, and then it totally stopped.
So there you go, if you want to save a few bucks on parts like I didn't, you might want to try that.
Dang, this is going to sting for a while.