960K55081 is for the lower speed of the machine (7525/7530/7535).
For your machine you can use both 960K55091 and 960K55092, they are equivalent.
Thank you, Gabi.
I opened the backcover and found the one on my machine is 960K55091, can i use both 960K55091 and 960K55092, even 960K550081, any difference?
thank you very much for your reply.
What's MD PWB is that Motor drive printed wire board?
like this (below) ?
After check the code, i replaced the motor. But the code is still there.
Then, i changed K drum position. No change.
I also check the developer catridge. It's ok.
What's wrong with it. It just drive me crasy.
Thanks for anyone who knows that answer.