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.
thank you very much for your reply.
What's MD PWB is that Motor drive printed wire board?
like this (below) ?
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?
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.