Bizhub 350 light/fayded area on copies

[chejay127]

My bizhub 350 prints a faded/light copies on some areas of the paper sometimes a white straight line across. I have just replace the mag roller collar on both sides and it did work. But after some copies problem came back again.. mirrors are all clean, glass is clean & drum is new. Is it time to change developer? if so, can someone teach me how? Should I run F8 after changing its developer? thanks you masters!

[Hansoon]

How many copies on the developer and drum?

Hans

[chejay127]

I bought the machine from a friend sir, I haven't change any of its parts except for its drum. Can you teach me sir how to change its developer? i mean the proper way, I don't have its manual.
my other bizhub machine has also a problem i already open a thread about it but still no luck.. T_T

Bizhub 350 no display, only orange print button light