White and black lines Kyocera M3550idn

[wolfcub]

Hello,

I have replaced the entire MK-3130 kit on my Kyocera M3550idn:

• Black Drum Unit [302LV93062]
• Black Developer Unit [302LV93080]
• Fuser Assembly [302LV93132]
• Separation Roller [302F909171]
• Feed Roller Assembly [302LV94270]
• Transfer Roller Assembly [302LV94130]

Unfortunately, even after replacing all the parts, the print still comes out with white and black lines as shown in the picture. What could be the cause?

Thank you.

[Ropariva]

Did you put it in “Developer” mode through Adjustment/Maintenance?

[wolfcub]

Yes, already done! Nothing works!😥 It was printing almost the same with the old kit that I removed.

[KdvA]

It is worth replacing the HVU / Engine PWB. This is located from the bottom behind the Duplex Section. This PWB has a lot of contacts that can cause problems. This PWB may be defective

[wolfcub]

Thanks for the advice, I tried reinstalling the old kit and the streaks are practically the same.