OKI C822dn only print blank pages

[Jackson0]

Hi,

my printer only print blank pages since cleaning the four LED head unit ribbon cables on the mainboard. Unfortunately under voltage. Before that he prints with stripes.

Maybe a fuse is gone, have somebody an idea or a Schemactic for this model?


Regards,
Jackson

[Quatro]

Hi,

my printer only print blank pages since cleaning the four LED head unit ribbon cables on the mainboard. Unfortunately under voltage. Before that he prints with stripes.

Maybe a fuse is gone, have somebody an idea or a Schemactic for this model?


Regards,
Jackson

Hi.

Check F501 at the soldering side of CU/PU.

f105.png

Hope this will help

[Jackson0]

Thank you! Can you tell me where I can find the CU/PU Board?

Ah, this is the mainboard, ok found it

[Jackson0]

I think the circuit diagram is not from a C822 printer, I could not find the positions indicated.
But while searching I found various small SMD fuses and F16 (near the USB socket) was actually defective.


Now the printer runs again as before and has many stripes, see picture.


I have already cleaned the LED head units including the ribbon cable, what else could be causing the stripes?
WhatsApp Image 2024-01-14 at 21.37.33.jpg