[Electrical] 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]

Re: OKI C822dn only print blank pages

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]

Re: OKI C822dn only print blank pages

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

Ah, this is the mainboard, ok found it

[Jackson0]

Re: OKI C822dn only print blank pages

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