Search:

Did you tried to write the image file? Because this will be write bit on bit.
And you can write the 4GB image file on 8GB sd card.

Check wires continuity from connector to connector.

What did you changed?

What machine is 7845 or EC7856? Send me mail = stoadis@gmail.com.

I have image of EC7856 sd card but it is 8GB not 4GB. EC7836 have the 4GB sdcard.

Check the chip connectors from machine for all four drums.

Authorization code software do you have is only for old black&white copiers/printers.
So why do you going mad?

Open the Front Cover

Switch off the Power Switch, then the Main Power Switch

With the Front Cover still open, switch on the Main Power Switch then the Power Switch

After the UI displays...

Who drives LPHs? Probably there you'll find defect source.

Check main drive assy gears.

In the old days, the technician learning the xerographic process, did not start with the replacement of parts

Send me mail = stoadis@gmail.com

1393894, 1437179, 1413246

There is bulletin for this defect = Rain Drops.

Before that try to change UI cable.

Set NVM location 711-188 = 2

Before that print the FRENCH Verbs page in yellow then cyan then magenta and black. Stop printer while printing and check image on drums. If these are ok next guilty part can be 2nd BTR. You can...

If it can copy from glass then problem is dadf unit.
You must check error codes

First step is to reseat all connectors and electronic boards from CCM and network controller.
Also check the fireware cable that links CCM and net controller.
It is good ideea to have disgnostic...

Check the nvm with machine nvm sheet.

What software version do you try to reload?

Most likely you need a service manual.

Do you think the printer have sensors for reading the media colours?

Try to see the image on drums and ibt as I said.

Yes you have right. Panic stop when print A3 size paper and check image on IBT. If image is NOT ok on IBT same procedure and check image on drums. If ok on drums then must check 1st BTRs or btr hvps.