C3110 error 6790

[allan]

That white strip looks ok. So like BC said look for a CIS or scanner section.

[Bix]

Hi, I had a problem with a ground connector that was not properly inserted. Hard to see until you take it all apart.
When the printer turns on, check the white bar. One cause could be the presence of too much light but I doubt.
Be careful when changing the unit. These machines are very delicate.


Good luck

[c3110]

Ok so I think I can safely declare this machine dead or at least too expensive to fix.

So far I:
- Cleaned the glass on both sides
- Cleaned the LED array
- Cleaned all elements in the scanner unit
- Checked all connectors, cables, grounds
- Checked and even replaced the flex band
- Checked the belt
- Checked the white strip, it's ok
- Updated firmware to last version

Called locally to see if any parts available, scanner unit and\or mainboard but unfortunately not available.

Photo album - LINK

[kingarthur]

Had this in a C3350, luckily I had a scrap machine, swapped over the complete scanner

[allan]

If you have another C3110 available you can test the scanner unit.

[c3110]

Ok, I managed to order a new CIS assembly unit. Will wait until it arrives and see what happens.

[allan]

Ok so it will live?

[c3110]

We'll see when I replace the CIS assembly.

Sent from my Mi A2 Lite using Tapatalk

[c3110]

Unbelievable!

Replaced CIS scanner unit today with original new part..........SAME ERROR!

I'm gonna do this with this piece of junk - YouTube