Why is it that my konika mainolta shows me that replace imaging unit black soon and yet i have ink in the machine

The charge corona housing in the image unit replace it with a new one. Its the assy with the two blue/green hooks on the right side of the machine when you open the right side door

Have you replaced the image units and toner units with OEM parts

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reseat the image unit or have the image unit replaced normally done by replace the drum and developer

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

Replace the transfer belt.

If the machine is just using magenta, yellow and cyan to make black then you get brown, not black, (that why you have a black image unit, because YMC will not make black, color system issue. unless the machine is using yellow,magenta, cyan, then black. Are you using 3rd party toner or OEM cartridges? Did you replace the cartridge before it was required?

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

Imaging units have a limited life span and sounds like yours is getting to the end of it. Sooner or later the printer will stop and demand image unit replacement.

What color? replace that image unit

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

Why do you need a Power supply? Neither codes deal with that. The 6751 is dealing with your scanner CCD which is located under the big glass on the right side that large black item. It could be bad or needs a alignment, the second deals with the Black image unit and or toner for black using 3rd party????? or OEM toners. Replace both he black image unit and black toner using OEM not 3rd party. As for jamming where does it jam? When was the last time the draw rollers where clean and or replaced? When was the last time the machine was cleaned, Gradation? and Registration? test done. Image units toned up? High end copier likes this needs to be keep up!!!!!

As for the imprints replace the FUSER UNIT (HOT PART) What color Ink bleeds replace that color image unit.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

please replace your image transfer belt unit

(konika minolta c350)

Abnormally high toner density detected Black TRC sensor-

1. Correct the TRC Connection on the underside of the imaging unit if faulty
2. Reinstall black image unit
3. Change image unit
4. Change PWB-M
5. Change PWB-MFP

you can try # 2 then run 20-30 sky shops (copies with lid up to make black copies) put a white piece of paper over lead edge section of copy glass so you are only making 1/2 black copies if you don't the copy may jam in the fuser due to excess toner. after running copies turn machine off for 10 secs to reset and power backon. if problem continues I would change the image unit.