Hello,

if coffee is weak, the grinder is worn out. In this case it has to be changed, cleaning of the grinding cones isn‘t enough they have to be changed, better the whole grinder, because from Jura there are no new original cones for sale without grinder.

Is the coffeeground really totally DRY?

Make own Video with the noise. This one shows no noise AFTER a rinsing process and isn‘t compatible to your fault description.

BS

Hello,

there seem to be a lot of problems.

First, no dry coffee grounds should end up in the grounds container:

Cleaning the seals in the brewing unit is by no means sufficient; they must be replaced—especially the seals of the drainage valve, the vacuum pump, and the brewing pistons.
It must also be checked whether the locking pawls of the brewing unit are still functioning correctly and whether this is an issue:
Jura Brüheinheit steht nach dem Einbau nicht exakt in Grundstellung - Brühkammer nicht mittig unter Pulvertrichter

Additionally, you need to check that the drainage valve actuator extends and retracts correctly, doesn't stutter, and doesn't occasionally "get stuck" somewhere.

Then to the grinder:
You have to make a choice (in German we say: one dead you have to die) – either a perfect grinding result, or trying to save money with cheap, inferior replacement parts with a rather mediocre overall result.
Which millstones were installed exactly? Please provide a picture or link (I'll delete the link if necessary). Also look here:
Aroma+ Mahlwerke - in Ersatzteilshops angebotene "kompatible" Mahlsteine (Mahlring/Mahlkegel)

And the picture of the bean feed propeller shows me that the grinder has already processed many coffees – probably well over 20,000
(I have seen machines with 35,000 brews that were less worn, but it also depended on the hardness of the beans used).
The conveyor plate in the grinder should also be checked, as a single blockage (even has happened in the past) very often damages the conveyor blades. In that case, the coffee grounds will no longer be sufficiently transported out of the mill. Post a picture of the conveyor plate here so it can be inspected.

With Aroma+ grinders, it's relatively common that they can't be properly adjusted with heavily worn burrs or others than the original ones – either always too coarse or always too fine. If that's the case for you, there's not much you can do. If it's always too coarse, you can find 3D washers somewhere online that fit between the grinding cone and the feed plate, but that's more of a makeshift fix than a proper repair.

The adjustment markings on the grinder are no longer valid for heavily worn or replaced grinding stones. The grinder must first be properly adjusted, and then the adjuster with its stops inserted – otherwise, as in your case, further adjustment is impossible.

BS

Hello,

even if the grinder ist bad - the coffee ground may not be complete dry in the tray.
This problem should be fixed befor buying a new grinder!

BS

Hello,

I mean the feed plate – that's the part the grinding cone sits directly on. In your picture, it's been removed along with the grinding cone.
Jura E8 (G2) - Aroma G3 Mahlwerk Revision

Is the coffeeground totally dry or is it moisturizes.

That's definitely far too little coffee grounds. If you're making a two-cup brew, the brewing chamber needs to be at least four-fifths full.

Remove the toothed ring from the burr grinder and the grind adjustment knob, then adjust the grinder so that the brewing chamber is filled to the correct level when brewing two cups. Then check if the grind is still correct. If it's significantly too coarse, forget about the burrs and buy a new complete grinder. These are already factory-adjusted – there's nothing to do, just install them.

BS

Hello,

if Jura customer service recognizes that you had hand on the machine, they refuse the repair flat rate and repair according to effort. That may cost much more than the flat!!!

If ALL on the machine is unconspicuous and original (e.g. no screw false or worn out, every hose is in age appropriate, grinder is in original condition…) you can give it to Jura.
Otherwise, I wouldn't dare to send it to Jura, as the likelihood of the flat-rate repair being rejected is very high, and if you want your machine back without repair, you have to pay the cost estimate. This is in Germany about 80€ to get the machine back - AND it may be it isn’t assembled properly and/or is incomplete!
Our forum member Baldur had this experience. And it will be nearly impossible to prove to customer service that the machine was properly assembled and complete beforehand.

BS