Hi Walker and other members of the forum,
I come back with the continuation to the soap opera that has been going on with my printer.
If you remember on my last post, I mentioned the problems I have been having with my 9900 since an Epson technician changed the whole cleaning unit and the dampers unit. The printer was working fine before that.
Right after changing these pieces, I loaded the machine with a new set of carts filled with piezoflush. Right after, as I made the first init fill, a colour channel totally disappeared. As new power cleans, init fills were made, more colours started experiencing the same problems.
Following Walker’s suggestions, I filled the carts with piezoflush up to the top (to pressurize the carts fully) and made another init fill. No changes.
It is important to mention that some colours disappeared completely, 2 or 3 remained always good, and the rest were coming and going, intermittently. On one iteration one colour could be fully off (0% nozzles firing) and on the next power cleaning the colour was almost fully on (90 to 100% nozzles firing).
The main assumption was a defective cleaning station that was introducing air into the system.
Today, the technician came and he changed both the cleaning station for a new one, AND also the whole dampers unit. Then performed a few cleanings: results were the same, many colours missing and “jumping” nozzles on-and-off.
We then decided to see whether the carts I had been using for Piezoflush were defective… He installed a whole set of Epson inks (the carts were not full, but enough to perform 2 init fills). After the init fills, the results were the same (please see position 1 on the image attached to this post).
The technician came to the conclusion that, even if many misrifing nozzles seem to come alive and die again, the only explanation was a head malfunction. Because I was using not Epson inks, they could not cover the repair of the head, and therefore he walked away leaving me with a bill of 1000 usd and a monster paper weight in the form of a malfunctioning 9900.
What I did when he left was filling again my carts with piezoflush, topping them up completely, resetting them until they all read full, and making another init fill. When I performed the nozzle test, 6 colour channels were firing at 100%. In fact, 2 colours went from 5% nozzles firing to 100%. 4 colours still remained with 0 to 2% nozzles firing. Then I performed a power cleaning, and then 2 of those newly recovered colours saw again a number of nozzles misfiring.
You will find an image showing these three nozzle tests here:
At this point, I do not have any idea of whether:
- Could the problem be a defective head? If that is the case, how is it that some nozzles come and go?
- As the head was working at 100% before the change of the cleaning station and dampers unit, could this service have damaged the head somehow?
- Any other thing I could do before assuming my printer is dead?
- Suggestions, anybody?
I was right now starting my printing session for the summer, and was about to order new piezo inks for the 9900… I really want to solve this problem, if possible, before proceeding to ordering new inks. Otherwise, I might have to switch to my 9880 that I had as a backup.
I hate printers.
Thanks so much in advance Walker.
PD: Image attached showing the nozzle test right after the init fill with Epson inks AND right after having changed for the second time the cleaning unit and the dampers unit / Init fill with Piezoflush right after / Powercleaning right after.