Epson 4900 clogging VLm chanel suddenly

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1

Hello,
I would like to hear your opinion about an Epson Stylus Pro 4900 which has one of the Vived Light Magenta channels stopped suddenly during a nozzle test, first half-present after completely disappeared. I made some “pawerful” cleanings of the couple Vlm / Lc following the printing of purge pages of the channel concerned without succes. Then I made “initial ink charge” via the program service without result. I cleaned the capping station without sucking too.
I have this printer for 4 years and a half, still printing a bit every two days, the number of pages on the meter is 3818p. For the information I also noticed that the weight of the cartridge of the concerned channel VLm is not moved after the procedure of “nital ink charge” (measured with a balance of 0.01 g of precision before and after the procedure). Do you think it is a problem of dumpers or capping station or rather the head of the printer.
Thank you for your opinion and excellent day
excuse me for my bad English :slight_smile:

cordially
Vladimir Vasilev

2

Most likely this is a damper/capping station issue but if you print with the channel in this state it could become a permanent head problem.

First thing to do in this situation is to replace the cleaning assembly (capping and pump) and the damper unit together.

-Walker

3

Thank you very much Walker for your answer. Okay for the capping station. I’m going to change it. You also mentioned a pump. Is it included in this unit or should I buy it separately?
Are there any special adjustments to make after changing the capping station and the unit dumper assembly.
Thank you very much for your advice.Are you have a web link were I can buy this original parts?
Thank you and have a great day.
Vladimir

4

Capping/Pump is all the same unit.

No special adjustments needed

compassmicro.com has the parts (call them).

best,
Walker

5

Hi Walker,

I just change the dumper unit and the IS Unit,after intial charging of ink i ve got the same problem the Vlm chanel is empty,all others are ok.What can i do inject the piezoflush direct in the head or ultrasonic ss cleaning.
Thanks for your help
Vladimir

6

Here is the Vlm chanel for the last time when it works after two pawerful cleaning desapear completly.IMG_20180126_135449

7

I also suggest one last last thing. Re-prime your VLM cartridge. There may be a stoppage at the cartridge outflow.

8

Yes I do it before…I changed completly the Vlm cart…aways the same probleme.Are you think it s a nozeel cloogs or the head is completly dead.
Thanks for your help
Vladimir

9

Most likely at this point the head has been de-laminated. :disappointed:

-W