Fix for Epson R3000 Ink Dropping on Prints

A common problem with the R3000 after a couple of years of service are ink drops that start to fall on your prints. This is not due to a head strike, but actually due to with the PK/MK switch within the ink supply unit that gets blocked over time. After a while, especially if you use Photo Black (PK) only, such as myself, the MK line will block at the switch and then start leaking black ink.  This process will work for any other Epson printer with a PK and MK ink switch, i.e. 3880, 2880, etc.

One solution is to switch to MK and then cut PK cartridges to fit into the MK hole – but this is hardly satisfactory. Another solution is to replace the entire ink supply unit, but this costs about 200 EUR and is labour intensive.  A final solution that I have tried (and works!) is to perform a complete line clean on the R3000, using refillable cartridges. The total cost is going to be for a set of refillable cartridges (~25 EUR), some flushing liquid (~25 EUR) and a set of cartridges (2 x PK + MK, i.e. about 100 EUR). Note that the cost of the cartridges you will require anyway, if you do perform an ink supply change.

Here is how it works:

  • Ensure you have a couple of days where you don’t need to print and a set of PK and MK cartridges in the printer at least 50% full, and as a minimum one new set at hand.
    • The 50% full ink cartridges will allow you to perform the PK / MK switch if you have a problem with your refillable cartridges.
    • You will need at least one new set of cartridges to recharge the lines and the supply unit. I would recommend two as a minimum.
  • Buy a refillable R3000 cartridge set and solvent cleaning set. I recommend the following (or similar):
  • Load the PK and MK cartridges with cleaning fluid. Load them into your printer. Store the original PK and MK cartridges in plastic cling wrap, making sure that you have covered the ink outlet holes and the whole cartridge.
  • Perform multiple ink changes between MK and PK. This will charge your PK and MK lines with the cleaning fluid. I would do this for a whole refillable cartridge capacity. Reload them and perform the switch again.
    • Perform intermittent print head checks to see if the lines are being flushed. You should see the full black head starting to get lighter and lighter until it becomes transparent (for PK and MK).
    • Open a word processor and print a page full of full black. You should see the print getting successively greyer and greyer. It should be somewhat grey at the end (due to the R3000 mixing other greys to print black), so remember to use the print head check to verify it is fully flushed.
  • Wait for 2 days. Switch to the other black ink. Wait for another 2 days. (i.e. leave the switch on each black colour at least 2 days on the cleaning fluid).
  • Perform another print with the word processor on full black. It should now be clean.
  • Unwrap the real PK and MK ink cartridges. Reload them into printer and perform a switch between PK and MK to charge the lines. Note that you will need about 20ml of ink to recharge the lines and r

At this stage, the R3000 should now be fixed and no longer be dropping ink. Change to new PK and MK cartridges when ready.  Congratulations, you have just saved your printer! (Well, at least it worked for me …)

p.s. Do NOT use the syringe directly into the feed line — even though this may be recommended on some sites. This is for small format printers only, and if you do this, you may blow the lines into the supply unit permanently damaging the R3000.

Before Fix: Ink drops on prints due to problem with PK / MK switch. These are not head strikes.


After Fix: No more ink drops on prints!