» Google Translator

» November 2014

26 27 28 29 30 31 1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 1 2 3 4 5 6


» Log in

User Name:


Not a member yet?
Register Now!

» Today's Birthdays



Results 1 to 7 of 7
  1. #1
    Join Date
    Jul 2011

    Clogged head Mutoh valuejet 1204 (I think)


    I am having some questions for the pro's here ;)

    I have a Mutoh Valuejet 1204 and we do not use the machine very often here. The first months I let the printer always on standby, but I calculated that if I do not print anything it will take about a half year to run out of ink by cleaning cycles only (1/24h / eco mode).
    So I decided to turn the printer off when not using it. Now that was a bad idea, because now when I want to print something I get banding in the black and the cyan colors. I already did a lot of cleaning cycles, but that does not help. I think the head is clogged.
    Do you have any suggestion to remediate this?

    I also would like to have a service manual of the Mutoh if anyone has it.

    Thanks a lot!


  2. #2
    What does your nozzle check look like?

    If you are missing nozzles you probably want to try "head soak".

  3. #3
    Join Date
    Jul 2011
    Hi Randya,

    Thanks for the quick answer! Yesterday I tried the head soak by putting lint free cloth with cleaning solution on it under the head, and there is some slight improvement, but there still remains a line in cyan parts printed and A nozzle check reveals some missing parts in black.

    I ordered a syringe and a bottle of cleaning fluid and want to try to clean the head by putting the syringe on the damper inputs. Now I am looking for instructions to remove the tubing from the damper. Have you ever tried this method?

    I have searched everywhere for a service manual but cannot find it via google.

    Thanks a lot!


  4. #4
    The LAST thing I would recommend is trying to push solution through the head.
    You can easily damage the piezos and/or blow out the dampers.

    You want to pull.
    Head soak, and pull a vacuum on the bottom of the capping station.
    Last edited by randya; 07-21-2011 at 07:29 PM.

  5. #5
    Join Date
    Jul 2011

    The reason I came up with the solution is because of the instructions found on this page:

    Especially this part:
    Print quality issues

    Problems occurring with Print heads drying up and causing blockages to the nozzles, this does not necessarily mean installing a new print head which is costly and may sometimes be unnecessary to do. An easy fix and solution to this problem is detailed below:

    With the carriage locked in home position and the heads capped.
    Take a clean syringe, and fill it with a clean solvent solution.
    Attach a male adapter to a syringe, (used to connect the pump tubing), as this fits perfectly into the top of a new damper.

    Carefully remove the damper from the troubled print head, with the syringe attached to the new damper push onto the manifold on top of the print head. Gently push the plunger on the syringe, until you can see the blockage clearing from the print head through the tubing that connects to the pumps. Be careful not to apply too much pressure there are filters in the actual head and to much pressure can cause issues. The same thing can be done by connecting the tubing from the syringe directly onto the manifold this should only been done once you have experience of doing this.

    Do this until the solvent becomes clear going through the tubing of the pump. It can sometimes take a couple attempts. If the solvent goes through to the pump tube you can be sure that the manifold, head, capping station and pump are clear of any blockage. If after a couple of attempts nothing is happening you need to isolate where the actual blockage maybe.

    This can only be done with the heads disengaged from the capping station. Once the head is uncapped ensure the printer is switched off and the power lead is removed this mainly applies to the large format printers and not the Grand format. This is to avoid any possibility of causing problems to a main board if you disturb ribbon cables that plug into the print head.
    Move the carriage to a comfortable position to work on and place lint free material under the print head to catch the solvent. With the damper removed attach the syringe to the print head and gently push you should feel no resistance and the solvent should jet out of the bottom of the head. Look at the base of the head whilst doing this and you should see a nice curtain of solvent from all the nozzles. If this is good move onto the capping station.

    On the capping station, disconnect the tube at the pump end place some lint free material on the bottom of the tube and using a pipette place some solvent on the cap after a short time this should drain away. If it drains away move onto the pump.

    Place the syringe onto the pump tube and gently push this should push the solvent through to the waste bottle.
    When doing this always complete the process as quick as you can and never walk away and come back. Because the carriage is not capped leaving it uncapped for a long time could cause other heads to dry up and become blocked. Also if you are unsure of any of the above process do not attempt it, get an engineer to check it for you.

    They also sell equipment to do this:

    Do you think that's too risky?



  6. #6
    Very LAST thing I would do.

    I mean if you are going to buy a new head, there is nothing to lose.

    Otherwise, pull through the cap. IMHO.

  7. #7
    Join Date
    Jul 2011
    I would suggest that you do another head soak. I just completed my first the other day with amazing results. Crack open a cleaning cartridge and let it sit over night. Good Luck!

Similar Threads

  1. Mutoh ValueJet 1204 Shut Off?
    By schoensigns in forum Mutoh
    Replies: 5
    Last Post: 03-17-2012, 02:40 PM
  2. How to remove print head ValueJet 1204?
    By Signsforwhile in forum Mutoh
    Replies: 15
    Last Post: 04-27-2011, 03:27 AM
  3. Mutoh ValueJet 1204 - preferences?
    By tommythesignguy in forum Mutoh
    Replies: 1
    Last Post: 04-21-2011, 03:50 PM
  4. Mutoh ValueJet 1204 InkNearEnd
    By Kemble in forum Mutoh
    Replies: 7
    Last Post: 09-26-2010, 03:17 PM
  5. Mutoh ValueJet 1204 (HELP)
    By greglauter in forum Mutoh
    Replies: 19
    Last Post: 09-25-2007, 06:36 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts


» Search for Fonts at Signs 101

Looking for fonts? We highly recommend MyFonts.com


» Search for Clipart, Fills and Digital Art at Signs 101

Search for clipart, fills and digital art at ExpressClipart.com

Keyword Search  
  Advanced Search


Powered by vBadvanced CMPS v4.2.1


All posts and other information available at Signs 101 should be viewed as the opinion only of the poster. No claim is made that any information is accurate. As such, each reader should not rely on any information available here as accurate and should independently verify such accuracy. In addition, no claim is made that posts made here will be free from profanity, obscenity, rude, hurtful, libelous or insulting opinions of the poster. Such posts should, however, be reported to an Administrator for review.

Neither the owners, employees, officers nor directors of Signs 101 shall be held responsible or liable under any legal theory for any loss or injury resulting from any post, information made available, policy, action or lack of an action at Signs 101. Your use of this website is your acceptance of these terms and conditions of use.