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Author Topic: Epson 7900 from the inside - out  (Read 261050 times)
davidh202
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« Reply #1440 on: July 29, 2013, 03:54:27 PM »
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I wouldn't keep a woman as beautiful, waiting too long for a print   I would also be shooting more of her and less landscapes;)


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rvestal
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« Reply #1441 on: August 13, 2013, 05:40:17 PM »
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Wow, three days to read all 72 pages.....Massive effort for all who contributed, especially Eric.. What you have accomplished is nothing short of amazing.

I don't (yet) have a head clogging issue, but I may have a head replacement issue.  Thought I would post here so you would know the updated pricing from D1.

I've got a 5 year old 7900 and this weekend it started displaying a "Call for Service - Error Code 1A37" message.  According to the service manual, 1A37 is a thermistor sensor error on the print head.  Options are re-seat print head cables on main board and/or print head, replace main board or replace print head.

The estimate from D1, as of yesterday (13 Aug):

   Call Out $100
   Hourly Rate: $175, with a one hour minimum

   Main Board $495, plus labor
   Print head  $1,623, plus labor


Pretty steep; especially when I can get a new 7900 from B&H for $2,699, free shipping and no tax until the end of the month.

I'm leaning toward a new printer, but thought the group might be interested in the current pricing from D1 for out of warranty service.

PS:  If any one has experience with B&H's shipping of these printers could you comment?

Thanks. Randy

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Dan Berg
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« Reply #1442 on: August 14, 2013, 05:21:07 AM »
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$175 an hour.  Huh
What ever happened to the normal contractor pricing of 3 times the technicians hourly salary. (I am a contractor and that is how it is done around here.)
The tech might be making $30 to $40 an hour I doubt more. That comes to maybe $120.00 an hour.
I guess it's called no competition.
I called D1 when my 9900 was out of warranty just for some rate information and the conversation became somewhat contensious when I started drilling her on justifying their pricing.
We can only charge a little over double our craftsman hourly rate hear in se Pennsylvania. $45.00 an hour in our cabinet shop and this is the kind of craftsmanship you get for that money.
 We tried several times raising our hourly rate to $50.00 an hour and lost over 50% of the quotes. But then again we are in the middle of the Amish heartland.
Guess I am just in the wrong business.
« Last Edit: August 15, 2013, 12:24:25 PM by Dan Berg » Logged

Emma Brackett
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« Reply #1443 on: September 02, 2013, 06:24:01 PM »
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I'm having the exact same problem, I've been trying to fix for a week. Eric, how did you solve this problem!? I'm on a deadline, I'm dying of frustration and wasting so much ink... your response would make me over joyed.
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DanielH
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« Reply #1444 on: September 20, 2013, 02:44:58 PM »
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Just came to say that after nearly 6 months of research (and mostly waiting on epson to figure out how to manufacture enough printheads for their customers) I have successfully revived 3 printers (2-7890's, 1-9890) by replacing the printheads using this thread/ community and Eric's awesome video over at myx900.com 

So, Eric, HUGE thanks to you, Steve, and the community here for helping me along and demystifying these machines. 

I am now moving on to my 11880 which died today.  And after removing the head and cleaning I went from only missing 2 colors in nozzle check  to having none...Huzzah!! A new challenge...
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damian_ad
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« Reply #1445 on: October 12, 2013, 02:23:24 PM »
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Hey All.....

Like most I'll start by saying I have read every post, thread, comment and opinion from Jan 26 2012 when this first started until today. Taken me all of 3 weeks but worth every minute.

I myself have had over 40 of these wide format Epson printers over the past few years and that's just the X900 generation, if we included the 7800 and 7600 series then I dread to think how many we've had. Right now we have 5 x 7890 and 2 x 9890 (we have had the 7900 too but we honestly CANNOT see any visible advantage having orange and green.

Anyway, we have so many of these because of the amount of use they get, every printer prints roughly 60-80 metres of media PER DAY, so our machines don't have the issue of not being used enough. We tend not to have issues with the smaller 24" machines but we have the exact same issue over and over with the larger machines, it's ALWAYS the Light Magenta and Matte Black that block, and always in the same places too, it's about 50% of the nozzle that gets blocked rendering it almost useless.

So today after a few emails back and forth with Eric I decided to go for it and try and save myself some money. I had two goals here, firstly see If I can take apart one of the 9890, clean the head and put it back in and see what happens, if that fails then remove a head from a 7890, put that into a 9890 so then I only have to buy a new 7890 saving myself 2k ($3000) in the process.

Here's what happened, I stripped the 9890 down and got the head out.... This is what it looked like....



A mess....

So after cleaning off the obvious gunk I soaked in the Red Epson cleaner I bought from Gedat for about an hour, then syringed back and forth for another 20 mins or so, I could clearly see the jets were all spraying nice underneath, all looking good.

So I let it dry for an hour and placed the head back in..... No difference whatsoever.

So I then removed it again and this time went for a more forceful technique, I figured the head is knackered anyway I may as well treat it as a learning curve. So this time I hooked it up to some tubing and at the end of it a steam cleaner, I decided on this as a few companies I spoke with had said the only way to clean and dissolve dried pigment ink is with hot water. So distilled hot water in the steamer and let it do it's thing for about 10 minutes. All looking good so head back in.... And Voila.... The head is F****d... Fatal Error.

So anyway, I expected this, now onto my second goal, try and swap heads with a smaller machine, I removed the head from a 7890 (by now I have the dismantling process down to less than 15 mins), this one looked worse than the one above (I forgot to take pics, although I did video it), so I gave it a clean up and placed it into the 9890.... Two major things happened... Firstly when I turned the printer on it worked straight away, cleaning, nozzle checks and printing, not what I expected, I thought I needed to use this servprog.exe software to register the new head but NOOOO, I did not.... Secondly the head in the 7890 had about 7-8 lines blocked that had been blocked for a long time, after cleaning the face of the head the nozzle check is PRISTINE.....

So today I learnt 3 things....

1. I can take the head out of a 7890 and put into a 9890 very easily
2. I can clean the odd line caused by blockages to the front of the head (presumed).
3. Steam cleaning doesn't work

So now I have learnt how to easily strip these things down I am going to service them myself, I am sure with the state of the head you saw above which was from a printer only 4 MONTHS OLD that after a year it will be totally covered and blockages almost a certainty so maybe we won't need to buy as many printers now??? they normally last us about 8-10 months and seeing the head I can now see why.

Another thing I found was the software servprog.exe that certain people may or may not have got hold of covers the Epson 7700, 7900, 9700 and 9900 and NOT the 7890 and 9890 so I had to buy this from a certain not be named site for $50, and I didn't even need to use it (yet).

So from now on is my larger machines get a problem, I'll be swapping out the parts from a 24" one and save a fortune.... (why is the 44" version more than twice the price of the 24" version anyway???, they share the same electronics and printhead just a bit of extra metal and plastic in the middle).

A HUGE thanks to Eric, I wouldn't have even attempted this without the video (donation to the cause on it's way now), one thing to note is the 7890 and 9890 have an extra ground wire that needs disconnecting to remove the carriage and damper assembly, connects at the top by the 3 ribbon connectors (unless I missed it in your video somehow).
« Last Edit: October 12, 2013, 02:32:12 PM by damian_ad » Logged
damian_ad
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« Reply #1446 on: October 12, 2013, 02:35:51 PM »
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I am also seriously considering buying one of these.

I am thinking along the lines of prevention and not fixing.... If I remove the head every two moths, give them a good clean with this machine (not the ultrasonic method, just pumping cleaning fluid and water through it)...

http://www.aliexpress.com/item/printhead-cleaner-for-seiko-konica-xaar-epson-printhead/573824802.html

Thoughts?

Who knows maybe I should save the second head until I get one and see if it can also fix it?Huh (Dreaming too much???)
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BrianWJH
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« Reply #1447 on: October 12, 2013, 05:26:42 PM »
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Damian thanks for adding your experiences to this long running thread, given that each machine is printing about 4-6 rolls of media each day there's no case for low use being the issue with clogged heads, on the other hand paper/media dust build up might however be a factor.

I'd be interested to hear what your experience with the older generation printers, the 76xx, 78xx and 788x models was, did they clog as often, any particular channel colours that cause clogging issues?

Are you using genuine epson inks or 3rd party inks, are you using paper or canvas media or combo of both?

The head cleaning machine as you suggested might be a good investment in your case, extending the service life of a head by 6-12 months would be a substantial saving in your production environment.

Thanks for your efforts, makes interesting reading.

Cheers,
Brian.
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jferrari
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« Reply #1448 on: October 16, 2013, 01:51:07 PM »
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Congrats, Eric, for acquiring over 200 thousand views on this thread!
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BobB88
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« Reply #1449 on: November 12, 2013, 06:21:59 PM »
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Hi,

Has anyone successfully unclogged the 7900 yellow nozzle clog of death?

Thanks!
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davidh202
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« Reply #1450 on: November 12, 2013, 07:54:44 PM »
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You obviously have not read the thread from pg1...

so I'll save you a lot of time...

The answer is NO if it is a complete clog, and not just a temporarily dropped channel!

The only real useful purpose to this thread any more is Erics valuable link to his My X900 site where he goes into great detail in his videos as to how to REPLACE your head and wiper blade. and we all salute Eric for the effort he put in!  http://myx900.com


Unless your willing to waste a lot of time and ink don't bother to try and unclog it.
You will wind up replacing your head in the end, if you are willing to do the labor, and capable of taking on the expense of a new head 
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BobB88
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« Reply #1451 on: November 12, 2013, 08:25:51 PM »
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I appreciate your response.   I'll admit digesting all the pages has been a chore and I failed at it.    Interestingly I am familiar with you site and was about to contact you also.    I too applaud the work that Eric put into all this.  It was just wishful thinking that someone somewhere might have actually figured out the actual cause(s) of the clog, that is from an engineering point of view.  Like everyone else I'm frustrated by Epson's lack of response.   In fact I would suggest that they are guilty of somewhat of a fraud in not disclosing the caveats in owning a 900 series machine.   

Why hasn't  everyone grouped together to demand compensation from Epson?

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Eric Gulbransen
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« Reply #1452 on: November 17, 2013, 09:26:59 PM »
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Nope I'm not dead yet.  Neither is my 9900.  It isn't printing yet, which is a bummer.  But I haven't given up, which is not.


I've had a box staring me down from the center of a room I avoid like the plague.  It's the 9900 room.  If you walk through the kitchen on your way out it's like the 9900 doesn't even exist.  That box either.  Truth be told my 9900's been apart since the day I got that fateful "You're an idiot" message on the display.  If this journey has taught me anything, it's to never feel over-confident about anything related to clearing nozzle clogs on an X900.  But that day I screwed up.  I actually thought I had it beat.  When that message flashed at me it broke me.  and so it has sat..

What's in the box in the center of the room you ask?  A full set of cleaning carts.  Any more boxes in the 9900 room?  Yea, more of Epson's RED and CLEAR cleaning fluid.  Ok so I've avoided the room like the plague, but I haven't avoided spending more money.  What's the idea I've got brewing...?  it's interesting actually.


By now more than a few have contacted me through this forum and myx900.com, talking about clearing impossible clogs on their printer.  It's actually quite a lot more than a few, from basically all over the world.  Yes Alaska, and Africa, of course New Zealand, Japan which is ironic, and many more including even Brazil - which is sexy.  Yet no one has ever cleared an un-clearable clog, except one.  John Schwaller did it on his 4900.  How you ask?  I've mentioned this before - re-charged the machine with ink.  Did it a few times actually, which cost quite a bit, but not as much as a new head...

So I've been thinking since then, what if I set up a machine with cleaning carts filled with Epson's RED?  No ultra sonic vibration violations, no excessive pressures applied by manually forcing liquid through a head, no foreign chemical violations, and perhaps no frying heads from too many power cleanings.  Only worry is HAL's warning that nobody really knows how long you can expose an X900 head to RED.  The glue is the suspect weakest link in the "what will break down first" chain.  That nozzle plate comes un-glued from the chamber walls and 360 tiny nozzles just became one.  So I looked into it, with my microscope.

Turns out the glue on a nozzle plate, left exposed to pure RED for 24hrs straight, was not compromised in the least.  Over the course of this epic journey I have been sent a few dead/clogged/fatal error message heads.  I took the nozzle plate off one two nights ago.  I combed over the patterns of glue residue left in the shapes of chamber walls and cooling fins, I took visual notes of not only the appearance of the glue left over on the face, but also of it's consistency, how well it was stuck to the face, and how it reacted to my metal razor blade when I touched the two together.  Before RED or after, it's just the same.  This is very good news. 

I took all of my RED, filled each new refillable cart with it, and put them in this 9900.  Then I hit a temporary wall - one of the chips isn't being read by the machine.  I re-set it, still nothing.  And one of the carts doesn't seem to latch properly.  I'll have to chase down replacement parts tomorrow morning.  For now though, I am adhering to my self learned rule - no getting excited this will work.  However I do feel this has the best chance yet.
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iladi
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« Reply #1453 on: November 18, 2013, 11:09:56 AM »
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On signs forum there is also a guy who has recover an cloged epson solvent head by printing with specific cleaning fluid.
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Eric Gulbransen
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« Reply #1454 on: November 19, 2013, 11:20:40 PM »
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Could you give me a link to that thread iladi ?  I've searched unsuccessfully.
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iladi
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« Reply #1455 on: November 20, 2013, 11:09:56 AM »
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Shure:

http://www.signs101.com/forums/showthread.php?111350-Bringing-a-head-back-to-life!!!-You-have-to-check-this-out!
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Eric Gulbransen
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« Reply #1456 on: November 20, 2013, 11:35:24 AM »
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Thanks iladi.   Feels like we're getting warmer.  My replacement carts should be here any day now, then it's time to blow up this 9900!
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Eric Gulbransen
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« Reply #1457 on: November 20, 2013, 02:16:55 PM »
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If anyone is interested I put a ton of microscopic images with descriptions of our piezoelectric heads on the myx900 site HERE

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BobDavid
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« Reply #1458 on: November 24, 2013, 10:07:14 PM »
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Great video.
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davidh202
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« Reply #1459 on: November 25, 2013, 10:04:19 PM »
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WTF!
He is using a Roland solvent printer.
This has no relationship to an Epson Pigment Inkjet.

aren't we going around in circles here Eric?
On the very first pages of this thread you stated that buying refillable carts and trying to flush the head was a total waste of money and time!
  
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