Canon IPF 8400 bringing back to life

dwightt

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I picked up a IPF8400 printer that has sat for two years unused. I am fighting some errors that I need your input on.

I have put two new heads in the printer. But the printer still asking for a new Right Head.

I have installed new ink for all the colors.

The lines for the right head are empty if ink, the left lines are full of ink. Don't know why unless the purge unit is bad. How do I test that?

I am now stuck at " Absorbing ink please wait" on the screen. It remains here for a long time. I cant stop it. I have to pull the power plug to get out of this. However it returns to this when I start the printer again.

In Service Mode I can't do any test prints. It will do a Nozzle test.

Any tips and help will be greatly appreciated.

Thanks

Dwight
 
I picked up a IPF8400 printer that has sat for two years unused. I am fighting some errors that I need your input on.

I have put two new heads in the printer. But the printer still asking for a new Right Head.

I have installed new ink for all the colors.

The lines for the right head are empty if ink, the left lines are full of ink. Don't know why unless the purge unit is bad. How do I test that?

I am now stuck at " Absorbing ink please wait" on the screen. It remains here for a long time. I cant stop it. I have to pull the power plug to get out of this. However it returns to this when I start the printer again.

In Service Mode I can't do any test prints. It will do a Nozzle test.

Any tips and help will be greatly appreciated.
I do have some specific advice at the end, but first some observations are in order.

I'm sorry to say it, but it sounds like this may be a good example of why one shouldn't buy a used printer unless one has first turned it on, connected it to a computer, and used the computer to make it print a complete and correct nozzle check.

Two new heads cost what, about $600? New ink for all the colors, using the smaller of the ink cartridges this printer uses, would cost about $2000 at B&H. So for $2600 plus anything you may have paid for the printer itself, you have a printer that's between six and ten years old, that may never work. Maybe you got the printer itself for free, and the ink on eBay for half-cost. That's still $1600 spent with no idea whether you can--much less how much cost, time and effort it would require to--make the iPF8400 print. Currently a brand new Pro-4100 (the iPF8400's two-generations-newer successor) is $4516, and it would come with as much ink as you've bought for the iPF8400.

It is entirely possible that one or more logic boards inside your iPF8400 may need to be replaced. That would run a real risk of more good money going after bad.

The advice

If the printer was sold to you as working, think about whether you can return it and get a refund--and maybe even present a claim for the money spent trying to make it work.

If you can find a Canon printer tech who can examine your iPF8400, even for a few hundred dollars, that's probably your best move at this point. Not many people here are qualified to give you detailed advice.

Otherwise, you might want to look for basic, inexpensive things you can do to try to make the printer work. Occasionally problems are as simple as a loose or dirty electrical connector. Any place things plug together should be checked and, if practicable, cleaned.

You might want to look for a physical reason why the lines for the right head are empty. Is there a discernible clog somewhere? Can you observe any differences between the lines that filled and those that didn't?

Hopefully that or what someone else can suggest will get the printer working. If not, then more generally, think carefully about at what point it makes more sense to give up and consider this an expensive lesson learned, instead of plowing more money and time into something you may never fix.
 
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I picked up a IPF8400 printer that has sat for two years unused. I am fighting some errors that I need your input on.

I have put two new heads in the printer. But the printer still asking for a new Right Head.

I have installed new ink for all the colors.

The lines for the right head are empty if ink, the left lines are full of ink. Don't know why unless the purge unit is bad. How do I test that?

I am now stuck at " Absorbing ink please wait" on the screen. It remains here for a long time. I cant stop it. I have to pull the power plug to get out of this. However it returns to this when I start the printer again.

In Service Mode I can't do any test prints. It will do a Nozzle test.

Any tips and help will be greatly appreciated.

Thanks

Dwight
Dwight, as was said it may or may not be a lost cause, lets hope, it's only a technicality.

I have an 8400 I bought used but it was printing its last jobs as we unplugged it and loaded it up. My only advice, and since you didn't mention it, that you have not talked to Canon. Call Canon PRONTO and speak with the LARGE FORMAT PRINTER division. Those guys know a lot about that printer and trouble codes etc.

Too bad the last owner did not keep it plugged in. With power to it, the 8400 will just sleep and wake up whenever its brain tells it to and do whatever it needs to do then go back to sleep! If you have a power outage always make sure you turn the printer back on. Anyway I don't have any advice since I've never had any problems. If you can get it sorted out it's a magnificent printer. The first time it spits out a 42x72 print it's like watching a big wet print come to life in the developer!!! Good luck John
 
Thanks John for your positive and not in my business response, unlike the last person's response. I have been impressed by Canon printers having cut my teeth on six Epson large format printers. I thought my experience with them would help with this printer. It only has 600 prints on the clock and thought it would be worth getting back into operation.

Canon support? I did not think about them since this printer is not under warranty. Is there a cost associated with talking to them?

I did get the Absorbing ink error fixed, needed the ink tank covers shut. I also did a leak test on the ink lines and they were fine. Also was able to draw ink through the lines when the lines were open. So I will check on other things that can cause the issues I am seeing.

Dwight
 
Interesting, Mike Lee this Sunday on Jose Rodriguez's show talked about electrical contacts as printers age.
 
Thanks John for your positive and not in my business response, unlike the last person's response. I have been impressed by Canon printers having cut my teeth on six Epson large format printers. I thought my experience with them would help with this printer. It only has 600 prints on the clock and thought it would be worth getting back into operation.

Canon support? I did not think about them since this printer is not under warranty. Is there a cost associated with talking to them?

I did get the Absorbing ink error fixed, needed the ink tank covers shut. I also did a leak test on the ink lines and they were fine. Also was able to draw ink through the lines when the lines were open. So I will check on other things that can cause the issues I am seeing.

Dwight
Dwight, i'm glad to see you making progress. Yes, the Canon large format division does indeed exist and as with all Canon Tech, as far as I know, is always FREE! The # to LF is 800-423-2366, they've never let me down. I love my big printer. Sometimes I toy with the idea of the printer that holds the TWO rolls simultaneously and I think also has rear feed for rigid materials, can't remember. Just for your info I get all my inks on eBay. I've gotten the 330ml tanks, new, for as low as $35! Keep in mind that according to Canon tech it doesn't matter how old or expired the ink is, it's still just as good as new. Lots of luck and keep us posted on the progress!!! John
 
With my printer still giving me a Right head error, I am lookin at it being a bad board or a ribbon cable contact issue. I have seen just cleaning up contacts fixing problems.

Dwight
 
Thanks for the number to Canon. I gave them a call. They were friendly but could not help me out much. They stopped supporting the 8400 a little over a year and a half ago. They directed me to call some local service companies to have them look at the problem. The first shop I called left me feeling like nothing is going to work with them, the rep did not know if they even supported my printer.

However the person at Canon thought I was dealing with a bad board. This could explain the issues I was having with every head giving the same error. Here is a clue that I saw, twice the printer ran normally all the way up to a nozzle check. That tells me there could be a connection issue between the board and the head that sometimes works. I will have to dig into the connections from the head to the nearest board and see.

Last night I did a manual fill of the right ink lines all the way to the head. The ink remained in the lines all night. Today in service mode I tried to get the printer working and the inks slowly started to empty the lines. If the head is not firing, does that not provide some of the low pressure to keep the ink in the lines? I think the issues are related.

On to more digging.

Dwight
 
Good luck. I've never brought back a printer that complex, but I don't like giving up on a printer, either.
 
Thanks for the number to Canon. I gave them a call. They were friendly but could not help me out much. They stopped supporting the 8400 a little over a year and a half ago. They directed me to call some local service companies to have them look at the problem. The first shop I called left me feeling like nothing is going to work with them, the rep did not know if they even supported my printer.

However the person at Canon thought I was dealing with a bad board. This could explain the issues I was having with every head giving the same error. Here is a clue that I saw, twice the printer ran normally all the way up to a nozzle check. That tells me there could be a connection issue between the board and the head that sometimes works. I will have to dig into the connections from the head to the nearest board and see.

Last night I did a manual fill of the right ink lines all the way to the head. The ink remained in the lines all night. Today in service mode I tried to get the printer working and the inks slowly started to empty the lines. If the head is not firing, does that not provide some of the low pressure to keep the ink in the lines? I think the issues are related.

On to more digging.

Dwight
Hey sorry Canon couldn't help. And you're way beyond any of my expertise. When I need hardware help, you'll be the the first one I'll call, by then you'll be a tech. LoL!!! Does LexJet only handle papers and inks or do they do any tech services? You can also join and ask at the printer forum at Luminous Landscape. They have a few very knowledgeable printer guys there that have been at it for a long time.

Maybe ask Canon how you can check a board? I don't see how it could be a board. Why would a board go bad from non-use unless the printer was stored in adverse conditions like outside in bad weather and something corroded? Maybe a board connection became a bit loose if it was jostled during the move. Maybe lean a bit on the people you bought the heads from in case they also have tech service since you already dropped a few hundred on them. Call some computer places and see if someone that knows boards might know how to check the circuits? They must do that to motherboards. Otherwise all I can do is Cheer and hope it goes better!!! John
 
Sadly no good news on this update. Spoke with a good local company rep who contacted their Canon support and was told that Canon Tech would not touch the printer. My local guy would be relying on Canon Tech so he could not help at all. My local guy said to check the main board for bad fuses. Something I will look at.

As for digging into this printer. I took off the top covers of the printer and traced the ribbon wires from the heads through the body and down to the main board. I unlocked each cable at the heads and main board and reconnected to make sure there was a good contact. I also checked each connector on the main board to make sure everything was connected firmly.

I pulled out the purge pump a second time to take a look at each pump in the unit. All they are is a rotating device rolling on a flexible tube to draw the ink down. I did not see anything that stood out as a problem. My question is how much of a suction does the purge unit provide? I am not convinced that the pump is providing enough suction because today I watched a very slow motion of the ink in the ink tubes when the unit was performing an Absorbing Ink function. I figured how to start that function by leaving an ink tank top open when starting the printer. The ink tubes never have a chance to fill by the time the printer wants to do something else. I should connect a vacuum pump to the purge pump and increase the suction to see if that really is the problem all along.

I also cleaned the print heads to make sure there was no clog in it as well. I did not see any issues.

I have screws and panels and covers all over my work floor. I hope I can remember how to put it back together and not wind up with extra screws. The photo is of the board behind the print heads. You can see two white fuses in the back middle with the ribbon in between them.



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Dwight
 
Thanks for the report and good luck.

Besides fuses, the capacitors look good, but is there any way to test them.
 
WoW, I wouldn't know where to start on that. But I'm sure every doodad on that board has a number and each one has an entry voltage and an exit voltage and can be tested. Maybe find a Junior college in your area and an electronics student, for a couple of dollars would be happy to check it for you.

Mechanically it's easier. How does it create the vacuum? If there is an air leak of any kind it won't develop vacuum. I'd think it was gravity from the tanks for a while at least.

As I mentioned, check out the Luminous Landscape there are a lot of LF printers there, maybe ask there, I think there is at least one tech.

Again good luck! John
 
You are better testing the caps out of circuit but they look ok. I tested five of the fuses and they were all good. Not much else to do on this board.

Dwight
 
I wish they used gravity to move the ink to the print heads but sadly the ink is below the level of the heads, that is why the ink flow back to the tanks.

I posted on Luminous landscapes but no one could offer any solutions. It has been quiet there for a long time.

I am about at the end of my trouble shooting steps. I do not want to buy any used parts since I did not want to sink any money into this printer other than ink and replacement heads that I have. The risk buying used parts is too high so this printer, with only 600 pages printed will become a parts machine. If you know anyone looking for parts for their Canon IPF 8400 printer let me know.

Thanks for your support.

Dwight
 
I've bought the same (8300) many_years_stay_off printer, and start it. Start with old printheads, previously (before enabling!) cleaned manually with half a liter of glass cleaner fluid, and have perfect nozzle test No inks in tubes is not a problem. It can be solved manually: remove covers, release printhead carriage from service station (as described in service manual), remove printheads. Then little trick: unlock ink tube blocker at the rear side of ink station (if needed, I can do photo), put elastic tube on the ink connectors of carriage, and make a vacuum (for example, use medical syringe, connected to another side of elastic tube, as vacuum pump). Do the same for all problem channels. It's simple. More interesting problem with third-party cartridges: if Canon detect third-party chip, it start to pump, and will pump while ink tanks have any inks. Next week I'll try to fix it (spy on the cartridge bus, and try to decode raw data between cartridges and printer).

Sorry for my terrible English.
 

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