Just replaced all printheads a week ago, now I get that one printhead is bad! DJ500

[RHOPKINS]

Re: Just replaced all printheads a week ago, now I get that one printhead is bad! DJ

I usually pull about 5ml of ink out when priming the tubes.

Kiran

You know I am surprised that I don't get some error code for the carriage pcb. Talked to Tim at LPS computer and he said it was rare for this board to fail. Guess their is a first time for everything. Ordered a new carriage assembly from them. Have you seen many of these boards fail?

[Kiran Otter]

Re: Just replaced all printheads a week ago, now I get that one printhead is bad! DJ

I'd get a trailing cable at the same time. There's a fair chance you won't be able to reuse the old one.

No, I've only seen a handful of bad carriages over the years.

Kiran

[RHOPKINS]

Re: Just replaced all printheads a week ago, now I get that one printhead is bad! DJ

I'd get a trailing cable at the same time. There's a fair chance you won't be able to reuse the old one.

No, I've only seen a handful of bad carriages over the years.

Kiran

I already have a new trailing cable though about replacing it as well. Do you think a bad trailing cable could be the culprit all along?

[Kiran Otter]

Re: Just replaced all printheads a week ago, now I get that one printhead is bad! DJ

I would be surprised if the trailing cable is the cause; the printheads only communicate with the carriage PCA, not the EMOD. But unfortunately some problems involve trial and error to solve.

Kiran

[RHOPKINS]

Re: Just replaced all printheads a week ago, now I get that one printhead is bad! DJ

I would be surprised if the trailing cable is the cause; the printheads only communicate with the carriage PCA, not the EMOD. But unfortunately some problems involve trial and error to solve.

Kiran

I think I could write a book on trial and error. I have just about replaced all the boards in the machine it seems like. Will let you know when I replace the carriage assy. I ready for some good news for a change.

Richard

[RHOPKINS]

Re: Just replaced all printheads a week ago, now I get that one printhead is bad! DJ

Hello Kiran & Don;

I am a total loser. I just replaced the board in the carriage assembly, and I still show a bad black printhead. So following up on a suggestion Kiran made I replaced the trailing cables too. Still get the blasted error for the printhead. Something that did show up tonight when I was looking at the other color printheads is the Cyan printhead says it is expired, but show to be working wonder if this could be a issue? Guys I am running out of stuff to replace. All together I have replaced the EMOD, ISS unit, carriage PCB, trailing cables. By the way, Kiran it did show on the display to have firmware 5.01 so it has been upgraded. Maybe it is the carriage unit contacts they are clean.

[Kiran Otter]

Re: Just replaced all printheads a week ago, now I get that one printhead is bad! DJ

The only thing that expires is the warranty. The printheads will continue to work past the warranty date.

If you've replaced all these parts and still get the error, you either still have a bad printhead, or possibly the EMOD you got is defective.

Kiran

[RHOPKINS]

Re: Just replaced all printheads a week ago, now I get that one printhead is bad! DJ

Ok about the warranty issue. I only replaced the board in the carriage unit, could it likely be the contact circuit board messed up somehow. I am wondering if that could be the issue. Have you experienced anything like that? I was thinking that the EMOD could be the culprit but I found it odd that it had the exact same error as the old EMOD. I ordered a complete carriage assembly from LPS should be here Wednesday. I am going to have quite a number of parts left over on this project. Richard

[Kiran Otter]

Re: Just replaced all printheads a week ago, now I get that one printhead is bad! DJ

Ah, if you had the same issue with the old EMOD, then I would rule out the EMOD. And it could be the flex cables (that connect the heads to the carriage PCA.)

If another carriage doesn't do it, then I'm not sure what it is. I'd get another black printhead to rule out the consumable for good, at least.

Kiran

[RHOPKINS]

Re: Just replaced all printheads a week ago, now I get that one printhead is bad! DJ

I ordered a black printhead from Amazon this time so as to see if the batch was bad from the other source. Yep same error on the other EMOD I am really starting to think it is that connection between the head and the circuit in the carriage. I'm like you since I replaced the trailing strips I don't know where to go from here. Really appreciate everyone for chiming in on my issue. Richard

[RHOPKINS]

Re: Just replaced all printheads a week ago, now I get that one printhead is bad! DJ

Hi Kiran;

Just installed the new carriage assy and a new printhead and I still get the error for the black printhead. I am wondering could the cartridges have something to do with this issue? Everything else has been replaced I am questioning the black print cartridge it called for a new cartridge right before I started getting this issue. I replaced it but I had to put the old one back in to boot it up then I switched the cartridge to the new one and it worked. You know I replaced the ISS unit 2 weeks ago, and had to fool it again to get it to accept the cartridge. What is your take on that?

I'm overlooking something and/or I am going crazy.

Richard

[Kiran Otter]

Re: Just replaced all printheads a week ago, now I get that one printhead is bad! DJ

So you've ruled out the EMOD, trailing cable and carriage assembly. That leaves the printheads. I would rule out it being another printhead causing the issue by replacing the other three.

And I've never seen the ink cartridges cause a printhead issue, but anything's possible.

Kiran

[RHOPKINS]

Re: Just replaced all printheads a week ago, now I get that one printhead is bad! DJ

Kiran;

I have bought 5 black printheads to date. The last one came from Amazon, so I did not buy it from the same source as the other ones. I just don't see how I could get 5 bad printheads. Another thing it shows the x for the printhead even when there is no printhead installed. I should show that no head is installed but it does not do that. I am overlooking something and I am wondering if it is the chip in the cartridges.

Richard

[Kiran Otter]

Re: Just replaced all printheads a week ago, now I get that one printhead is bad! DJ

I should have been more specific. It could be one of the other printheads causing the the black to malfunction. Replace the three other printheads, yellow, cyan and magenta.

Beyond that I have no more advice.

Kiran

[RHOPKINS]

Re: Just replaced all printheads a week ago, now I get that one printhead is bad! DJ

Well I found the problem. It was in fact two bad print cartridges. The black and the yellow were evidently sending bad information to the EMOD. Anyway when I replaced the cartridges the head error went away. I have completely calibrated it and did a printhead alignment successfully. I tried all the black printheads were fine. I will try to print something tomorrow, I am worn out.