Designjet T830 - Printhead error

[Quicksilver]

T830 36" with error message - Printhead not fitted, undetected or incorrectly fitted. Have removed & cleaned contacts without success. Fitted new printhead kit & error still the same. Firmware is at latest level. Goes through all it's other diagnostic checks & comes to ready, but with the error message. I'm thinking Carriage Assy may be at fault, anybody else had this, suggestions or further checks please?

[Kiran Otter]

I would consider the trailing cable first, then the carriage, then the main PCA. I'm curious if you enter the service menu (home, back, home, home) and try to view the extra printhead information, what you get; can it tell you anything about the printhead? I would expect it to be unable to, but if it can that means at least there's some communication going on. Maybe try disconnecting the trailing cable from the main PCA and see if anything changes. If it doesn't, then the main PCA may be suspect.

Seems HP has discontinued the trailing cable. I'll see if I can find another part number.

Kiran

[Kiran Otter]

Are you sure you have the correct printhead? And now I realize why you can't just replace the trailing cable; it only comes with the carriage assembly. F9A28-67003

Kiran

[Quicksilver]

[QUOTE=Kiran Otter;2254751]Are you sure you have the correct printhead? And now I realize why you can't just replace the trailing cable; it only comes with the carriage assembly. F9A28-67003

Kiran[/QUOTE

Hi

HP 729 Printhead Replacement Kit, Part No.F9J81A. I believe this to be the correct one.

I have the Carriage Assy as F9A30-67061 & yes it indicates it comes with Trailing Cable & Belt too. I got this from the T730/T830 Service Manual. Maybe the part No. has been upgraded because of improvements

[Quicksilver]

I would consider the trailing cable first, then the carriage, then the main PCA. I'm curious if you enter the service menu (home, back, home, home) and try to view the extra printhead information, what you get; can it tell you anything about the printhead? I would expect it to be unable to, but if it can that means at least there's some communication going on. Maybe try disconnecting the trailing cable from the main PCA and see if anything changes. If it doesn't, then the main PCA may be suspect.

Seems HP has discontinued the trailing cable. I'll see if I can find another part number.

Kiran

Yes you are right Kiran, when trying to get the extra Printhead info, it just displays the error message, so no communication

[Kiran Otter]

You have the correct printhead. Then I would replace the carriage and trailing cable and see if that fixes it and hopefully it's not the main PCA.

And for anyone who ends up here looking for the trailing cable or carriage; F9A28-67003 is the carriage for the 24" model. F9A30-67069 is for the 36" model. I inadvertently only listed the 24" carriage earlier.

Kiran

[Quicksilver]

You have the correct printhead. Then I would replace the carriage and trailing cable and see if that fixes it and hopefully it's not the main PCA.

And for anyone who ends up here looking for the trailing cable or carriage; F9A28-67003 is the carriage for the 24" model. F9A30-67069 is for the 36" model. I inadvertently only listed the 24" carriage earlier.

Kiran

Thanks Kiran, my customers machine is indeed a 36" & fingers crossed the carriage/trailing cable combination sorts it

[blackcat4866]

Take care fitting the ribbon cable ends. It's very easy to damage the conductors. =^..^=

[Quicksilver]

Thanks Kiran, my customers machine is indeed a 36" & fingers crossed the carriage/trailing cable combination sorts it

So, I've fitted the new carriage Assy today complete with trailing cable & belt & I still have the exact same error message. Having checked the error log afterwards, it records 0027-0059, which relates to a printhead error & 0800-0056, which may be more relevant, but isn't in the service manual.

I'm also unsure that the new printhead fitted originally, may have been corrupted in some way. The logical step next is to fit a new main pca, but it's getting very costly for the customer, so any further help would be appreciated

[Kiran Otter]

You should be able to return the printhead as defective and get a replacement, from wherever you bought it. That would rule out the printhead for sure.

Kiran