Need Help Rolland 540V

[dgross]

Hello,
We have a 540V, purchased used. Got the unit home, printed 2 jobs on it. On the second job print head stopped in the middle and service code 0002 came up on the display. The unit had 2 new Rolland print heads and print head cables in it when we got it. We have swapped out main board, servo board, power supply and most all cables. Checked power at outlet. You turn machine on and within 1 second you get the 0002 code on the display and 2 beeps. Nothing we have done has changed anything.
Has anyone else had a similar issue, any help would be greatly appreciated.
Thank You

 

[Zoogee World]

Just confirming that you replace the cable that goes from the mainboard to the servo board with a brand new cable? Also by swap, do you mean you used an old board?

 

[damonCA21]

0002 is a faulty servo board. Where did you get the replacement board from as its possible this is damaged as well

 

[dgross]

Just confirming that you replace the cable that goes from the mainboard to the servo board with a brand new cable? Also by swap, do you mean you used an old board?

No it was not new, but was from a another running 540. Same with the main board and servo board.

 

[dgross]

0002 is a faulty servo board. Where did you get the replacement board from as its possible this is damaged as well

We pulled the servo board out of our 30" machine as it is the same board as the 540. Also tried a servo board from a running 540 that had bad print heads.

 

[Zoogee World]

No it was not new, but was from a another running 540. Same with the main board and servo board.

Did you try them just one at a time or all together?

 

[damonCA21]

OK well for some reason the main board thinks the servo board is faulty, but if it is definitely ok, then you need to be looking at the main board and why. If the main board is ok then the obvious link between the two is the cables.
I have also seen this error come up when the cables from the print carriage board have a fault so I would look at replacing those too, or the print carriage board itself

 

[damonCA21]

Also try swapping all the other cables on the servo board one at a time. It could be its getting a bad signal from something else on the printer and it's confusing the board

 

[dgross]

Did you try them just one at a time or all together?

one at a time, that is what is so puzzling. nothing changes

 

[Zoogee World]

Maybe try replacing the cables to the print carriage board and the print carriage board and if that doesn't do anything, try as damon suggested and maybe try replacing both the main board and servo board at the same time.

 

[dgross]

OK well for some reason the main board thinks the servo board is faulty, but if it is definitely ok, then you need to be looking at the main board and why. If the main board is ok then the obvious link between the two is the cables.
I have also seen this error come up when the cables from the print carriage board have a fault so I would look at replacing those too, or the print carriage board itself

Ok, Also the print carriage board is the only board we have not tried. I did find one will have it Tues. am going to try that also.

 

[damonCA21]

Ok, Also the print carriage board is the only board we have not tried. I did find one will have it Tues. am going to try that also.

At some point swapping something has to work!

 

[dgross]

At some point swapping something has to work!

Replaced the cut carriage board and once again, there was no change.

 

[Zoogee World]

Replaced the cut carriage board and once again, there was no change.

Try replacing all at the same time and see if anything changes and if it fixes it then remove one by one until the issue comes back and that should show which part is the troublesome part.