102 speedmaster Water form roller not rolling.

Ok here we go, I have a 1989 102 speedmaster that the water form roller isnt moving on unit 4. I checked the wires and found everything to be good to the board. I decided it swap the LEI-DVS 600/B board with unit one and two. and the problem followed to unit 2.
I thought Problem solved its the board. We after having the board repaired it didn't work. I found two other boards and they didnt work. Now im left scratching my head as to what is going on. I do have errors on the screen but I have no idea what they mean. Below I attached photos of the screen. Any help would be greatly appreciated.

 

Those are your LTK power supplies, check your fusing on the LTKs, reset the HAKs, swap your HAK boards to see if those are culprit. The board layout schematic is in the final pages of your blue electrical schematic book.

 

Are you at Precision? And you are speaking of water pan roller, not form roller...correct?

 

Yes water pan roller. I’m troubleshooting a machine at the facility that was once called Precision. Without an electrical schematic, I’m struggling to locate the HAK reset and identify the correct board positions in the cabinet.
Here’s the odd part: swapping the two boards causes the problem to follow them, suggesting one is faulty. However, replacing just the suspected board doesn’t fix the issue. Any guidance on finding the HAK reset or understanding why the board swap behaves this way? If you have a schematic or know the board setup for this machine, that’d be a lifesaver.

 

The schematics (blue cover/plastic overlay) should be there, I looked at the issue last time I was there and I'm sure I had the schematics out. When I mentioned reset the boards, I mean to simply unplug and plug back in to reestablish solid connection....now that I know this is the machine in Plymouth, I'm sure the HAKs are not in play as being the issue. Was the LTK sent out for repair, do you know that the repair was actually viable?

 

The LTK was sent out for repair and then sent back to the repair facility to verify it was a good repair after it didnt resolve the problem. They also sent 2 other boards to verify that they weren't missing something after all of that the problem stayed the same. Something is being missed but I have to say it seems like its the board. Reracking the boards didn't work by the way.

 

The one think I cant help but think is there a version of board that I have which is the wrong board? Could that be the reason that when the board is in 3-4 position 4 doesnt work and then if the board is swapped to 1-2 position the tower 2 doesn't work? The only part about that is if this was the case you wouldn't think either of the positions woud work.

 

Interesting scenario, one that I’ve not seen a power supply replacement remedy. That is a first year CPTronics machine, and I’m sure there’s been more than one version of that board introduced, but I’m not able to say at what version the boards would be incompatible, if at all. Is it possible there’s a dead short somewhere along the cable runs (under machine, in cable run trough or where the quick disconnect to motor under machine is) that the moment you plug new board in, in pops the glass fuse? I know you say the repair facility has been working with you to resolve the issue, and if fuse is popping, they would have seen that . Just reaching, at this point. Maybe your best option is calling Davco?

 

The only problem with the dead short theory is I took the board that controlled units 1/2 which was a known good board and put it in position of 3/4 and it fixed the problem. That being said I haven't found a 2nd board that will fix the problem.

Who is Davco? I googled that name and couldn't find a match that made sense.

 

Davco Technologies in Columbus, MN