Question Roland SP540v - Black and Magenta print issue

[Kris2022]

Hi

I have run into a serious issue in my sp540v and don't know how to get it fixed or what need to be fixed. Please I really appreciate anyone's comment/advise to find a way to get the printer working. Printer has been working really good for many years until last week when I switched it on and did a test print to see the following test print

The Yellow and Blue test prints are ok but the Black and Magenta is messed up. I did a 4 colour bar print from versaworks and that looked like below

So it definitely there is a problem in Black and Magenta print. The annoying thing is the issue is not from a single printhead but from both heads and Black print from first head 1st channel and Magenta print from second head 1st channel so the issue is a combination of both heads. What I have done so far,

1. I swapped the data cables from Carriage Board to Printheads but still the same

2. Put in new data cables from Carriage Board to Printheads but still the same

3. Reading forum comments here I did a check on the 8 transistors and they all show 43 on the two end legs of each transistor. I assuming they are not blown?

4. Both F2 and F3 printhead fuse are ok not blown

Please I really like ssomeone's advice here where to go from here..Thank you in advance!

 

[Solventinkjet]

You're right to be looking at the boards since the issue is affecting both print heads. I would check the trailing cables to make sure there isn't any damage, corrosion, or burn marks and re-seat them to make sure they are perfectly connected. Unfortunately since this happened out of the blue it's more likely a blown component on the main board.

 

[Terry01]

Need to see more tests.. forget versa..Do the test from the machine.Check all cables to heads again and then do a test print. Then go into service mode, do a test print there. Go to menu and arrow down until you get to print test. Goto "full" and run the bands from there and post your results

 

[Terry01]

PM'ed you