Need Help Roland VS540i, Brand New Printhead Zero Nozzles firing after installing

[Jim Hancock]

I would change the meter to 200, 1 click clockwise from the setting you have now. You need to see numbers to test transistors. Refer back to post #2 on how to test transistors. You should read around 42 ohms. Your fuses should read 0 ohms or close to it. A blown fuse will read .0l, like in your meter pic.

 

[cornholio]

The pump should be replaced at around 200k pump cycles. I had machines with pumps around 200k still doing a good job for colors, but not for white anymore...
If some colors print and others don't, it could be the pump or the cap(alignment). (The cap doesn't disalign itself... so don't play with that, if you don't have to.)
If you use the expensive Roland parts, you should be ok replacing... if you use the Chinese copies, pray to whatever God you worship...
If i get called to a machine, where some DIY'er tried his luck with parts from Alibaba or Temu or other shady sources, I replace the parts for the customers sake. My hourly rates are too high to test these parts... it's for the good of the customer.

 

[damonCA21]

You also need to test both sides of the transistor as they can short and still give the 42/43 ohm reading

 

[damonCA21]

If you are in the UK I do board repairs and testing ( am in the UK too ) if you prefer someone else to have a look at it for you

 

[Myster Enigma]

Thanks guys I'll test the fuses on Monday and let you know. Really appreciate the advice. In terms of the replacement parts I did buy the cap station and pump from eBay. I'm sure they're not genuine but I have replaced capping stations a few times before without any issues. I'm still waiting for the pump. I ordered 2 printheads from Digiprint supplies and I asked them before hand if they were genuine and they said they were. I've replaced the one on my BN20 and it works perfectly.

 

[Myster Enigma]

If you are in the UK I do board repairs and testing ( am in the UK too ) if you prefer someone else to have a look at it for you

Ah that's great, I'd definitely like it tested just to be sure that everything is fine. May I ask if you can also repair and diagnose the issues to do with the air in the system if it's not an electrical issue. The address is in Birmingham. Please let me know. Thank you

 

[damonCA21]

I am in South Wales so you would need to send the board to me for testing but no problem to do this ( removing and refitting the board is an easy job ). I can help remotely with the air in the system if there arent any board problems