Need Help Print problem Roland BN-20

[sekorse]

Ok thanks but if the fuse is blown then I just have to change it? Will the head work again or do I still have to replace it?

 

[adamfromayr]

No one can answer that! Its impossible to say, its trial and error its easy to check the fuse

 

[damonCA21]

That one is the cut carriage board. The print carriage board will be the one the cables go into from the print head. It may be called something different on the BN20 ( I'm not as familiar with them as the larger Rolands ) but it basically sends the signals from the printer to the heads. If this starts to fail then it can send the wrong signals of when to turn the nozzle on and off

 

[sekorse]

I've just tested the 2 fuses on the main board, and they're working (1.8ohm resistance in each).

 

[sekorse]

That one is the cut carriage board. The print carriage board will be the one the cables go into from the print head. It may be called something different on the BN20 ( I'm not as familiar with them as the larger Rolands ) but it basically sends the signals from the printer to the heads. If this starts to fail then it can send the wrong signals of when to turn the nozzle on and off

The 4 print head cables are connected directly to the motherboard on my bn20

 

[damonCA21]

Ah ok, it may be a fault with that board, but I would still bet on the head being bad

 

[sekorse]

The motherboard contains 2 fuses (unlike the head, which doesn't). Don't you think they would have blown if this board was the problem?

 

[adamfromayr]

Damon is talking about the Carriage/Cutter board or and the Cartridge board That can cause issues with the head!

And i agree i had a dodgy cable to the "Cartidge board" and it would start up okay but not read the linear code strip

Im guessing the head are all your cables? 100% clean and no ink anywhere ?

I opened up a head today and it was flooded!

But my issue is different from yours

Have you tried to CHANGE the Capping station yet?

and soak it with cleaning fluid? Then make sure the head is sitting about the capping station overnight

 

[sekorse]

Damon is talking about the Carriage/Cutter board or and the Cartridge board That can cause issues with the head!

And i agree i had a dodgy cable to the "Cartidge board" and it would start up okay but not read the linear code strip

Im guessing the head are all your cables? 100% clean and no ink anywhere ?

I opened up a head today and it was flooded!

But my issue is different from yours

Have you tried to CHANGE the Capping station yet?

and soak it with cleaning fluid? Then make sure the head is sitting about the capping station overnight

Yes the capping station is new and soak is ok

 

[sekorse]

Hello, I changed the print head today for a new one and new cables (sold new but with some ink residue... the seller tells me it's because they are tested by espon before being sent to the seller...), I no longer have the flow problem however I still have a magenta line missing when testing the nozzles... would you have any idea why? The configuration of my bn20 is CMYK+Mt but instead of metal I have a cleaning cartridge. The versaworks print test had no problem.

 

[damonCA21]

Epson test the heads by printing with a water based ink. They then put a magenta coloured solution in to them that protects the heads while being stored, so that is probably what you are seeing.
Are you getting magenta ink to the head where the print is missing?

 

[sekorse]

Yes, that must be it, a bit of magenta residue, the seller advised me to inject cleaning fluid into all the nozzles before plugging it in, which I did, and yes, the magenta ink comes out because there's only one magenta channel.
The 8 channels on the head are :
2x yellow
2x cyan
2x black
1x magenta
1x cleaning solution (or metallic ink)

 

[damonCA21]

Where is the magenta line missing as the test print looks ok from the pic you posted?

 

[sekorse]

And now I have lines in my print test

 

[sekorse]

Where is the magenta line missing as the test print looks ok from the pic you posted?

On the nozzle test, aren't there supposed to be 2 columns of each color?

 

[damonCA21]

Do a test print in service mode, you need to see if the small nozzles are firing properly as well ( the normal test print only uses the large nozzles )

 

[sekorse]

Some blue and black nozzle are missing

 

[damonCA21]

IIRC with the BN20 it will print once from each head, so if you only have one magenta cartridge connected it will only print one column on the test

 

[damonCA21]

That looks as though you may have something on the surface of the head. Check this and see if it has picked up something on there

 

[damonCA21]

And a nozzle test like that would account for the lines in the black on the test print