ROLAND VP-540 Will not power up

[damonCA21]

Odd that AI haven't mentioned that there is a know manufacturing fault with these boards that causes bad connections?

 

[Adam Edge]

I have a business to run first. trying to fix 2oyr old sht is just a hobby for me, I got 4 other printer doing the work so this is on my spare time. Will keep everyone updated. Peace out from down under for now!

 

[Adam Edge]

Odd that AI haven't mentioned that there is a know manufacturing fault with these boards that causes bad connections?

na i don't think AI makes excuses lol

 

[Adam Edge]

I think I found a problem on this rail (VCC3?). Bad board shows a value, with or without the working ic49 that I removed and several capacitors on VCC3, good board is OL. Yet to find the component responsible

 

[Adam Edge]

https://www.rocelec.com/part/01t4w00000PP87HAAT-HD6417297BP267?utm_source=findChips&utm_medium=buyNow&utm_term=obsolete

All roads are leading me to main chip via VCC3 haha

 

[JKstorm]

I have a VP 300. Bought it when they first came out. Over the past several months I have had a problem with the machine disconnecting randomly, which ruins any print that I am running. I have tried several fixes but it really came down to a problem with the main board. I sent it out to these guys.

Brooks Circuit Specialists

They replaced several of the boards components, tested it and assured me that it was problem free. They did not say that they found the problem but they did say it was a complete rebuild. This board was on their list of boards that they regularly rebuild. So far all is good. They charged me $450 including sales tax. Well worth the price considering lost time and wasted material as well as aggravation. I realize that this is a different problem that is being discussed here however a bad board is a bad board. (see before and after images).

Jack

 

[cornholio]

Looks like their "complete rebuild" consists of cleaning the board and replacing the elcos. Maybe a reflow on top. The reflow cold help in this case, but there is no guarantee...
I wonder how they test it, except they have a printer...
But if it works, it's worth the money...

 

[damonCA21]

Looks like their "complete rebuild" consists of cleaning the board and replacing the elcos. Maybe a reflow on top. The reflow cold help in this case, but there is no guarantee...
I wonder how they test it, except they have a printer...
But if it works, it's worth the money...

I thought the same A reflow is most likely, but that will fail again in time

 

[netsol]

Swapping the main chip is a good way to end up with two dead boards I would only really consider it as a last resort. Removing it can be useful to see if the shorts then vanish, but that will only confirm the chip is bad not that the board will work properly with the other chip installed.
Swapping main chips is a bit of a crap shoot unless you know 100% the other one was fully working, and as we have mentioned, 99% of the problems with these boards are physical connections rather than bad components.
At least you will get plenty of practice soldering though!

2 dead boards is the only likely outcome.

Adam, we really are on your side but i would bet a month's pay that going down that path will not have a happy ending

Odd that AI haven't mentioned that there is a know manufacturing fault with these boards that causes bad connections?

Odd that AI haven't mentioned that there is a know manufacturing fault with these boards that causes bad connections?

I think that’s a secret

(although bad multilayer connections typically DO NOT short components that adam found & changed)

 

[netsol]

Swapping the main chip is a good way to end up with two dead boards I would only really consider it as a last resort. Removing it can be useful to see if the shorts then vanish, but that will only confirm the chip is bad not that the board will work properly with the other chip installed.
Swapping main chips is a bit of a crap shoot unless you know 100% the other one was fully working, and as we have mentioned, 99% of the problems with these boards are physical connections rather than bad components.
At least you will get plenty of practice soldering though!

2 dead boards is the only likely outcome.

Adam, we really are on your side but i would bet a month's pay that going down that path will not have a happy ending

Odd that AI haven't mentioned that there is a know manufacturing fault with these boards that causes bad connections?

Odd that AI haven't mentioned that there is a know manufacturing fault with these boards that causes bad connections?

I think that’s a secret

20 years ago, everyone doing laptop/notebook repairs needed a rework oven because NVIDIA turned out a years worth of product with bad connections & plated through holes.

 

[Adam Edge]

I have a VP 300. Bought it when they first came out. Over the past several months I have had a problem with the machine disconnecting randomly, which ruins any print that I am running. I have tried several fixes but it really came down to a problem with the main board. I sent it out to these guys.

Brooks Circuit Specialists

They replaced several of the boards components, tested it and assured me that it was problem free. They did not say that they found the problem but they did say it was a complete rebuild. This board was on their list of boards that they regularly rebuild. So far all is good. They charged me $450 including sales tax. Well worth the price considering lost time and wasted material as well as aggravation. I realize that this is a different problem that is being discussed here however a bad board is a bad board. (see before and after images).

Jack

Hey Jack, thanks for letting us know, that's great info. Yeah the disconnect is a common issue and my other board is like that. Would have been great to know what the rebuild consisted of. haha

 

[Adam Edge]

No boot FIXED! replaced main chips

 

[Adam Edge]

2 dead boards is the only likely outcome.

Adam, we really are on your side but i would bet a month's pay that going down that path will not have a happy ending


I think that’s a secret

(although bad multilayer connections typically DO NOT short components that adam found & changed)

I hope you make good money per month lol. ill send you my account details

 

[damonCA21]

No boot FIXED! replaced main chips

Well done, did all the shorts go as well?