What is RepRappro policy on self-repair of Duet boards?
December 21, 2013 07:30AM
I'm aware that as the owner of an early Duet board with two resistors incorrectly mounted, I can return the board for a replacement. But RepRapPro is now closed until next year. What is the policy on owners who have previous experience of SMD soldering attempting to desolder and resolder the resistors themselves?
Re: What is RepRappro policy on self-repair of Duet boards?
December 21, 2013 08:19AM
It's an interesting point, dc42, and something we've been mulling over, especially since we went 'big time' with RS!

Our general policy is that it is your printer, and you are free to do what you want to it. It's the nature of machine evolution that Adrian Bowyer promotes, that by Open Sourcing the design, people are free to make their own choices, and the printer can develop independently of us. We feel that our responsibility is to get you printing, and will support you as much as we can to get as many of our customers as possible to that point. Parts that are missing, supplied incorrectly, and broken during assembly (especially if the instructions aren't clear) will be replaced under warranty. If a customer decides to diverge significantly from our instructions, we feel we can't be held responsible for that choice, and the warranty will be void. That's not say we won't continue to support that customer with advice, but the limits to the warranty have to be realistic.

Once the printer is operational, and something breaks, we try to work with the customer to diagnose the problem, and come up with a solution. This can feedback into the instructions, and/or inform the customer so they do not repeat the mistake. If replacement parts are needed, we generally need some evidence that failure is our responsibility, rather than the customer's, to authorise warranty replacements. We're pretty good at knowing what can go wrong!

The case for the first 220 Duet boards is that they have been supplied functioning, but not fully functional. It depends how each customer intends to use their printer as to whether this is a problem for them or not. We're aiming to do a 'managed' recall, so that we have enough boards, and time, to cope with the turnaround over a couple of months, rather than all at once. We would like these returned to us, as we can then send them back to the manufacturer to be fixed. If a customer tries to fix the board, and fails, that becomes more difficult, and will be looked at on a case-by-case basis.

I think, in the end, it's down to common sense. If you KNOW that fixing the board is within your capabilities, I would say fix it. If you THINK that you MIGHT be able to fix it, I would advise against it. You may left with a properly broken board, and we may be more circumspect about replacing it, depending on the damage done to it - tracks lifted being the worst, as it makes the board unrepairable.

If there already other issues with the board, eg some customers have reported loose/poorly soldered USB connectors and SD cards, I would say DON'T fix it; return it for a warranty replacement, with a note of the fault. That way, we can feedback to our supplier, and get them to improve reliability.

I hope that helps.

RepRapPro tech support
Re: What is RepRappro policy on self-repair of Duet boards?
December 21, 2013 08:34AM
OK, thanks for that. I don't have any other issues with the board. USB is working, and Ethernet works provided that I don't connect with Pronterface over USB first - but I guess that is a software issue. So I might fix it myself, depending on how annoying the need for USB power gets.
Re: What is RepRappro policy on self-repair of Duet boards?
December 23, 2013 06:25PM
I've removed those resistors, replaced them with new ones in the correct orientation, and added the 5VEN jumper. So now the board works with ATX power alone. I'm getting 4.93V pin the +5V line.

However, now I hear that another mod is needed, which is to solder the tabs of the USB connector to the board. Before I dismantle the unit again to do that mod, are there any other inspections or mods to the board that need to be done?
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