Repairing a cloned magicwave

[Dutch Welder]

With you being a miracle worker the railing work should be a simple finger snap and a silent muttering of abracadabra and it should fix itself mate.

 

[HughF]

With you being a miracle worker the railing work should be a simple finger snap and a silent muttering of abracadabra and it should fix itself mate.

Hmmm.... I'm not sure about that mate thin stainless isn't my strong point - and I don't have the boat it is supposed to be going on. The marine engineer I'm doing this for will test fit tomorrow and mark any adjustments. I've tacked it up for now...

 

[armalites]

Once upon a time there people in every town repairing stuff who could work through a circuit and fix it. It's become quite a rare skill these days even though the world is way more complex. I did electronic engineering at college while working as a prototype wireman. There was guy in the lab I worked in who didn't have an exam to his name but he was a wizard, he would stick ICs on their backs and solder components to the legs while building prototypes. Building the circuit was one thing but he was visualising everything in reverse.

It will great to see the progress on this and hopefully a good outcome. It's certainly one of those professions that you can't just learn to be good at you need a flare for it.Time just disappears when playing with this kind of thing and I guess that's why it's often not viable to repair them.

 

[Richard.]

thin stainless isn't my strong point -

Absolute poppy cock!
I’ve seen your stainless first hand with a fast pulse.
Skills.

 

[HughF]

Damaged area of the board is filled and levelled off with quick setting epoxy, you want to dig out any carbon deposits and then cover up the damage. This will leave. Good substrate to paint with solder resist then glue the surface mount components back down.

We wait for parts from the far east now...

 

[postie jon]

please be carefull what you type into google images ,magicwave and not as i thought magicwand.

 

[Jim Davey]

Would you like some more PCBs to play with Hugh?

 

[gaz_moose]

please be carefull what you type into google images ,magicwave and not as i thought magicwand.

well it is in the fronius section not the hitachi. (don't google that).

 

[HughF]

Would you like some more PCBs to play with Hugh?

Depends what they are Jim, and the nature of the failure but I'm always game for looking at stuff...

 

[HughF]

well it is in the fronius section not the hitachi. (don't google that).

It's only a massager

 

[Jim Davey]

I’ve got a maddening fault on an EWM wire feeder board. If you flex it it works, if it is left in it’s normal at rest position it doesn’t. I’ve replaced it with a new one but it would be nice to have it fixed up as a spare as the feeder board in the old Phoenix machines seem to be the pcb I’ve replaced most over the years. Hardly surprising though, feeders get a hard life on the fleet.

 

[HughF]

I’ve got a maddening fault on an EWM wire feeder board. If you flex it it works, if it is left in it’s normal at rest position it doesn’t. I’ve replaced it with a new one but it would be nice to have it fixed up as a spare as the feeder board in the old Phoenix machines seem to be the pcb I’ve replaced most over the years. Hardly surprising though, feeders get a hard life on the fleet.

That sounds like an easy fix - I'm particularly good at surface mount inspection - send it over and I'll take a look

 

[sako243]

0603 is the norm for me at work building prototype boards, we use a little 0402 but try to avoid it as we are not space constrained although we run 6 layer on our main card.

You lucky person - I've had a couple of times to rework 0201s, 0402 is the norm for us unless it's power supply related.

Layout guys loved me though - gave them a big PCB area to work with (A4ish) and then asked them to cram pretty much all 2000+ components into one corner as it was the only one we had clearance height wise

 

[HughF]

You lucky person - I've had a couple of times to rework 0201s, 0402 is the norm for us unless it's power supply related.

Layout guys loved me though - gave them a big PCB area to work with (A4ish) and then asked them to cram pretty much all 2000+ components into one corner as it was the only one we had clearance height wise

I think 0402 is the industry standard these days - we're certainly behind the curve when it comes to layout (our software, our processes, our sizes) but it does us no harm sticking with the larger size stuff

 

[sako243]

I wouldn't worry too much - we're simply trying to cram more and more stuff into smaller and smaller boxes...

In some other consultancy I do the fuse is a length of copper bus bar 1"x3/8"x6".

 

[HughF]

Rs delivered a few of the surface mount resistors and capacitors needed for this repair. We use a smaller size than this in our production boards so this necessitated the order... still, these parts are literally sub-pence each so it is no bother.

Awaiting some surface mount adhesive then I'll glue down the components that have not got any pads and wire them up.

 

[angellonewolf]

any up dates ?

 

[addjunkie]

I admire anyone who can fix this devils jiggery pokery...my old man had a tv rental buisness...one of the guys who used to work for him fixing tvs would take stuff like this that was broken and check it component by component. When the buisness was wound up he made a living doing it. Not a qualification to his name. It just all makes sense he used to say. Sadly the big c got him about 10 years ago.

 

[Allthegearnoidea]

Fantastic to see these repair. If you haven’t already done it this would be great for a YouTube channel to see you repair these. I’m really an X electronics engineering as my main job is move paper around.

 

[HughF]

Been away from the office for a while so haven't had a lot of opportunity to press on with this but we're approaching completion now. The new hv400 driver is on the way from China and I've just got to figure out the diodes and solder them down then we're done.