I’ve repaired a few Teco vfds lots of sm components on them…rewound a couple of transformers too from the power supply section….that was challenging…!I can honestly say I've never seriously tried repairing surface mount boards - anyone here good at it?
That’s the way I do it too, although a Dremel with a disc works….Easiest way to replace that chip would be to run a scalpel down the legs right next to the package. Cut the body off and then you can desolder the pins one by one and clean up the pads.
Yes that was my first 'proper' job in electronics. Still do a fair bit of surface mount prototyping now.I can honestly say I've never seriously tried repairing surface mount boards - anyone here good at it?
The JBC Tools website has some videos of their SMD rework stations in use:I've got a JBC Nase rework station
No!Can't you just remove the rest of the chip with side cutters, and leaving the leads sticking up
solder onto them ?
They are in my opinion the bees knees - haven't found (nor actually wanted to look for) and alternative for SMD rework. The nicest feature of them is the quick change cartridge tips, you can simply slot it into a hole, pull, and it disconnects, push a new tip in and away you go. Once they're back in the holder everything powers down so the tip life is extended and usually by the time you've brought the tip from the holder to what you're working on you're not far off up to temperature even if it's at ambient.The JBC Tools website has some videos of their SMD rework stations in use:
They make it look so easy.NASE - 2-Tool Nano Rework Station
www.jbctools.com
Recently I walked past one of the ubiquitous "We repair your mobile phone" shops ( in Union Street, Reading ), and was impressed to see a very well-equipped work area, with a multi-tool rework station and a very powerful-looking binocular stereo microscope.
Recently I walked past one of the ubiquitous "We repair your mobile phone" shops ( in Union Street, Reading ), and was impressed to see a very well-equipped work area, with a multi-tool rework station and a very powerful-looking binocular stereo microscope.
Hot air can be handy for some jobs but I rarely use it. For leadless parts there's no alternative but I steer clear of those as much as I can.The JBC Tools equipment looks like a small version of a traditional temperature-controlled soldering iron, with single or double ( tweezer-style ) heating elements and bits. I had thought that SMD rework was done with hot air?
Not at all. I don't claim to be an expert (engineer rather than what I'd refer to as a technician*) but if it can be done with a soldering iron then it would be done. Obviously bigger (in pin count stuff) then hot air is useful.The JBC Tools equipment looks like a small version of a traditional temperature-controlled soldering iron, with single or double ( tweezer-style ) heating elements and bits. I had thought that SMD rework was done with hot air?
I'm 60 plus and did my time with the MOD, eyes not so good anymore, left hand a bit shaky too. might see if I can strip a board or two cleanly one night, just to start..Yes that was my first 'proper' job in electronics. Still do a fair bit of surface mount prototyping now.
It's not that hard, even now I'm 50+ and my eyesight is shot. Having proper magnification and lighting helps, I use one of these at work
Not cheap, but they do come up used from time to time.
Ther's a company who specialise in automotive ecu repairs, used to send me their broshure every year, they had a team of techs who would reverse engineer and fix most car ecu issues. don't recall their name though..Not at all. I don't claim to be an expert (engineer rather than what I'd refer to as a technician*) but if it can be done with a soldering iron then it would be done. Obviously bigger (in pin count stuff) then hot air is useful.
* My old job us engineers would occasionally get our hands dirty soldering etc., whilst designing a system but if it was a customer deliverable then we gave it to the technicians. They had various bits of paper accrediting them but more importantly they did it on a daily basis so were far more skilled. They also had Weller hot air pencils to assist but actually their most useful tool was a Metcal hot plate which isn't that dear. You place it under the PCB and it warms up the area you're working on (and the rest of the board eventually) to the point where the solder is just about to flow so that you can then tip the relevant components over the edge with either a soldering iron or hot air. Hot air on its own usually introduced too much localised heat.
They also had a couple of infrared BGA rework setups. By and large the stuff they worked on it was usually safer to destructively remove a device and replace it than try and reuse it. Connectors, if you could, they'd remove the shroud before desoldering each pin individually.
Hi
I got this Caddy ARC 251i welding machine. Phase hit PFC board's 17AP1 IC1 chip. Can anyone help me to identify it?
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