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| When things go very bad http://www.dcaudiodiy.com/phpBB3/viewtopic.php?f=5&t=1329 |
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| Author: | Pelliott321 [ January 11th, 2019, 2:44 pm ] | ||
| Post subject: | When things go very bad | ||
I took on a simple repair job for a client. I had to replace a USB connector on a USB receiver board on a music server. I did not take pics of the mangled connector befor I removed it. but here is the completed repair.
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| Author: | Pelliott321 [ January 11th, 2019, 2:49 pm ] |
| Post subject: | Re: When things go very bad |
when I was putting things together and connecting a 12 connector cable to the other side of the board the socket just popped off. Attachment: fix2.jpg [ 333.22 KiB | Viewed 19113 times ] Attachment: fix3.jpg [ 191.48 KiB | Viewed 19113 times ] here is a close up Attachment: fix4.jpg [ 233.65 KiB | Viewed 19113 times ] |
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| Author: | Pelliott321 [ January 11th, 2019, 2:53 pm ] |
| Post subject: | Re: When things go very bad |
To me the pads look like cold solder joints. Any way it was a pain getting this soldered back on Attachment: fix5.jpg [ 227.14 KiB | Viewed 19113 times ] Instead of a 15 minute repair it was a 30 minute repair Don't know if I will recover from this disaster today |
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| Author: | SoundMods [ January 11th, 2019, 3:43 pm ] |
| Post subject: | Re: When things go very bad |
Pelliott321 wrote: when I was putting things together and connecting a 12 connector cable to the other side of the board the socket just popped off. Attachment: fix2.jpg Attachment: fix3.jpg here is a close up Attachment: fix4.jpg HOLY CRAP!!!! Cold solder joints all! Murphy's Law at work. |
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| Author: | tomp [ January 11th, 2019, 6:05 pm ] |
| Post subject: | Re: When things go very bad |
If anyone ever needs to repair a board with surface mount components I have a hot air re-flow station you can use. |
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| Author: | Pelliott321 [ January 11th, 2019, 10:34 pm ] |
| Post subject: | Re: When things go very bad |
One does not need fancy equipment to do surface mount work |
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| Author: | DaveR [ January 12th, 2019, 10:17 am ] |
| Post subject: | Re: When things go very bad |
Pelliott321 wrote: One does not need fancy equipment to do surface mount work No, but it sure helps make it much easier. |
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| Author: | tomp [ January 12th, 2019, 12:37 pm ] |
| Post subject: | Re: When things go very bad |
DaveR wrote: Pelliott321 wrote: One does not need fancy equipment to do surface mount work No, but it sure helps make it much easier. Amen to that |
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| Author: | Pelliott321 [ January 13th, 2019, 8:59 am ] |
| Post subject: | Re: When things go very bad |
Part of my problem besides being _______(you an fill in the blank), is I really do not understand how the hot air thingy works or how to use one. I guess this is a good one for YouTube |
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| Author: | SoundMods [ January 13th, 2019, 1:06 pm ] |
| Post subject: | Re: When things go very bad |
Pelliott321 wrote: Part of my problem besides being _______(you an fill in the blank), is I really do not understand how the hot air thingy works or how to use one. I guess this is a good one for YouTube I don't envy your task -- I am imitated by surface-mount anything. Specialized equipment is required. During manufacture -- the parts are loaded using robotics and then flow-soldered as a unit. Apparently, the device you are working on would have benefited by a hole-through version of the multi-pin connector. Looking at your photos it seems to me that you can clean the pads and connections of solder -- set the connector in place and hand solder each pad individually with a solder pencil. I would wear a jewelers bi-optic magnifier to get a close look while working. I believe you can pull it off. Once you solder tack the first pin -- that will anchor the connector which will enable working on the rest of them. I think if you try to re-flow them as a group you may still end up with cold joints that will not be reliable. |
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