Need some assistance

[SB71]

I am repairing a board where not only did I remove the pads I also removed some traces - I am fairly new to this and could use some assistance on how to get this working again!

Many thanks!

 

[starLED]

Are the hole traces from the back side of the board damaged?

Do you have any experience in soldering?
If not, better take it to some repair shop, cause it's not an easy and fast repair for novice, you could damage the board beyond repair.

 

[ZipZapOuch]

You can run a copper wires from the center of your 3-hole component to the via (the solder filled hole in the board to the bottom left of the number 5.

Then you can use a raserblade or razor knife held 90° to the board and scrape off the green coating (solder mask) that runs through the middle of the "P6" label (or, better, just to the left of the P6 label. Then you can solder a jumper wire from the right hole of your 3-hole component to that scrapped line. Be careful not to scrape through the copper (difficult if you keep your blade 90° to the board). Also, done scrape any copper above/below the trace that runs through the center of the P6 label.

The left hold will have to be addressed from the other side of the board - I don't see that any copper traces are connected to it on the side shown.


When you do try to solder these jumpers, melt a bit of solder to the bare stopper that you scraped clean. "Tin" the end of your stripped jumper wire with a bit of solder. Then, set down your solder spool and just melt the tinned wire end to the solder on the trace. Easy. No need to get anything too hot. Don't hold the iron in there too long or you'll melt the solder mask or (mod damaging) you'll melt the glue holding the copper to the board. Dont heat more than 5 or 6 seconds. Let everything cool down and try again about 2 minutes later if you fail to get solder to wet-out a surface.

Also, try cleaning the surface with a scotchbrite pad, better scraping or post your troubles for more recommendations.


Always use a clean solder tip, don't get oxidation in your traces or other components. Wipe your solder tip across a damp sponge regularly to remove oxidation. Do that every time you pick up your soldering pencil(iron).

 

[ahsrabrifat]

In the second image, it looks like multiple pads and traces are missing at P6. Identify where each missing trace was initially connected by following nearby components. If available, use the schematic (I think you don't have that). Remove any burnt or lifted PCB material using a fibreglass brush or fine sandpaper. Use isopropyl alcohol and a soft brush to clean the area thoroughly. If you need to restore a soldering pad, use a small piece of copper tape or a thin copper wire and secure it with super glue or epoxy. Tin the copper with solder before attaching a wire. Use thin enamelled copper wire (30-32 AWG) or PCB repair trace tape to reconnect the broken traces. Scrape away the solder mask on the remaining good trace to expose the copper. Solder the thin wire from the exposed copper to the missing pad location. After making the connections, insulate them and prevent future damage. Finally, test the continuities of the traces with a multimeter. Here is video on how to repair broken traces:

Here is also a good write-up on PCB Corrosion: Causes, Prevention, and Repair, you may find it helpful for the future.