Pcb repair

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Hey guys...this project isn't something terribly important. It's just a spare board that was from a dead unit I had lying around, that I would poach parts off of and learn on, especially how multi-layered pcb's work and how the traces can short out between the layers and how to fix it. So I thought id use some spare parts I have accumulated over there years and create a working unit. All the while trying to optimize performance and make some experimental changes to each section (mic preamp, compressor, eq, master out). So with $0 dollars spent, I managed to trace the short in between the layers, repair all the ripped off pads and traces, make some changes, get it operational, AND learn alot from you guys here on this forum. So thank you everyone!
Yes, one of my customer also try to change. Recently, he let us help him to change THT to SMT.
 
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