[xsdb] had a absolute problem. His JBL L8400P 600 watt subwoofer went up in bonfire – literally. Four of the ample capacitors on the lath had arched and leaked. The electrolyte again acquired a abbreviate in the mains AC area of the board, consistent in a blaze up. Thankfully the bonfire were independent to the amplifier board. [xsdb’s] house, possessions, and subwoofer asylum were all safe. The amplifier lath however, had apparent bigger days. Best of us would accept cut our losses and bought a new setup. Not [xsdb] he took on the best acute PCB adjustment we’ve apparent in a continued time.
After removing the behind caps and a few added components, [xsdb] got a acceptable attending at the damage. the PCB was burned through. Charred PCB is conductive, so annihilation atramentous had to be cut out. The aftereffect was a rather ample aperture in the average of an contrarily advantageous board. [xsdb] had the account chiral for the JBL sub. Amazingly, the chiral included a lath blueprint with traces. Some accurate Photoshop assignment resulted in an angel of the area of PCB to be repaired. [Xsdb] acclimated this angel to compose a baby application board.
The amplifier and application were formed and sanded to bout up about perfectly. Incredibly, all the traces aligned. [Xdsb] soldered the traces beyond the accompany with baby sections of wire and adhesive wick. After soldering in some new aerial affection capacitors, the amplifier was aback in action!
If you’re a big fan of austere PCB’s, analysis out Hackaday Prize Judge Dave Jones latest EEVblog video, area he works on a Ness home anxiety console with a analogously adapted area of FR4.
[Thanks for the articulation JohnS_AZ!]
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