After successfully building and tuning my QMX+ (V2 PCB), after a day's use I've done it again and blown something up! I managed to accidentally 'wiggle' the 12V connector with the radio on while leaning over it and trying to plug in a PC monitor (to something else!) - in other words, I was being careless.
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The rig was connected to a power speaker, so a few loud crackles from that, then it was dead.?Now when I reconnect to a current limited PSU, pressing the on switch on the top encoder causes the supply voltage to short to ground somewhere. So something's blown that shorts the 12V line - I think.
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With the 12V supply shorting as soon as I press the 'on' button, nothing powers up at all - it's completely dead.
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No signs of damage or burnt components found, tracks all look ok and no familiar burnt plastic smell. I've checked all the diodes and components around the integral SMPSUs - all seem ok.?
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If anyone has any pointers on what to look out for, any info. on what to check next would be appreciated!
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Many thanks,
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Steve MW0KST
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