Ok guys I have a JBL GTQ 400 with i believe a power supply issue. If i supply 12v from my power supply once the remote turn on is applied it drops voltage to 6v to 7v. Any ideas? The mosfet's seem not be shorted.
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If the excessive current draw only occurs after remote is applied, the problem is generally shorted output transistors but could be other problems like incorrect bias setting, bad/dirty bias pots, shorted rectifiers, shorted transformer...