i picked up this 5-ch amp the other day when i first opened it i found a shorted output in the 4-ch section. all the resistors and drivers checked out ok so i replaced the shorted output (2SD718) and now the 4-ch section works perfectly. so i started testing it out and when i plugged my rca's into the subwoofer section the muting relay started to switch on and off and the protect light will blink. i removed 2 of 5 outputs (IRF9640/640) to get a more accurate reading and they seem ok so i reinstalled them. i currently have the driver board removed, i haven't pulled any of the parts from the driver board yet. i was curious so i powered the amp up with the driver board removed and plugged in the rca's now it will stay on. this is basically 2 amps in 1, it has 2 seperate power supplies and everything. it pulls a little current when powered up but i figured it was probably normal because it's just like powering up 2 amps.
The broken tab won't matter if the tab doesn't short to the heatsink.
I'm assuming that all of the circuit boards were in the amp when you were looking for the square wave.
Post the DC voltage on the B52 IC.
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
I'm assuming that all of the circuit boards were in the amp when you were looking for the square wave.
Post the DC voltage on the B52 IC.
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
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