I get -70.4 volts measured directly acroos the speaker terminals..
I removed the NE5532 and the voltage drop to -50.3 volts..
All outputs test fine..
On the pads for the NE5532 i get the folloing voltages
Pad 1:-0.58
Pad 2:-8.32
Pad 3:0.00
Pad 4:-49.6
Pad 5:0.00
Pad 6:0.00
Pad 7:0.00
Pad 8:48.8
Does it appear that the regualtors have failed??
I removed the NE5532 and the voltage drop to -50.3 volts..
All outputs test fine..
On the pads for the NE5532 i get the folloing voltages
Pad 1:-0.58
Pad 2:-8.32
Pad 3:0.00
Pad 4:-49.6
Pad 5:0.00
Pad 6:0.00
Pad 7:0.00
Pad 8:48.8
Does it appear that the regualtors have failed??
Replaced the regulators LM317, LM337,
Also replaced the TL072 that sits behind the RCA Jacks. The NE5532, R138,R139..
Replaced all the 10 ohm resistors on the preamp board..
I didnt plug the preamp board in yet i powerd the amp up and Got + -15 volts on the op-amps but after a min the regulators failed again..
Any ideas what to check?
Also replaced the TL072 that sits behind the RCA Jacks. The NE5532, R138,R139..
Replaced all the 10 ohm resistors on the preamp board..
I didnt plug the preamp board in yet i powerd the amp up and Got + -15 volts on the op-amps but after a min the regulators failed again..
Any ideas what to check?
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