I am looking for a circuit diagram for a Boshert 3T20AP-6115 Power supply - 60v input , up to 15v O/P @ 20amp

Sorry Gregory, gave you the wrong number.
You could try something like this. Various voltages and currents with different adapter plugs. This is on Ebay UK but I would think there are others, don't know where you are.
Ebay item number: 201154296095

Specs:
1.Rated Input Voltage: AC 110V or AC240V
2.Vibration Input Voltage Range: AC95V-265V
3.Input Rated Current: 0.4-0.6AMP
4.Input Power: 90W
5.Efficiency: >88%(TYP)
6.Out Power: 90W
7.Output voltage: 15V/16V/18V/19V/20V/22V/24V(0/+0.5V NOLOAD): DC15V-24V
8.Output voltage: 15V/16V/18V/19V/20V/22V/24V(-0.4/0.5V@rating load): DC15V-24V
9.Output current: 15-20V/4.5A@22V-24V/4.0A: 4.5AMP(max)
10.Overload protection: YES
11.Short Circuit Protection: YES

Replace the circuit breaker

Apart from the fact that there's NO information, Behringer+No input Signal=Low Voltage +15V -15V power supply issue.

If no fuses blown you probably have an issue on your +15V and -15V power supply regulators, this can be tested by checking opamps supply voltage which should be +15V at pin-8 and -15V at pin-4, let me know further.

I have the same problem. As I see, here is dead sub PCB with microcontroller on board. Small PCB with 26 pins, mounted verticaly on main, big power supply board. It is not available as a spare part. You must buy complete power supply board LJ44-001444A, as I have done.

Higher voltage then required is not so recommended, internal circuit may over voltage driven. some power amp max limit may fall within 18V only. See this link If your speaker power less then 30w you can choose 15V 2A will do or else select higher spec.

Hi,

First you have to check the power supply, look if the two voltages (+ and -) are equal. For example -85V and +85V.
If thats OK, you can look if the low voltages (example -15V/+15V) are OK. If those voltage are correct, you have check the outputtransistors.

Regards,
Gerard

The adapter in question has the following specs:
Input: AC 120V 60Hz 30W
Output: AC 15V 1500mA 22.5VA

I'm afraid I cannot comply with your wishes, as there are copyright laws governing this, for one. (For existing circuitry)

Two, there is the liability issue. Take for example that I design the requested circuit, give it to you freely, and you or someone in your group is injured using my circuit.

Will state that this is a basic circuit design. I believe that if you 5 put your minds together, you can build this circuit.

that power supply is a switch mode power supply,which means it looks for an input signal to turn on.
that signal comes from the main pc board.
if there is excessive current draw,it will shut down.
check the input,and the screen circuit it is driving