Hi
I am working on the above mentioed power amp. It is a class H amp. The problems are:-
1) Channel 1 - There is no sound. The red "Clip", the green "Signal" and the red "Protect" LEDs are permanently ON. The green "Active" LED is OF
2) Channel 2 - When powered ON, the red "Clip" and "Protect" LEDs turn on and after about 2 to 3 secs, both the red LEDs turn off and the green "Active" LED comes on and there is sound. Then after about to 20 to 30 secs, the "Protect" LED starts to flicker and then comes ON steady, after about a sec later, the relays clicks OFF, the "Active" LED turns OFF and the sound goes OFF.
Can someone guide me on what can be the problem or what should I check.
Thanks.
I am working on the above mentioed power amp. It is a class H amp. The problems are:-
1) Channel 1 - There is no sound. The red "Clip", the green "Signal" and the red "Protect" LEDs are permanently ON. The green "Active" LED is OF
2) Channel 2 - When powered ON, the red "Clip" and "Protect" LEDs turn on and after about 2 to 3 secs, both the red LEDs turn off and the green "Active" LED comes on and there is sound. Then after about to 20 to 30 secs, the "Protect" LED starts to flicker and then comes ON steady, after about a sec later, the relays clicks OFF, the "Active" LED turns OFF and the sound goes OFF.
Can someone guide me on what can be the problem or what should I check.
Thanks.
Check there is no shorts at the speakers, there is probably a thermoswitch or sensor on the heat sink near the power transistors if it has them if is not an ic poweramp. The bias could be out or the power transistors could be gone and cooking. That's just a guess