Experts,
I have a rotel rmb1575 which has 2 IcePower 500ASP and 3 500A modules. The amp is showing red protection on power up. I have the auto trigger off. I was troubleshooting and here are my notes. Initially I noticed that the surround speaker outputs were showing continuity. Others were not. Then I wiggled the inductor that was touching the terminals which seem to have insulated wires wound on a ferrite and then the short went away. This may indicate that there was a short which went away. I switched it on hoping that would be a fix but its not. How do I isolate if the issue is with modules or the rotel protection circuit or output boards. I also noticed that one of the 500ASP module showing a greed led on the board lit. The other board does not. Any troubleshooting steps to check and isololate. Thanks
I have a rotel rmb1575 which has 2 IcePower 500ASP and 3 500A modules. The amp is showing red protection on power up. I have the auto trigger off. I was troubleshooting and here are my notes. Initially I noticed that the surround speaker outputs were showing continuity. Others were not. Then I wiggled the inductor that was touching the terminals which seem to have insulated wires wound on a ferrite and then the short went away. This may indicate that there was a short which went away. I switched it on hoping that would be a fix but its not. How do I isolate if the issue is with modules or the rotel protection circuit or output boards. I also noticed that one of the 500ASP module showing a greed led on the board lit. The other board does not. Any troubleshooting steps to check and isololate. Thanks
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Thank you. I just did some more troubleshooting. One of the 500asp module was not giving 80v 50v 12v outputs. And that’s the board that did not show the green led. So I guess since it’s not giving the required outputs it could be faulty. However the other module is working so is there anyway that I can disconnect the corresponding boards and make the 2 channels work. The protection circuit is complex and seems it’s all or nothing. Anyway to bypass the protection on other boards?
Oh well. The board that I mentioned earlier is spitting 40vdc at speaker terminals. So I guess both asp boards are out. I can’t make anything out of this. One board doesn’t give 80vdc 50vdc and 12vdc and the other one giving 40vdc to outputs. Guess I will have to drop the project.