BjoernGeller Posted February 21, 2019 Share Posted February 21, 2019 Hi there, the power supply doesnt have either + nor - 45 volt power supply present. The other voltages are OK. First question, for a working unit should there be +-45volt present at the output of the power supply or is there a possibility that it is switched off due to some settings on the amp? Does anybody have experience in fixing the power board and can recommend where to look as I dont have a schematic. I suspect that the fault is in one 8 pin chip: 5181 PQAC it gets the output signals from the SG3525AP but I could not find the 5181 anywhere. Does anybody know what that chip actually consist of ??? bg@bgcontrol.com Quote Link to comment Share on other sites More sharing options...
manolonte Posted November 16, 2021 Share Posted November 16, 2021 Hi, did you manage to fix your AMPLIFi? Mine has a blown transistor, close to that 5181 IC. So blown that I cannot identify it. Can anybody tell me what transistor is in that position? It is the only non SMD transistor, at the other side of the two big capacitors, where I have put the socket you can see in the second picture. Thanks in advance, Manuel Quote Link to comment Share on other sites More sharing options...
Frazierf1 Posted August 4, 2022 Share Posted August 4, 2022 Thanks for sharing, I found a lot of interesting information here. A really good post, very thankful and helpful that you will write many more posts like this one. Quote Link to comment Share on other sites More sharing options...
Joe756 Posted September 2, 2022 Share Posted September 2, 2022 I am trying to do this also and getting the same response. My Ascension Employee Portal Quote Link to comment Share on other sites More sharing options...
Joe756 Posted September 8, 2022 Share Posted September 8, 2022 I have the same problem and really know ***** I do not know what to do I can not find a solution help me Marriott Global Source Quote Link to comment Share on other sites More sharing options...
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