@longoverdue we would need to know what regulator your Onkyo is using. If it has a thermal shutdown, then yes it will. Most voltage regulators do not have a thermal shutdown so if you get into a thermal runaway and this exceed the maximum temperature your voltage regulator will usually go up in a puff of smoke. Going by your data I would replace the regulator and install a heatsink for it. Go with something like a NJM79M06 which looks like it was used on your board anyway and according to your schematics should fit. See what that will give you. Get the data sheet and the part if needed [https://www.mouser.com/ProductDetail/NJR/NJM79M06FA?qs=GNeTCC5Ivi7FmmUi%252BsDS6A%3D%3D|from here]
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@longoverdue we would need to know what regulator your Onkyo is using. If it has a thermal shutdown, then yes it will. Most voltage regulators do not have a thermal shutdown so if you get into a thermal runaway which exceed the maximum temperature your voltage regulator will usually go up in a puff of smoke. Going by your data I would replace the regulator and install a heatsink for it. Go with something like a NJM79M06 which looks like it was used on your board anyway and according to your schematics should fit. See what that will give you. Get the data sheet and the part if needed [link|https://www.mouser.com/ProductDetail/NJR/NJM79M06FA?qs=GNeTCC5Ivi7FmmUi%252BsDS6A%3D%3D|from here]
@longoverdue we would need to know what regulator your Onkyo is using. If it has a thermal shutdown, then yes it will. Most voltage regulators do not have a thermal shutdown so if you get into a thermal runaway and this exceed the maximum temperature your voltage regulator will usually go up in a puff of smoke. Going by your data I would replace the regulator and install a heatsink for it. Go with something like a NJM79M06 which looks like it was used on your board anyway and according to your schematics should fit. See what that will give you. Get the data sheet and the part if needed [https://www.mouser.com/ProductDetail/NJR/NJM79M06FA?qs=GNeTCC5Ivi7FmmUi%252BsDS6A%3D%3D|from here]