Hi everyone, I bought an old technics sa-eh760 for a good price and it all seems to be working fine and sounds great. But I have a concern the amp seems warm which is fine but one particular area is red hot, I only noticed it because I picked it up to move it a little and underneath in one corner it was extremely hot. I took the cover off to investigate and found a component that's a pcb with 3 transistors and a heat sink/clamp, what is this? A voltage regulator? And should it get hot? The transistors are d2734 and 2 b1548, they are marked q701 q702 and q711.
Many thanks Ben