CalcProgrammer1
New Member
My parents' Sony surround receiver has a problem. The center channel doesn't play any sound, only making occasional crackling noises when the volume is up. I took it apart, assuming that the output transistors may be bad. Tested all of them with a RadioShack Transistor tester and they all seemed to work. I then switched a pair of them on the board (assuming left and center, swapped them) but wasn't too sure which sets of transistors went to which channel. Either way, after swapping it did the exact same thing (all channels but the center worked fine). Is there any chance that it is the output transistors or is it probably something else (digital signal circuit or something like that)?