I do not detect the failure in the first stage of power, I presume it has a burnt resistance, my multimeter cannot measure all the resistance, the fault it presents is the following, it sounds as if it lacks current, the positive transistors do not heat up, the voltage of the integrated one is in 22v they have two resistors of 3w2.2k so well I presume of an integrated 2n5551 that is close to the stage that does not fuse, after that transistor I have the following transistors that are good, they are two 2sa1930, the 2sd2241 that instead the factory d1414 and the 2sc5198 and then the c5200 which are four but I'm testing a positive one and a negative one, ,, when I cut the current it sounds good until the voltage ends and when connecting it sounds good for seconds and low the audio and sounds distorted as if it lacks power,