The amplifier turn on but does not give any audio output, there are 2 transistor that start warming up as soon the amp. is turned on.
These two transistor (visible in the first photo on imgur) overheat to the point that they are totally untouchable for minutes after turning it off
[Photos] https://imgur.com/a/ls9TJQa

[Schematics] https://docdro.id/y6Oq4FN
[Schematics] https://docdro.id/0Dl8YwI
[Schematics] https://docdro.id/oZmEhk4

Technics Stereo Integrated DC Amplifier SU-V4

 

What are the numbers of the transistors on the circuit diagram?

 

What are the numbers of the transistors on the circuit diagram?

Q401 - Q402
I highlighted them in the schematic but forgot to write them here

 

That's the +/- 16V supply regulators, something is tsking too much current.

 

That's the +/- 16V supply regulators, something is tsking too much current.

Do you think they broke by the overload of current?
Could it be that the power supply is faulty? And if something is shorted how could I check, by looking everything seems fine
Maybe I should give up

 

You need to disconnect the 16V supplies to the outputs, and measure it, then reconnect each stage one at a time to see what is pulling it down.

 

Do you have a voltmeter? If so, measure the voltages at the emitter of Q401 and Q402 in reference to chassis ground. Leave the unit on only as long as necessary to make the measurements.

 

Hello,

@Ylli , on the pictures I see a samwa analog meter.

Bertus