Sony TA-AX7 Transitors get hot

[T1996]

Hello,

I have a Sony TA-AX7 and two transitors (q503, q504) get very hot. Which results in that the amplifier gets almost too hot to touch, even idle. I checked and set the bias and dc offset according to the service manual and this didn't solve the issue. Besides that I replaced most of the electrolyte capacitors.

Currently i don't what could cause the issue, so help would be really welcome. Do you have any idea what i can check right now to identify what is causing this?

in the link i have put the schematic diagram, the problematic transistors can be found at location 5E.
https://drive.google.com/file/d/1O7wI6JUG9XQXtGd6wcJpUlzFEUOQUCg0/view?usp=sharing

Thanks in Advance!

 

[clinic-audio]

Hello T1996

One channel only ?
Which circuit ?

Welcome on AK

 

[T1996]

both the channels get very hot.
The service manual refers to them as "current reg", so I assume current regulators.

 

[T1996]

I checked the drawings again and it seems like a modification has been made to the circuit. There are two capacitors of 10uf added which are not mentioned anywhere in the drawings. It will go back to the ground I assume.
In the attached image I added this part in green. Can I remove this safely or does it have an important function?

Next to this I measured the voltages, those where slightly off and I have added those in red.