@alperbeysim here is the service manual for this series. Remember that it shares the amp board where your transistors failed,with a few other models in the series. I would start by checking that particular board. That schematic is identical in that series. The power supply etc may have some differences but you can check those against your boards. the voltages etc. will most likely show faulty or as not existent because there are still faults on the board. I would not expect those to be accurate.
I could not add the file on here due to its size (33MB) https://drive.google.com/file/d/18cD6XtJ5Zuypfqvq4kao9_eRxcuhSrTi/view?usp=sharing