I am engaged in the repair of the receiver Rankarena R2025.
What diodes can be replaced by a diode D1 (KB262)?
Should the diode D1 (KB262) have thermal contact with the radiator of the output transistors?
Thanks for the answer.
Here is a photo of the amplifier. Small peas with an orange dot are D1.
As I understand it, for the stable operation of the output transistors, a thermal contact between D1 and the radiator is necessary.