Hello dear
I have a sat recever with this power supply
All rectifier diodes burn and i replace them and also 5l0380 R was burned
and i change it with a new one but it burn.
I checked all components around it and semes theme's correct
What causes the switch IC to burn
The pictures in attachment
Thanks in advancd

 

ARe you sure you purchased the ic from trusted supplier?, can you try different ic?, another trial?, hopefully from different supplier?
Are the doided after the transformer ok?

 

Hi,
Can you tell us the make and model of your sat receiver please.