Satellite receiver Power supply higher voltages output

How are you measuring those readings..?

 

Try measuring those voltages again with your black probe on the respective GND pins.

 

Perhaps but it might be different if you use the black probe on the reference "GND" that is adjacent to each 3v3, 5v and 12v etc.
23v is the far right, not the second as you have marked.

Which meter range are you using?

Edit...Cirkit...beat me by .......that much)

 

Meter on dc range..?
Meter tests ok..?
unusual for any reading to go higher than normal (within tolerances)
Input voltage/frequency match input requirements..?
Board looks to have been pretty warm around the switcher ic and associated bits.

 

Yes I did realise that.

I guess so but not the right values so something is amiss.

Still seems rather strange to have much higher indicated voltage levels.

Could be a fault somewhere in the feedback section.

 

What voltage do you measure at IC1? Does the capacitor next to it have a domed top - hard to tell from the photo angle?

Have you tested all the output diodes?

 

Look for details on the switcher (5L0365R) which should bring up a data sheet and a load of schematics.
Perhaps not exactly the same as your board but enough to get an idea of the layout.
I found a couple of videos but mostly Russian/Vietnamese so not much help but it does show it is a fairly common type of board.

 

If IC1 is a KA431 or similar, look at the values of the two resistors closest to it. You should be able to work out the set voltage.

 

Can you read the markings off the flat side of the component?

You will need to trace the resistors that form a potential divider for that IC. Watch the video above, you are looking for the equivalent to R204 and R205 connected in the same way to IC1 on your board.

 

Not the controller IC. The small 3-pin component marked IC1 next to it.

 

Now find the two resistors that form the potential divider for that part.

How did you measure the capacitor? Was it discharged first, in-circuit?