Hi,

Some time ago we sent a blown PCB to a repair company , in the report it states capacitors fatigued and need replacing / bridge rectifier suspect and needs replacing / optus needs replacing ?

Whats an optus or is it an abbreviation for a component ?

I have looked and looked online but just keep going around in circles ,

Please see attached pictures showing the PCB,

Any help would be great

Darren.

 

hi,
Opto's are opto couplers.
E

 

The four pin devices, 2 at top left, 3 at bottom right.
On first board.
Max.

 

Hello,

U3 - U8 P701 are also optocoupler, but they can drive a mosfet/IGBT.
The other five are EL817 optocouplers.

Bertus