Good morning, I would like to know if any of you know how to activate this power supply to check its operation. At the moment I am not getting voltages on all the pins, much less on the CN904 +31.5v pins. I hope someone can help me. Thank you!
There look to be two separate SMPS supplies on that board. It is very likely the high current 31 volt supply is turned on and off under control of the microprocessor that will be located elsewhere in the equipment.
Some of the many rails will be switched on and off to save power when the unit is in a standby state.
To use the board independently you will have to look to the original equipment it was fitted to and figure out the required control signals.
Some of the many rails will be switched on and off to save power when the unit is in a standby state.
To use the board independently you will have to look to the original equipment it was fitted to and figure out the required control signals.