Michael black
- Jul 7, 2015
- 5
- Joined
- Jul 7, 2015
- Messages
- 5
hi all bought a cople of power supplies of eBay (they were cheap honest) They both have the same fault that the voltage from the outputs don't match the marked voltage. This doesn't bother me too much I can use a multimeter to ensure I have the voltage required. The main problem is it's a 130 VA supply but at 12V and 2A the voltage drops off. Looking inside the power supply it's a transformer with 3 tappings and 4 relays change the voltage for the ac output, the DC output is a bridge rectifier straight from AC to DC.
The centre circle on the board is where the rotary switch goes.
what in the circuit can caus that fault
The centre circle on the board is where the rotary switch goes.
what in the circuit can caus that fault