bo1206 Posted April 13, 2015 Report Share Posted April 13, 2015 Hello All, I have an emerald spa with a balboa 52014 control board with DS4R3 chip. I am getting a no boot situation on the logic board. I get 240v to the board itself and the voltage out of the transformer is showing 7v and 14v as i understand it should, but no red LED on the control board and nothing on the topside display itself. Fuses all seem to be okay. I tried to check the voltage to the 7805CT regulator but no reading. Maybe I checked it incorrectly... I also am not familiar with the circuit and could not find a schematic to check where its supply rail was coming from. If any one has some advice that would be awesome! thanks! *EDIT* both of the yellow 2A pcb fuses seem to have been blown. replaced.. still no power. Quote Link to comment Share on other sites More sharing options...
bo1206 Posted April 16, 2015 Author Report Share Posted April 16, 2015 Progress... if i take a 20v DC power supply and connect to the regulator at U13... i get 5 volts DC from the output of the regulator. The Red power light comes on for a second with a click.. then another click and its off. Quote Link to comment Share on other sites More sharing options...
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