Ronan Kelly
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I have a Nordelettronica NE143_DU caravan / camper charger that is faulty. On power up, it outputs 12.3V for 2 seconds and then the voltage drops to 11.5V and three seconds later, it shuts down. When it shuts down, the output voltage goes to zero and the Red LED on the control board comes on. I checked the transformer, TR4 and the 12V supply to the control circuitry is ok and I have changed C11 (1uF 250V). Does anyone have a circuit diagram, circuit description or fault finding guide for this power supply? Thanks.