Hello Everybody,
I`m having problems with an SMPS I pulled from an LCD monitor. The supply has two outputs: +12V and +5V, and both indicate proper voltage when measured without a load. When I put a load on it (12V 0.3A fan), it goes into Auto-Restart mode and starts cycling twice a second or so. I tried replacing all elecrolytic capacitors, tested the two dual Schottky rectifiers (temporarily replaced them with others to be sure), but nothing has changed. It starts working with a smaller load (0.125A) and keeps working upto 0.3A, but then starts cycling again. Thought there might be a weird short somewhere on the secondary side, so I tried testing the feedback voltage, which should start the Auto-Restart mode at 4,5V, but it hasn`t even reached 1,5V. The supply is an LG p/n:6870T445D10, the switch controller is ICE 2ASO1. Any help and ideas are appreciated.
I`m having problems with an SMPS I pulled from an LCD monitor. The supply has two outputs: +12V and +5V, and both indicate proper voltage when measured without a load. When I put a load on it (12V 0.3A fan), it goes into Auto-Restart mode and starts cycling twice a second or so. I tried replacing all elecrolytic capacitors, tested the two dual Schottky rectifiers (temporarily replaced them with others to be sure), but nothing has changed. It starts working with a smaller load (0.125A) and keeps working upto 0.3A, but then starts cycling again. Thought there might be a weird short somewhere on the secondary side, so I tried testing the feedback voltage, which should start the Auto-Restart mode at 4,5V, but it hasn`t even reached 1,5V. The supply is an LG p/n:6870T445D10, the switch controller is ICE 2ASO1. Any help and ideas are appreciated.