Found an lg42sl80 that was thrown out. I'm trying to learn how to repair modern sets and figured this would be a good way to do it. The set will not power up, it goes through a self check or something, relay clicks on cycles through the LEDs then clicks off again and repeats. At first look I found two shorted power mosfets and a fuse as well as a four bad caps, all parts have been replaced and I've managed to get standby 5v. I've downloaded the service manual and tried the procedure to power up the power supply, but no luck the 12v and 24v should come on but they do not.Readings on conector p201 are
Pin1 n/c Pin2 0 to 4.9v
Pin3 - 6 Gnd Pin7 - 10 5.0 to 5.1v
Pin11 - 12 Gnd Pin13 - 14 0v
Pin15 - 16 Gnd Pin17 - 18 0v
Pin19 n/c Pin20 0v
Pin21 .2v Pin22 0.7 to 3.0v
Pin23 n/c Pin24 0v
Been trying to figure it out for some time now, could really use some help.
Pin1 n/c Pin2 0 to 4.9v
Pin3 - 6 Gnd Pin7 - 10 5.0 to 5.1v
Pin11 - 12 Gnd Pin13 - 14 0v
Pin15 - 16 Gnd Pin17 - 18 0v
Pin19 n/c Pin20 0v
Pin21 .2v Pin22 0.7 to 3.0v
Pin23 n/c Pin24 0v
Been trying to figure it out for some time now, could really use some help.
Comment