Careful examination , no abnormality was found , with the multi-function table and inspected one by one , did not have serious short circuit parts , reloading with the specifications of the fuse , the power to try , "pop" sound, the fuse has blown . Then measure some circuit and found no abnormalities . One by one off the fan motor , quartz heating tubes , transformers and other components, but the electricity is still burning fuse , indicating nothing to do with these parts. However, when detected , open the door and then power it will not burn the fuse , but also normal light bulb , but the moment you close the door burned fuse.Ck4service manual download site
So the control circuit diagrams and detailed analysis , the measurement that S1 is disconnected when you open the door , shut the door when turning ; S3 is turned on when you open the door ac, ab turned off when the oven door closed when that pick into S1 pass, this time a turn c S3 is turned ON by the b. Obviously, with the S3 segment of the c- terminal connections are redundant , so that when the S3 may be converted by the poor in a long time with the door closed when the switch S1 is switched on , and S3 has not been received from a c b state to pick a state , causing a short circuit. So unplug the connection port c switch S3 segment ( kind of a red and blue lines twisted together and then insert the switch c -side ) , the figure is about to hit the "×" at the open, so that everything is normal and then use electricity .Ck4service manual download site