Beautiful electromagnetic oven, c21-sh2128 fan does not turn
The circuit elements of the fan are damaged; (clearly, the circuit is cleaned from the fan, the component is checked, and the circuit of the general fan is a separate circuit)
Fan is too greasy, (the possibility of home will not be great, we have spent three years, all nothing), if so, try to clean it, and then no, then only the fans.
The fan rings;Fault phenomenon: fan not to turn (the indicator light is normal). Fault analysis: according to the principle of induction cooker, the cause of the malfunction can be divided into two kinds:First, if the induction cooker can be heated normally, and the fan does not turn. It shows that the 5V power is normal and the 18V power is normal. The fault range shall be in the fan control circuit and the fan itself.Two, if the induction cooker can not be heated normally, and the fan does not turn. It shows that the fault occurs on the 18V power supply and the microcontroller.Fault circuit inference: 5V voltage regulator circuit, 18V voltage regulator circuit, fan circuit.Maintenance guidelines: power measurement, 18V power supply, output voltage 18.01V normal, in the boot state measurement of Q10 (D667) triode B pole voltage of about 0.7V normal. Use tweezers short circuit triode D667 CE pole, the wind is running normally. At this point, it can be inferred that the fault should be a Q10 (D667) fault. Take off the D667 measurement and find that the BC is open, replace the test machine and confirm the troubleshooting.If in the warranty period, go to the maintenance station to repair it, but the general district has the maintenance of small household electrical appliances, change for about 40.
