It is not heated and the indicator light is not on
If it is not heated and the indicator light does not light up, it means that the temperature fuse FU and function selection switch S are abnormal.
It is not heated, and the indicator light is on
It is not heated, but the indicator light is on, indicating that the heating plate is abnormal. After the power is off, check the resistance value of the heating plate EH with the pointer multimeter R 10 or the digital multimeter 100 gear, if the resistance value is infinity, it means an open circuit and needs to be replaced.
Do not steam and stew
The reason for the failure of not steaming and stewing is mostly the abnormality of the rectifier tube VD4.
During maintenance, use the diode block of the digital multimeter to measure its positive and negative conduction voltage drop, if the conduction voltage drop value is infinity, it means that the rectifier tube has been opened, and the fault can be eliminated by replacement.
The insulation function fails
The main reason for the failure of the thermal insulation function is the abnormality of the thermal insulation thermostat ST2, which can be eliminated by repair or replacement.
The heating is normal, and the indicator light is not on
If the heating is normal, it means that the rice cooker is basically working normally, and the heat preservation indicator LED2 is not lit, indicating that the current limiting resistance R2 in the indicator circuit is abnormal. Due to the long working time of LED2, the power consumption of R2 is larger, and the power of the original resistor is smaller, so it is easy to be damaged. When servicing, a 2K resistor with a power of 2W should be replaced.
Undercooked or raw
The main reasons for undercooked cooking or pinching failures:1The performance of the magnet in the magnet thermostat ST1 decreases, 2Heating plate EH or inner pot deformation.
After checking the EH and the inner pot is normal, replace the magnet. If the EH is slightly deformed, it can be corrected by grinding and corrected; If the deformation is severe, it needs to be replaced. The deformation of the inner pot can be corrected to eliminate the fault.