Induction cooker is one of the necessary appliances in modern living and kitchen cooking, but for various reasons, in the process of using induction cooker will inevitably occur some failures. So in the face of these sudden induction stove failure, we should do? If you can master the following knowledge in advance, you can easily cope with it Oh.
Induction cooker drip ring does not heat how to do
Induction cooker drip ring does not heat this means that the induction cooker does not detect the load pot caused by the basic structure of the household induction cooker: induction heating control board, line tray line tray in the middle will have a sensor, with heat dissipation oil glued to the induction cooker glass steel plate above, this sensor is used to detect whether the induction cooker load with, so usually if the pot will be taken up drip ring, the consumer side should be this The sensor is loose, or the sensor fell off after the fall is not well glued to the glass plate above, if the warranty period has expired you can take apart and check is, or take to repair.
Not set the pot, the light is on, not heating how to do
1, the thermistor wiring is loose or damaged: re-plug or change the thermistor components
2, the integrated block LM339 bad or integrated block TA8316 bad: change LM339 or TA8316
3, transformer plugging bad: check or change the main control IC
4, the substrate components bad: change the substrate components
Induction cooker indicator light does not light how
220V AC power by 15A fuse and the main circuit rectifier bridge stack D1 ~ D4 rectification, into 3 (J0v DC voltage, and then filtered by C11 (4.7μF / 450V), all the way through the switching transformer T1 primary winding to the collector of the switching tube Q01 (FGA25N120); the other way through the starting resistor R11 (330kΩ) to the base of Q01, so that the T1 secondary winding on. T1 secondary winding voltage through D16 rectifier, c18 filter to get 18V. 18V power supply to the control circuit, in addition to the power supply to IC2 (7805), so that it gets the standard +5 V voltage.
Induction cooker to work properly, +300V, +18V, +5V these three groups of voltage is missing. Otherwise, the power can not be turned on. In the case of this induction cooker, +300V, +18V voltage is normal, while the +5V voltage is not, it is clear that 7805 damage, replace the troubleshooting. The root cause of 7805 damage is likely to input voltage of +18V, too high, too much power consumption. Check the information learned that most induction cookers in the 7805 input terminal plus a buck diode (about 8V). To this end, the addition of an 8V voltage regulator diode (ZD19), the fault is eliminated.
How to burn insurance and IGBT
Specific performance is no response to power, the machine does not work. We disassemble the machine, we will find that the insurance burst, and burst very powerful, the insurance of the glass wall are burst black. We further check, we will find that the IGBT under the large heat sink also breakdown, sometimes even the rectifier bridge also burned, but the rectifier bridge is much stronger than the IGBT, in general, only burn the IGBT.
Encounter this situation, we do not rush to replace parts to try the machine. Also check to see if there are other bad parts. The circuit of all the large resistance value of the large body type of resistance are measured once, and the drive IGBT of the two transistors (8050, 8550) should also be measured, and then look at the 300V filter capacitor and 0.33uF resonant capacitor has no bulge. If these are no problem, in addition to the IGBT all the bad parts are replaced with new. The price is about 200 yuan.
In addition, some induction cookers purchased back is a warranty period, within this period of repair is not charged or very low cost, you can go to the purchase of induction cooker location consultation.
