V In the IGBT base, the third pin of the LM339, the fan input pin, and the four feet of the transformer, one foot is 18V. Third leg of the 5V line, rowIn the middle of the line, the panel master IC will be measured.
The internal cooling fan of the furnace provides 18V DC power. Can not find the appropriate voltage of the fan, the computer's 12V DC fan, a series of cement resistance, about 20Ω/5~10W, connected to the original wiring. There is no fixed support for the computer fan, and the wind tunnel can be locked by the self-made pressure plate. I used this method to solve the problem of several stove fans, and have not been repaired yet.
There is 300V voltage on the main board of the United States induction cooker, there is no 18v and 5v, check the auxiliary power supply, it should be the auxiliary power problem. The auxiliary power supply is 18v and 5v18v of which supplies power to the fan. 5v supplies power to the CPU and keypad. We can't check the rest until we get the auxiliary power back on.
If the induction cooker is normal, the low-voltage power supply is normal and the fan is provided by the 24V step-down of the host. Common faults electrical high-frequency vibration stop, boiler component failure, overload protection warning sound.
Measure the low voltage power supply circuit C92 to ground 18V voltage, normal. Measure C91 to ground 5V voltage, normal. Measure the 0 voltage to ground at the output end of pin 1 of the comparator (U2B) (normally 9V), and measure the 4V to ground at the input end of pin 7 of the U2BLow voltage (normal 6V). U2B has flipped from high level to low level.
Send you two induction furnace circuit diagram, such as the first is 18v power circuit, the second is fan interface circuit, most induction furnace circuit principle is similar. For your reference.
1, check whether the peripheral components have short circuit or damage. Disconnect the load circuit and test it again, if it is not normalA What model should I replace it with? '> Induction cooker assembly block H|GHWAY13A with what type instead?
H30R1353 current is 30A, voltage is 1353V can fully meet the requirements of household induction cooker, can replace K1400. The model is "VIPer12A, current 12A, it is a switching power supply chip, which is used more on the induction cooker." Taobao search "VIPer12A", very many. The mip2h2 power management integration can be replaced with the following two models of integration block: MIP2K2 power 5W.
To the final episodeIf Qi brings the model, it may be because of the re-exchange of his model, although if you are waiting for you, I must bring it, and if you change it, you must deal with it well.