The IGBT H20R1202 is out of order
Three large capacitance and high power resistance key check on the board. If there is no problem, then use the multimeter to measure whether the voltage of each 339 foot is normal.
The reason of the breakdown of electromagnetic furnace IGBT H20R1202:1, the electromagnetic stove vice power failure, no 18V, fan no power supply or fan broken, no heat inside the machine;2, 5uF, 0.27uf capacitor loss or weld;3, the internal breakdown of the rectifier bridge;4 、 IGBT tube thermistor open or shorted;5,5V voltage is abnormal; drive tube and big resistance are not good.These factors must be checked thoroughly, the replacement of the original parameters according to the change, do not stay hidden, and then replaced the new H20R1202, you can burn the fuse recovery test machine.
(1) if the bulb is dark red. (applicable to plug 220V standby indicator), open the electromagnetic oven power, the bulb flicked on and off, (and plug in the 220V after the standby indicator does not light), open the electromagnetic oven power, a light bulb that is dark is a dark light power resume shows; the electromagnetic oven has the basic OK.2. if the bulb is bright, it indicates that the IGBT pipe is fully connected. At this point, if the light bulb is removed, the IGBT tube must be burned! It should be the main driver of resonant capacitor voltage rectifier circuit.(3) if the bulb is dark red, open the electromagnetic oven power, lighting brightness unchanged. It should be the main control panel power supply side power circuit of microcomputer.(4) if the bulb is dark red, open the electromagnetic oven power, a light bulb of a secretly flashing, but the pot up light bulb is very bright; to lift the pan fried IGBT, check the CPU disk drive line.
Repair the electromagnetic oven if IGBT tube replacement trick; IGBT also remember to drive tube change together (whether it is good or bad; many people have bad measurement did not change; the price is not too long to burn IGBT; two audions up to 1 yuan; a IGBT to turn over to ten) check the 0.27UF or 0.3UF, 5UF capacitor; everything is ready. 2 in the exchange of 220V, a series of 60-100W lighting, and pan, turning on the power supply:
