With the proliferation of electromagnetic furnaces, maintenance techniques and experiences of electromagnetic furnaces are constantly evolving and updated。
(1) when a user gives you the machine, do not be busy as an interviewer, but first ask the user about the failure of the electromagnetic furnace and the cause of the damage, and then test the machine。
(2) the test is conducted without a pan and incandescent lamps attached to 25 w in the electrical circuits of the electromagnetic furnace in order to prevent internal short circuits from blowing up and spreading the malfunction. At this time, observing the brightness of the light bulb indicates that the interior is short if it is very bright and reaches the normal brightness of the 25w light bulb. If the light bulbs are lit and destroyed, it means that the circuits are basically working。
(3) to determine whether the oscillation circuit is working and to observe the working condition of the electromagnetic furnaces effectively with a lighted diode and a beeper attached to the stove. The light of the 2nd tube means that the electromagnetic furnace works normally。
(4) open the hood to detect all circuit resistance, starting with the door control, including whole-stream bridge piles, large power resistance, 4uf, 2. 7 uf, etc., to be measured as far as possible with a pointer-type universal meter, which can be done by removing one end of the element from the sorbent。
(5) common loss-prone components are: high-power, high-retarded electrical resistance circuits or larger, improbable or smaller, and lm339 damage。
(6) the damage to the key is extremely simple, mostly due to the loss of certain functions or functional disorders caused by the dynasty。
(7) most of the power outlets for the users were one of the causes of the malfunctions and, after repair, the users were advised to replace the power outlets as much as possible。
These are simple but practical, and 80 per cent of the electromagnetic furnaces can be repaired without fear if they are mastered。
