Nine major methods for medium frequency induction melting furnace
(effective for one electric two-furnace medium frequency induction melting furnace )
1 , first static, then dynamic
The so-called static inspection is an inspection performed before the electric induction furnace of an electric two-furnace is not energized. When the static check is confirmed to be correct, the power can be energized for dynamic inspection. If abnormal conditions such as smoke or flicker are found, you should turn off the machine quickly and perform a static check again. This can avoid powering an electric two-furnace intermediate frequency induction melting furnace when the situation is unknown , causing undue damage.
As far as the measurement instruments used in the current maintenance are concerned, only functional online testing and static characteristic analysis can be performed on the components on the circuit board. If the faulty circuit board is finally completely repaired, it must be installed back to the original circuit for inspection. Only then. In order to obtain the correct result of this inspection process, to judge whether the circuit board with the replacement of the electrical and electronic components is repaired, it is best to check whether the auxiliary power supply of the electric induction furnace of one electric two furnace is correctly supplied to the relevant circuit board as required. The upper and the interface plug-ins on the board are plugged in reliably. And to eliminate the impact of circuit board peripheral circuit failure, in order to correctly guide the maintenance work.
2 , clean first, then repair
For an electric two-furnace medium frequency induction melting furnace with heavy pollution , first clean the panel buttons, terminals and contact points, and check whether the external control keys are malfunctioning. Examining a medium frequency induction furnace two electric melting furnace interior, it should focus on a two internal electrical frequency induction furnace melting furnace is clean, if the components found, two leads within an electrical furnace frequency induction melting furnace, the dust has to go between the lines, Contaminants, spider webs or excess solder, soldering oil, etc. should be removed first and then repaired, which can reduce natural faults and achieve twice the result with half the effort. Practice has shown that many faults are caused by dirt, dust, and foreign matter. Once cleaned or cleared, the fault will automatically disappear.
3 , the first power circuit, the rear function circuit
The power supply is the heart of an electric two-furnace intermediate frequency induction melting furnace . If the power supply is not normal, it is impossible to ensure the normal operation of other parts, and there is no way to check other faults. According to experience, the failure rate of the power supply part accounts for the highest proportion in the whole machine. Many faults are often caused by the power supply. Therefore, the maintenance of the power supply circuit can often get twice the result with half the effort, and the maintenance of one electric two-furnace intermediate frequency induction melting furnace . The main circuit power supply part, the control power supply part, the control circuit and the trigger circuit part should be repaired first, and finally the order of the display part. This is because the power source is the source of energy for the normal operation of each part of the medium-frequency induction melting furnace , and the control circuit is the basis for normal operation.
4 , first universal, after special
In the absence of a clear understanding of the electric melting furnace frequency induction furnace failure of two parts, a number of adjustable components not within a medium frequency induction melting furnace two electric furnace blind adjustment, in order to avoid artificially complex of the fault. When the protection circuit components such as fuses or current limiting resistors in the machine are hit or burned, it is necessary to carefully check whether there are any problems with the surrounding circuits. After confirming that there is no problem, replace them and restore the power supply. Failure due to component quality or external factors caused, usually accounts for 50% of the common faults of a power failure two special furnace medium frequency induction melting furnaces are mostly soft fault, rely on the experience and instruments to measure and repairs. According to the common characteristics of an electric two-furnace medium frequency induction melting furnace , common faults with universality and regularity are eliminated, and then special circuits (including some special components) are inspected. In order to gradually reduce the scope of the fault, from face to point, to achieve the effect of shortening the repair time.
5 , first peripheral, then replace
After determining the damaged components, do not rush to replace them. After confirming that the peripheral circuits are normal, consider replacing the damaged electrical components. When inspecting an integrated circuit, when the voltage of each pin of the integrated circuit is abnormal, do not rush to replace the integrated circuit. Instead, check the peripheral circuit first, and then consider replacing the integrated circuit after confirming that the peripheral circuit is normal. If you do not check the peripheral circuit, blindly replacing the integrated circuit can only cause unnecessary losses, and now there are many pins on the integrated circuit, which will be damaged if you pay little attention. It can be seen from the maintenance practice that the failure rate of the peripheral circuits of the integrated circuit is much higher than that of the integrated circuit.
6 , first troubleshoot, then debug
In the overhaul, circuit faults should be eliminated before debugging. Because debugging must be done under the premise of normal circuit. Of course, some faults are caused by improper debugging. At this time, it is only necessary to directly debug and return to normal.Be sure to pay attention to the quality of the solder when replacing components, and do not cause solder joints. In addition, the welding time should not be too long, so as not to damage the components and cause unnecessary economic losses. Multiple welding of electrical and electronic components can easily cause the copper foil to fall off the board. After replacing the components, a foreign body within two electric furnace medium frequency induction melting furnace to promptly clean up, wiring and connectors to re-check it again, and in place, so as to avoid further human error.
7 , first DC, then exchange
During the inspection, the inspection of the electronic circuit must first detect the static working point of the DC circuit and then detect the dynamic working point of the AC circuit. DC and AC here refer to the DC and AC circuits of the electronic circuit. These two circuits are complementary, and the AC circuit can work normally only if the DC link is normal.
9 , first no power measurement, after power test
Firstly , statically check one electric two-furnace intermediate frequency induction melting furnace without electric current . If it is normal, then dynamically check one electric two-furnace intermediate frequency induction melting furnace under power supply . If the power is turned on immediately, it may artificially expand the fault range, burn more components, and cause undue losses. Therefore, before the power failure of the fault -electric two-furnace medium-frequency induction melting furnace , static inspection must be carried out, and the power can be detected under static normal conditions.
9 , first shared circuit, rear unit circuit
The common circuit of the one-frequency two-furnace intermediate frequency induction melting furnace fails, and the energy and information cannot be transmitted, so that the performance of each unit circuit is degraded and the function is lost. If the power supply of a one-electric two-furnace intermediate frequency induction melting furnace fails, the entire system cannot operate normally, and the energy and information transmitted to various unit circuits cannot be realized. Thus, to be followed in order to access a common circuit, the unit circuit, - fast, accurate troubleshooting has a two-frequency induction furnace melting furnace.
The failure of an electric two-furnace intermediate frequency induction melting furnace is manifested as diversity. Any one faulty electric two-furnace intermediate frequency induction melting furnace is overhauled, and the fault phenomenon, cause, overhaul, skill, and experience should be recorded in a special notebook. In order to accumulate maintenance experience, and to increase their own experience L to the theory under the guidance of the theory, to achieve specific failure analysis, in order to accurately and quickly eliminate the fault. Only in this way can we cultivate ourselves as an expert in repairing the failure of a medium-frequency induction melting furnace .