In the process of vertical injection molding machine
circuit malfunction, how can we repair?
What kind of maintenance methods are there?
The following origin to introduce for you.
Method one: the first thing we have to do is easy, after first use tools: circuit tester, soldering iron, marker: maintenance to improve the effect of the test, before on injection molding machine circuit board function test online, do some technical processing to be board, to try to weaken the negative effects of various interference on the test process.
Concrete measures are: 1, using functional testing device, the device in the process of comparing online test or all tests pass,
Or more normal)
Device, please confirm test results directly, in order to record;
The test failed,
Or more super poor)
Test, but again, if still failed, also can make sure the test result, test so had been down until the device test on the board (
Finished, and then come back to deal with those who did not pass the test,
Or more super poor)
2, the preparation before the test, the crystal oscillation circuit, welding for large electrolytic capacitors under a foot to make it open, because the capacitor charge and discharge can also bring interference.
Method 2: look after and use tools, general is to use a multimeter and a magnifying glass when holding a piece of injection molding machine to repair the circuit board, good habits is first response to the need for the injection molding machine of circuit board repair visual analysis, when necessary and with the aid of a magnifying glass, so what we want is to look at?
1, injection molding machine, circuit boards, PCB line whether there is a fracture, adhesion, etc. ;
2, whether someone is machine repaired?
What are the components move?
Whether there is a virtual welding, welding, the operational aspects such as 3, if there is a break;
4, discrete components such as resistors, electrolytic capacitor, inductor, diode, triode, etc when disconnection phenomenon;
After confirmed by repairing the parts without the condition, first injection molding machine is measured with a multimeter circuit board between power supply and ground resistance, if the value is too small, only several or a dozen ohms, there are components on printed circuit boards that injection molding machine was breakdown or part of a breakdown, breakdown of components must be taken to be find out.
The concrete measures to be repair circuit board power supply, with the hand to touch the temperature of the injection molding machine circuit boards each device, hot will be the key suspect.
Method 3: first, the use of tools: after circuit tester maintenance: in the condition of permitting, the best is to find a and the maintenance board as good board as a reference, and then use the twin rod VI curve scanning function of good and bad two boards for contrast test, the starting point of contrast can begin from the port, and then, its excellent contrast test, especially for capacitance can make up for the drawback of the multimeter online if it is difficult to measure the leakage.
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