Explanation of chip processing manufacturer__ What is ICT? What is the main test? Advantages and disadvantages of ICT testing?

ICT Test in SMT Chip processing plants are very common , But most people don't understand the usefulness of this test , Next, Jiangxi yingteli patch processing factory will introduce to you ICT What is the test .

ICT What is it? ？

ICT It's English (In-Circuit-Test）, Automatic online testing , But the industry should be more accurately called circuit testing .

ICT It is mainly used for circuit board (PCBA) Electrical test of , Think of it as an advanced multimeter , It can detect the electrical properties of all parts on the circuit board and whether the welding is open through the needle point without removing the electronic parts from the circuit board / Short circuit problem .

ICT Principle of test

ICT The testing principle is to use the needle bed to connect the test points arranged on the circuit board to achieve the testing purpose ,ICT Only when the pin point is placed at the test point extending from the contact foot of all parts can it be measured , Measure the resistance 、 Capacitance and voltage .

ICT What does the test mainly test ？

1. A short circuit , Wrong parts 、 Missing parts 、 Set up a monument 、 Bridge 、 Inverse polarity ;

2. Measure the resistance 、 capacitance 、 inductance 、 diode 、 Zener diode 、 Relay 、IC、 Connectors and other parts .

3. Electrical function test .

4. Test the function of the active parts .

ICT test pcba Advantages of circuit board ：

1. Fast test speed 、 Time is short

PCBA It can be done without power on L/C/R/D Test of , It can effectively reduce the test startup waiting time , It can also reduce the accidental burning of circuit board caused by short circuit

2. Excellent testability

Controlled by a computer program , Greatly reduce miscarriage of justice 、 Risk of missing measurement , Reduce the trouble of production line .

3. The cost of product maintenance is greatly reduced

The operator can be responsible for product maintenance , Effectively reduce labor costs . ICT You can tell the problem of that part through a computer program ,

4. Improve product quality

As long as there are enough test points ,ICT It can measure all the circuits and parts on the circuit board , It can improve product quality

ICT Disadvantages of testing ：

1.ICT The cost of equipment and fixtures is generally more expensive , Especially the pneumatic steel fixture , It is more suitable for mass-produced products .

2. Use ICT Additional test points shall be designed on the circuit board for needle bed connection . The utilization rate of circuit board wiring is reduced .

3. The needle bed needs regular maintenance , The probe also needs to be replaced regularly , To ensure the normal operation of the probe .

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