OPTO COUPLER TESTING
Optocoupler is one type of ICs , It isolates input and output section by using optical technology this feature increase safety of circuit. Optocoupler has many part number , different part number has different output type so before checking it has to use part number to research with datasheet and find input type and output type. How to check Optocoupler it depends on device type inside the ICs. There are many package of Optocoupler , briefly , through hole and SMD. For through hole type such as DIP-6 which has 6 pin DIP-4 which has 4 pin etc.
Optocoupler MCT2E DIP-6 Package
I will use MCT2E for example testing. After researching with datasheet we know input is LED
terminal number . 1 is Anode and terminal number 2 is cathode , this case , we will check it by using the same method as LED checking. The dot on ICs body mean that the first pin start from that. The output is a transistor pin number 6 is Base terminal , pin number 5 is Collector terminal and pin number 4 is Emitter terminal , so checking method it has the same method as transistor checking.
Step to test Optocoupler.
1. Input Checking.
