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Trying to fix an electronic card ( speed variator)

Discussion in 'Troubleshooting and Repair' started by Elecbegginner, Mar 24, 2013.

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  1. Elecbegginner

    Elecbegginner

    103
    0
    Mar 24, 2013
    Hello everyone am new to the forum and seriously i need help on some cards .

    So i have a card to fix , after looking at it i found out that the transformer output pins are covered with carbon , clearly its burned , i checked the condasator and its out of service .
    Now how to repair the transformer ?, its a 230v to 9v/120v , and the wire is too thin to recoil easily .
    In the other hand i got to check some ICs , 1 oscillator , 2 optocouplers , how to test them out of circuit and how to power them in orther to check if the the internal circuit is working ?
    Here the datashets of the the two ICs
    The oscillator PIC16F627A:
    [​IMG]
    tlp3042 optocoupler :
    [​IMG]


    Thanks in advance .
     
  2. Elecbegginner

    Elecbegginner

    103
    0
    Mar 24, 2013
    Any ideas on how totest the optocoupler ,ithas a LED and TRIAC inside .how to test them please,and BTW the TRIAC recieves the signal by infrared .
     
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