Don't Miss

Electronic Board That Does Not Have Components’ Label

By on August 4, 2009

electronic board

If you are repairing consumer electronics generally you will find that most of the board have label besides each components. For example, a resistor would be labeled as “R”, Transistor as “Q”, Capacitor as “C” and so on. With the label/location it would be easier for us as electronic repairer to identify the type of components on the board.  A transistor consist of 3 legs and  a dual Schottky diodes also have 3 legs. If with board location we will easily know that the “Q” is for transistor and “D” is for diode or Schottky diode. However in certain board design there is no marking beside the components as seen from the above photo.

To some experience technicians, they would easily know the components is belong to which type by looking at the physical appearance and the part number. To beginners or to those who is just starting out, they will have a hard time to differentiate the components unless they have someone to refer to or doing their own research by comparing the components photo. By looking at the photo to do you know what component is that?



  1. John Preher

    August 5, 2009 at 12:46 am

    Looks like a crystal oscillator...

  2. Jorge Delgado

    August 5, 2009 at 12:14 pm

    Hi jestine, to me it looks like a Crystal capacitor, I will like to know if I'm right. dont have a lot of experience but I have the heart. Thanks for your info and your webside it has help me to get better, a i know when i got the money and buy me an oscilloscope i will get much better.

  3. beh

    August 6, 2009 at 11:47 am

    Hollo jestine
    i agree this is crystal oscillator with three pin..driving the big near ic

  4. admin

    August 6, 2009 at 8:54 pm

    Hi Guys,

    Yes it is a small crystal Oscillator.


  5. Dave White

    August 8, 2009 at 12:40 am

    I have come across a componet that looks so much like that in that photo, and found out that it was just a fuse.

  6. circuit world

    August 8, 2009 at 6:41 am

    considering there's some type of demodulator chip/syncro/PLL, and trimmer cap near by, maybe its some kind of crystal oscillator' to be used as a source, for oscillating reference? 'ie, clock signal(s)''

  7. admin

    August 8, 2009 at 12:19 pm

    Hi Dave,

    Thanks for sharing! Sometimes without the marking the manufacturers only made us guessing unless one really have the experience of reading a circuit. It will be a pain to beginners!


  8. admin

    August 8, 2009 at 12:25 pm

    Hi Circuit World,

    Yes you are right!


  9. rhay

    August 13, 2009 at 1:34 pm

    hi justine
    i just want to know where can i buy your books here in the philippines

  10. admin

    August 13, 2009 at 8:27 pm

    HI Rhay,

    I have sent the information to your email.


  11. electrical upgrades

    August 19, 2009 at 2:03 am

    This is the 1st time I came across your blog. It is too much full of valuable information. I would to visit again and again. Thanks, just keep going.

  12. admin

    August 19, 2009 at 7:22 pm


    Thanks for dropping by!


  13. Wayne russell

    January 23, 2011 at 3:30 pm

    Jestine Hi
    I hope you can help me ive allways wanted to get into electronics but
    but ive never done any board repair .Ihave this gpx kcld887dt under the counter cd dvd player I need to replace this board which runs the laser opens closes the drive for cd .Is there a website that i can go to to get this done or get it repaird.The books you are selling are these hard cover and which book should i go with first when i start out thi new skill .Thank you

  14. admin

    January 24, 2011 at 9:48 am

    HI Wayne,

    I'm selling only the ebook and do not have hard copy book. About your problem i suggest that you visit this website

    and email him.



Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.