check resistors and capacitors

Discussion in 'General Electronics Chat' started by raffazila, Dec 17, 2006.

  1. raffazila

    raffazila Thread Starter New Member

    Joined:
    Dec 17, 2006
    Messages:
    4
    can any one explain me how to check resistors and capasitors by digital meter.
  2. thingmaker3

    thingmaker3 Retired Moderator

    Joined:
    May 16, 2005
    Messages:
    5,072
    Location:
    Rural, Oregon GMT -8
    Resistors are easy. Set meter to read resistance. Place one each meter lead on one each resistor lead. Adjust scale.

    To check a capacitor for short, set meter on highest resistance scale. Place one each meter lead on one each capacitor lead. Meter reading should increase to "overscale" if the capacitor is not short. (I prefer old-fashion analog meters for this check.)

    To check the value of a capacitor, one will need either an external device or a very expensive digital meter.
  3. raffazila

    raffazila Thread Starter New Member

    Joined:
    Dec 17, 2006
    Messages:
    4
    I am a newbie so please be patient to help me.thank you.
    I want to test a resistor's resistance fixed on a mobile phone.
    To check resistance should i remove it from the phone or can i check it onboard with power on or off.Can you guide me with pic?.
    Please explain me.
  4. beenthere

    beenthere Retired Moderator

    Joined:
    Apr 20, 2004
    Messages:
    15,815
    Location:
    Missouri, USA (GMT -6)
    Hi,

    It's often impossible to check a component in circuit. With surface-mount, it's also hard to know what the value of the device is as well.

    Unless you have the equipment and expertise to remove suspect components from your cell phone, you're more likely to do harm than find a problem. Unless the device is obviously burned or discolored, it's probably ok. Voltages and currents in cell phones are pretty small. The failure is more likely to be in a semiconductor or ic, or in a bad connection/connector.
  5. raffazila

    raffazila Thread Starter New Member

    Joined:
    Dec 17, 2006
    Messages:
    4
    thanks a lot for your help
  6. raffazila

    raffazila Thread Starter New Member

    Joined:
    Dec 17, 2006
    Messages:
    4
    beenthere can you tell me a ebook for learning about electornic servicing
  7. Bill_Marsden

    Bill_Marsden Moderator Staff Member

    Joined:
    Mar 24, 2008
    Messages:
    19,320
    Location:
    Dallas, TX (GMT-5 w/ DST)
    Just curious, have you read the eBook here? It covers a lot of ground, and will give you a good start.
Similar Threads
Forum Title Date
General Electronics Chat Please check my work Dec 11, 2014
General Electronics Chat 3 phase check Dec 6, 2014
General Electronics Chat please check my answer (processor ) ? Nov 16, 2014
General Electronics Chat How to check if a dc motor is working Nov 7, 2014
General Electronics Chat How to check transformer? Oct 22, 2014

Share This Page