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need help reading resistor values

Discussion in 'Troubleshooting and Repair' started by wikusm, Sep 9, 2010.

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  1. wikusm

    wikusm

    2
    0
    Sep 9, 2010
    Hi there, I am trying to repair a UPS i got from someone, problem is I cannot seem to calculate the value of these resistors using the colour codes? maybe im doing something wrong!

    [​IMG]
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,448
    2,809
    Jan 21, 2010
    yellow, white, white, orange, brown?

    499K 1%

    [​IMG]
     
  3. Resqueline

    Resqueline

    2,848
    2
    Jul 31, 2009
    If the colors are yellow, white, white, red, brown; it reads as 499 + 2 zeroes, 1%. (=49900 ohms.)
     
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,448
    2,809
    Jan 21, 2010
    well, I was wondering if the last stripe was red or brown, and clearly Resqueline and I disagree on another band.

    It's not clear on the image, but I imagine it will be clearer in real life :)
     
  5. wikusm

    wikusm

    2
    0
    Sep 9, 2010
    i believe its yellow white white red brown yes, thanks a lot! and thank you for the picture, will keep it for future reference :)
     
  6. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    Sometimes the bands will make sense if read either way. The tolerance band is normally spaced a little further apart from the other bands.

    In your image you can see it more clearly on some resistors than others.
     
  7. Resqueline

    Resqueline

    2,848
    2
    Jul 31, 2009
    R49 does seem to be what steve was reading, and R110 was what I was referring to. Good lighting and a magnifying glass are good tools to make sure one gets it right.
    Under poor lighting brown can be mixed with red, and red can be mixed with orange. Green & blue are also at risk of being mixed up, and sometimes violet & blue/grey.
    The tolerance band sometimes also seems to be a tad wider than the rest.
     
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