How to identify proper replacements

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • pnutbutters
    Member
    • Jun 2012
    • 17
    • usa

    #1

    How to identify proper replacements

    I have a motherboard with what I assume are bad ceramic caps (the little square guys).. I will have to take them out of circuit to be sure, but I do not know how to tell what to replace them with.

    There is nothing written on the cap like the regular capacitors so do I just go by size?

    I have a hotair rework / soldering station.. but any tips to removing the little guys and re-soldering one back onto the board???

    Really appreciate any help here!

    Thanks!!
  • retiredcaps
    Badcaps Legend
    • Apr 2010
    • 9271

    #2
    Re: How to identify proper replacements

    Originally posted by pnutbutters
    There is nothing written on the cap like the regular capacitors so do I just go by size?
    One member (momaka) goes by size ...

    https://www.badcaps.net/forum/showthread.php?t=19278
    --- begin sig file ---

    If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

    We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

    Please do not post inline and offsite as they slow down the loading of pages.

    --- end sig file ---

    Comment

    Related Topics

    Collapse

    • Srdjan01
      Oral-B IO Series 6
      by Srdjan01
      Hi everybody.
      I'm trying to fix this toothbrush that doesn't wanna start. And I need your help.

      Just to inform you that I'm supperbeginner

      First photos are from internet because I did not took a photo of whole board.

      I have noticed that fuse marked with "E" near the battery pole is bad and decided to short it with a "proper calibrated wire" as one would say.
      Now, when I apply 1V from the power supply, limited to 500mA, one of the component stick out from the rosin mist. CHC N2AB (or some variation of that letters) is the hottest...
      03-05-2025, 10:05 AM
    • silver60618
      Lenovo Legion 7 - Help Identify IC
      by silver60618
      Hi gang, its a long shot, but working on Lenovo Legion Pro 7 motherboard NM-F091, and trying to identify this component near GPU with marking "eHFQH" that is burned and shorting the board. Looks like power management IC

      I couldnt find any schematic or boardview. The CPU side also has same chip. Any way to identify this chip? or take measurements from the good chip to determine what it is?

      Any help would be appreciated...
      07-02-2025, 12:16 PM
    • chth96
      How can I identify varistor which have been blew up?
      by chth96
      I mistakely pluged 100v japanese retro game console to 220v outlet.
      So It seems that glass fuse and varistor have been blew up.
      I can identify that voltage and ampere value of glass fuse(250V LF 1.6A),but It is impossible to identify varistor type in my sega saturn PSU(YAMAHA 35M07U XR258)
      Is there any way to identify varistor type in my sega saturn PSU?
      Any reply would be appreciated.


      EDIT:
      It seems that I finally found out what type this black varistor is. It is Panasonic ERZV05D221 “ZNR” Transient/Surge Absorbers (Type D) Varistor Voltage...
      11-26-2023, 08:52 AM
    • baiceanu_stefan
      nm-f251 Schematic, boardview or help identify componente
      by baiceanu_stefan
      Hello, I have a legion pro 5 16arx8 serial number pf4bf4aw mb code nm-f251 rev1.0 which was dissasembled by the client for cleaning. Now it does start but for 20 secs after that fans run at maximum and then shut down. Found PU8302 burned but cannot identify it the part. It is written eHFAA on it but didn't found any info, no boardview, nothing. Can anyone help identify the part so I can order it from somwhere? Ataching some pictures of the motherboard, serial number and part. Than\k you...
      04-24-2024, 12:49 AM
    • slybunda
      Gemcon capacitor replacements?
      by slybunda
      taken from my thread about car alarm siren here: https://www.badcaps.net/forum/troubl...rm-siren-issue

      there are 2 caps which im looking to get replacements for.
      Branded as Gemcon
      single 100uf 16v 6.5mm x 11.5mm
      single 100uf 50v 8mm x 11.5mm
      lead spacing is around 3mm

      there is space for 16mm tall caps

      rs components is good place for me to go since its close by, what replacements do you suggest and do these need to be low esr?
      the caps have...
      02-05-2024, 03:36 PM
    • Loading...
    • No more items.
    Working...