Capacitor Leakage

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • killian6pk
    Badcaps Veteran
    • Apr 2010
    • 502
    • USA

    #1

    Capacitor Leakage

    Is the following picture of a CB with whiteish stuff under several of the capacitors glue or leakage from the capacitors? I am really interested in the the blue disk capacitors and the large 1000 uF in the center of the board.
    Attached Files
    Have you ever stopped to think and then forget to start thinking again?

    As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."
  • yyonline
    Badcaps Veteran
    • Jul 2009
    • 692
    • USA

    #2
    Re: Capacitor Leakage

    That's definitely glue. Leaked electrolyte is usually brown and crusty. Also, the blue disc-shaped capacitors are not electrolytic, hence, there's nothing to leak out of them.

    Comment

    • seanc
      Badcaps Legend
      • Nov 2008
      • 1319

      #3
      Re: Capacitor Leakage

      Is that out of a Dell monitor, backlights on for 2 seconds then off?

      Most likely fix:
      Replace the 4 2sc5707 near the transformers.
      Resolder all of the legs on all transformers.

      Comment

      • ant3202
        Badcaps Veteran
        • Jun 2006
        • 274
        • Singapore

        #4
        Re: Capacitor Leakage

        replace better capacitor too

        Comment

        Related Topics

        Collapse

        • acedogblast
          Guide to transplant MEC1503 EC chip and EEPROM reprogamming for T14s gen 2 and X13 gen 2
          by acedogblast
          This is a guide that I am writing for helping others to replace their MEC1503 EC chip if it breaks (or to get around an inconvenient prompt to the BIOS). This forum has been extremely helpful to me so I would like to contribute to help others. I will tell you right now that this task is very difficult to do. You MUST have experience and tools to do precision micro-soldering, BGA reballing, trace repair, and general laptop repair skills.

          There are some specialty tools needed to do this task. The replacement MEC1503 chips can be acquired from Aliexpress. Do not buy the bare chips as...
          11-02-2024, 05:13 PM
        • chth96
          If I replace with inferior capacitor, Is it No harm to other IC components at all?
          by chth96
          I replaced some capacitor which is located on optical pickup pcb which is shown in the table below(PCB #2).Because it have been out of order.
          Now,It works very well,But I just have found that all caps (6svpc100my and other part number as well) ,which is shown in the table below, has ultra-high ripple current spec.
          It is not able to obtain any capacitor which can be a substitute for this ultra-high ripple current nichicon capacitor.
          So I replaced it with samxon and rubycon's general capacitor(GP,YXA series).
          I know that these capacitor will not last as long as nichicon capacitor...
          12-22-2023, 04:34 AM
        • chth96
          How can I test non-polarized capacitor?
          by chth96
          I desoldered samwha NF capacitor(50v 5.6uf) from PCB circuit of 29inch CRT TV which have symptoms of no display after I heard sound of inrush of current to TV whenever I switch on this television.
          I measured ESR value of this non-polarized capacitor(samwha NF capacitor 50v 5.6uf) by means of MESR-100 ESR meter and It displayed 0.3 ohm

          And When I measured its capacitance with digital multimeter and LCR-T4 Mega328 meter, It displayed 10uf from DMM and 8uf from LCR-T4 meter.
          I found catalogue of samwha capacitor(samwha-catalogue_3.pdf file), which is attached to this thread,...
          06-02-2024, 07:31 PM
        • dragon3x
          After updating motherboard capacitors, what to do next (Asrock K7VT2, SOLTEK SL-75FRN2L)
          by dragon3x
          Hi, I have some 32 bits computer motherboards that need repair, as they fail to
          power on.

          Here are some examples :

          (N.B. "capacitors" indicated here are electrolytic capacitors located in the onboard
          switching supply area).
          (N.B. #2 : I could not find a 3300 microF aluminum-polymer with a higher voltage
          than 6.3 V.)

          1 - Motherboard #1 : this is an Asrock K7VT2 (socket A) that still works well. To put it on test
          I replaced capacitors with aluminum-polymer.
          3300 microF/6.3 V. x 4 replaced by 3300 microF/6.3 V. (KYOCERA...
          03-21-2025, 02:46 PM
        • chth96
          Is it no harm to replace with capacitor without ripple current rating?
          by chth96
          When I tried to repair LG 29 inch CRT TV, I found that the ESR value of samyoung SMS capacitor(160v 2.2uf), which is very close to D1879 transistor, is 6 ohm.


          Judging from above ESR Meter Table,I think It is necessary to replace this sms capacitor.So I visited local electronics shop,and I purchased 160v 2.2uf rubycon YK capacitor.
          But when I browse through rubycon YK datasheet,I found that there is no ripple current rating for 160v 2.2uf specification. But On the contrary, I found 39 mA ripple current rating for 160v 2.2uf SMS capacitor.
          Rubycon YK DataSheet (b...
          04-19-2024, 05:19 AM
        • Loading...
        • No more items.
        Working...