SMD cap concern

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • wrx884
    Senior Member
    • Apr 2015
    • 67
    • Australia

    #1

    SMD cap concern

    I have a super Nintendo that I have opened up to inspect its caps and to see if there's any common trace damage cause by these.

    Upon opening this console, C59 and C60 are the common caps to leak and damage traces underneath. Not sure if the photos show well enough but the C59 caps top is actually inverted as if something or somone has pushed on the top of it quiet hard (no signs of this tho). Is this another way of finding faulty caps? I haven't seen this as such before so thought id ask.



    C59 is a bipolar smd cap 10uF 25V

    C60 is just the normal smd cap 10Uf 50V


    Edit just realised this maybe in the wrong section can mods move to the appropriate section please cheers
    Last edited by wrx884; 11-13-2015, 10:05 PM. Reason: wrong section
  • japlytic
    Badcaps Legend
    • Oct 2005
    • 2086
    • Australia

    #2
    Re: SMD cap concern

    These SMD units are a bit hard to measure, so I simply recommend replaacing them all (there are not all that many on the board).

    I've also read that a number of the early SMD aluminium electrolytic capacitors can be problematic; the Sega Game Gear is known to have bad SMD aluminium electrolytic capacitors in the audio section.
    My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.

    Comment

    • wrx884
      Senior Member
      • Apr 2015
      • 67
      • Australia

      #3
      Re: SMD cap concern

      Originally posted by japlytic
      These SMD units are a bit hard to measure, so I simply recommend replaacing them all (there are not all that many on the board).

      I've also read that a number of the early SMD aluminium electrolytic capacitors can be problematic; the Sega Game Gear is known to have bad SMD aluminium electrolytic capacitors in the audio section.
      I will probably do that anyways but still would like to know if the visual inspection is showing a bad cap or not? since its not showing any leaking what so ever. I can easily remove it since no legs are broken yet and use the ESR meter on it.

      your right these caps from around this era is prone to leaking on a number of consoles which is why I check them

      Comment

      • stj
        Great Sage 齊天大聖
        • Dec 2009
        • 30965
        • Albion

        #4
        Re: SMD cap concern

        Originally posted by japlytic
        the Sega Game Gear is known to have bad SMD aluminium electrolytic capacitors in the audio section.
        as someone who has rebuilt over a dozen, i'll correct you on that, the audio section is about the only part that doesnt leak!
        you have to replace every damned electrolytic in them!

        the fact that it contains an invertor and a CFL tube doesnt help!

        Comment

        • wrx884
          Senior Member
          • Apr 2015
          • 67
          • Australia

          #5
          Re: SMD cap concern

          well ive removed C59 and C60 and tested them with the ESR meter, don't know if results will differ being one is a bi polar cap or not?

          C59 11.79uF, 2.9ohms, 1.4% Vloss
          C60 10.49 uF, 1.9Ohms, 0.8% Vloss

          Mayb a bit off topic stj but I must disagree slightly ive seen a lot of the Audio PCBs on the game gears need recapping just not as much as the main board but the same issues pop up on them.

          Comment

          Related Topics

          Collapse

          • bulkchart32
            i think i accidently ordered non-polarized 10uf caps for my original xbox. will this cause a problem?
            by bulkchart32
            i ordered a lot of caps from digikey to repair my xboxs. one thing i ordered was 50NXA10MEFC5X11-ND caps and i think they are not polarized. will this cause any kind of a problem? i really don't want to order new caps just because of this.
            06-16-2025, 03:09 AM
          • eryjus
            Heathkit IO-4205 Power Supply Caps
            by eryjus
            Hello,

            First, I am a complete noob with high voltage stuff. I'm learning, but I need help by someone looking over my shoulder.

            I recently came into posession of a Heathkit IO-4205 5MHz Dual Trace Oscilloscope. The documentation is copyright 1978. I'm told it works.

            I opened it up to check the caps before I applied power, and found the following black caps and wanted to know what they were. They are on the power supply board. I was able to read the name and model and came up with, "Nytronics 162J-1, 0.1uF, 20% tolerance, 2000VDC."
            ...
            05-10-2023, 11:21 AM
          • Paxman_Swede
            Identifying caps on an old Zoom 9000
            by Paxman_Swede
            Hello!

            I have two projects on my work bench. One is a friends dead JBL Xtreme speaker with a blown voltage regulator and corresponding bulged and shorted cap. That cap has clear markings so I know what replacement I need for it.

            The other project however is a whole different deal. It's a Zoom 9000 guitar effect from the 90th that has developed a devil hound howl when there is no input from the guitar. I'm guessing caps problem. So, since I don't really use this effect anymore I thought it would be a perfect project to learn on.

            I have studied the board and...
            01-14-2025, 09:51 AM
          • mitsu2k
            Is it common for these caps to go bad?
            by mitsu2k
            Just wondering how common it is for these types of caps to go bad. I have a couple that are measuring approximately correct (997nF) however a couple of them show signs that they have been pretty warm at some point. I'm replacing them anyway but just wanted to know how common it is for these to maybe act up when hot....
            01-11-2023, 10:39 AM
          • captain150
            Help with switching power supply caps
            by captain150
            I'm trying to repair two old VCRs, they both have bad caps. One has leaky ones, the other would barely run until I subbed in some caps from another power supply I had laying around (though they are the wrong values). This vcr works for an hour or two, but then the power supply starts whining and the picture gets lines in it. I didn't replace all the secondary caps, so another voltage might still be problematic, or the values I used are too far off.
            I've been on mouser and digikey but the options are a bit overwhelming. I just need some new ones that will work. They don't need to be top quality,...
            03-16-2025, 07:34 PM
          • Loading...
          • No more items.
          Working...