Can't recognized caps

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  • Thermaltake
    Brain badcap
    • Aug 2015
    • 332
    • D12
    #1

    Can't recognized caps

    Hi, can someone help me I have determine voltage on this cap on picture below. I have donor board and I would like to replace caps but I am not sure if they are same voltage. I see that they are both 270 ohm, but on this other one there is no voltage I google that C letter is for 16V mark, but I would like someone to confirm if thats true. And Would it be wise if we determine they are 16V to replace them all ? btw I know that one cap is missing and I noticed that on one board those 270 ohm caps are a bit shorter.
    Attached Files
    Last edited by Thermaltake; 03-29-2022, 11:02 AM.
    Tags: None
    • gt403cyl
      Member
      • Jan 2017
      • 35
      • Canada
      #2
      Re: Can't recognized caps

      The cap has a rating of 270uF (not ohms, that is resistors).
      As for voltage ratings, depends what part of the circuit it is located...
      The pic on the left, shows a 6.3v cap on the left of the heat spreader and a 2.5v cap on the right of it.

      I would think a 6.3v cap would be fine.
      However having the correct cap for a replacement would be ideal.
      Also voltage ratings on caps are generally the MAX voltage the cap is rated for, so using a 16v cap on a 6.3v circuit should be fine.

        Comment

        • Thermaltake
          Brain badcap
          • Aug 2015
          • 332
          • D12
          #3
          Re: Can't recognized caps

          Sorry I wrote wrong I ment uF not ohms don't know what I was thinking...

          Ones on the left would replace those to the right. I forgot to say that left is donor board, and on the right is board I would like to repair.

          6.3V are caps beside that one I would take off, but not that I pointed red on the picture.

            Comment

            • piernov
              Super Moderator
              • Jan 2016
              • 4435
              • France
              #4
              Re: Can't recognized caps

              Originally posted by gt403cyl
              I would think a 6.3v cap would be fine.

              This is input decoupling of the CPU VCore VRM so this will obviously be rated at 16V at least. Put a 6.3V and you'll get some nice fireworks…
              Last edited by piernov; 03-30-2022, 10:14 AM.
              OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

                Comment

                • Thermaltake
                  Brain badcap
                  • Aug 2015
                  • 332
                  • D12
                  #5
                  Re: Can't recognized caps

                  Originally posted by piernov
                  This is input decoupling of the CPU VCore VRM so this will obviously be rated at 16V at least. Put a 6.3V and you'll get some nice fireworks…
                  I know when people are talking rubbish don't worry

                  I found board schematics for donor board and those caps are 16V, I guess that would be okay to replace all on that board I want to revive, right ?
                  Attached Files
                  Last edited by Thermaltake; 03-30-2022, 11:16 AM.

                    Comment

                    • gt403cyl
                      Member
                      • Jan 2017
                      • 35
                      • Canada
                      #6
                      Re: Can't recognized caps

                      Originally posted by piernov
                      This is input decoupling of the CPU VCore VRM so this will obviously be rated at 16V at least. Put a 6.3V and you'll get some nice fireworks…
                      Originally posted by Thermaltake
                      I know when people are talking rubbish don't worry

                      Can you tell me if it's not a problem if those are 16V I found in manual of nippon caps that C is for 16V, but I'm not sure I need someone who is in electronics to confirm.
                      I was under the impression it was the other way around, obviously putting a 6.3v rated cap in a 16v circuit is bad.

                      If you would read my response you would see that. I even state that.

                        Comment

                        • lotas
                          Badcaps Legend
                          • Jan 2016
                          • 4554
                          • Russia
                          #7
                          Re: Can't recognized caps

                          nichicon LF series
                          C = 16v
                          Attached Files

                            Comment

                            • Thermaltake
                              Brain badcap
                              • Aug 2015
                              • 332
                              • D12
                              #8
                              Re: Can't recognized caps

                              Originally posted by lotas
                              nichicon LF series
                              C = 16v
                              Thanks. So it's safe to replace all three caps, right ?

                                Comment

                                • lotas
                                  Badcaps Legend
                                  • Jan 2016
                                  • 4554
                                  • Russia
                                  #9
                                  Re: Can't recognized caps

                                  Yes, replace all three, just observe the polarity of the capacitor on the board (ASUS has a non-standard polarity - with a white stripe it is positive).

                                    Comment

                                    • Thermaltake
                                      Brain badcap
                                      • Aug 2015
                                      • 332
                                      • D12
                                      #10
                                      Re: Can't recognized caps

                                      Originally posted by lotas
                                      Yes, replace all three, just observe the polarity of the capacitor on the board (ASUS has a non-standard polarity - with a white stripe it is positive).
                                      Thanks!

                                      For all info. As I see they both have negative polarity on the same side Asrock and Asus. White is negative.
                                      Last edited by Thermaltake; 03-30-2022, 10:58 PM.

                                        Comment

                                        • Thermaltake
                                          Brain badcap
                                          • Aug 2015
                                          • 332
                                          • D12
                                          #11
                                          Re: Can't recognized caps

                                          Caps soldered from donor board to one that I want to revive, everything is working fine

                                            Comment

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