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Help needed. Quadra 950 tantalum capacitor identification needed.

Discussion in 'Troubleshooting and Repair' started by Alex Santos, Jan 11, 2018.

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  1. Alex Santos

    Alex Santos

    Jul 6, 2017
    Dear members.

    My Macintosh Quadra 950 was misbehaving so I took it apart and did a close visual inspection of the logic board and found C26, originally a tantalum, clearly failed. It literally fell apart as I cleaned up the area. The damage was isolated to the capacitor and C26 appears to be the same as C23.

    I found a picture of the logic board and am confident that the part I need is also placed on the board in a few other places so I am leaving images for some help. As an FYI, I contacted mouser and they were unable to help me. I would be extremely grateful if someone could help identify this part and my experience finding parts is truly at the neophyte level when finding parts. So I would be deeply grateful if someone could post a link to a part.

    Info I can provide to help.
    C26 is the tantalum cap that failed catastrophically.

    C23 appears to be physically the same as C26 so I am assuming the equivalent of C23 can be soldered to C26.
    Screen Shot 2018-01-09 at 9.37.18 AM copy.jpg

    Next to C26 is a voltage regulator (Image of same attached)
    Screen Shot 2018-01-11 at 11.49.34 PM.jpg

    C23 has a 2 on the left. Centered appears to have a 10 and 16V

    Screen Shot 2018-01-09 at 2.34.46 PM.jpg

    Is C26 a 10uF, 16V cap, this is what someone who knows more than me claims.

    If someone could provide a link to a high quality replacement I would be really grateful.
    Should I replace the voltage regulator as well?

    Kind regards
    —Alex Santos
  2. davenn

    davenn Moderator

    Sep 5, 2009

    yes it is

    go to mouser, Farnell as 2 examples

    if there is +5V coming out of it .... no

    Alex Santos likes this.
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