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Thread: UEC DSD 4121 digital performance degraded - after a long time :)

  1. #21
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    Got lucky and found some capacitors, just plain old electrolytic caps and a bit of solder and the box is fixed.



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    I pried the old caps off with a jeweller's screwdriver between the case and the black base. A gentle pry gets them up easily and leaves two nice large pads to solder on to.

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    Default Amendment to my advice

    [QUOTE=EKGEKH;791102]I pried the old caps off with a jeweler's screwdriver between the case and the black base. A gentle pry gets them up easily and leaves two nice large pads to solder on to.[/QUO

    I worked on another box today. My advice to gently pry off the caps turned out to be very bad and while working on this box, the cap came off along with one of the pads. Fortunately, it was the negative so I was able to simply solder the new cap negative lead to another ground.
    I removed the rest of the caps by cutting their tops off with side cutters and this worked OK but I have ordered a hot air soldering tool for the next one.

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    [quote=ekgekh;832905]
    Quote Originally Posted by ekgekh View Post
    i pried the old caps off with a jeweler's screwdriver between the case and the black base.
    I just twist them off quickly with a small pair of pliers.

    I haven't damaged a solder pad yet, & I've done this many times, on other equipment as well.

    I just replace them with good quality electrolytics.
    Last edited by Antennaman; 17-10-20 at 02:30 PM.
    Never stand under a shadow that's getting bigger

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    I cut them in half with a small pair of sidecutters and then "prune" what is left until only the pigtails remain.

    Result...no damage to the pcb whatsoever and you are able to solder the new component to the old pigtails if need be.

    And, as Antennaman says, replace them with good quality capacitors.

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