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My Gigabit Switch II

Discussion in 'General Hardware' started by pestisnart, Jun 23, 2011.

  1. pestisnart New Member

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    I registered in order to say thank you.

    This is in response to an outdated thread:
    http://www.techpowerup.com/forums/showthread.php?p=1682495#post1682495

    The issue is a D-Link DGS-1008D gigabit switch which fails with a row of eternal flashing lights.

    I would have thrown it away if not for this forum and the cited thread.

    I replaced the 1000uf 16v capacitor in the power supply for the switch and it works fine again. Yes, the 1A P/S reads 11.5V in open-circuit - but mine reads 8.25V under load.

    Incidentally, when I tested the (4) 50V 2A RL201 rectifier diodes, they failed a continuity test. However, they read 18 Ohms forward. This is aparently within spec - and the P/S works fine. I am posting this via my working DGS-1008D.

    Thank you again for the helpful discussion.

    --pestisnart

    [keywords: D-Link Dlink gigabit switch DGS-1008D DGS1008D DGS 1008 1008D flashing ]

  2. pestisnart New Member

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    ALSO fixed: D-Link Broadband Router DI-704UP

    As a result of the success in repairing the P/S for the (above) DGS-1008D, I dredged up from the bottom of the parts-box a D-Link Broadband Router DI-704UP that had failed years ago. (This was mostly out of curiosity as routers are cheap these days.) I had to wonder if the DI-704UP had not suffered a similar failure - the P/S. Anyway, here's what I found:

    The DI-704PS uses a smaller-sized switching P/S (model: M1-10S05). I opened it up in the tradidional way (dremel-with-cutting-wheel around the seam). It is quite different inside than the DGS-1008D P/S. However, there was a distinct similarity which I was looking for: a capacitor OF THE SAME BRAND that failed in the DGS-1008D. This P/S had a 330uF 25V cap bulging (but not split) at the top. It was the same brand as the failed 1000uF cap in the other P/S. The brand is "TEAPO". It is green plastic wrapped with gold/bronze-colored lettering.

    I did not have any 330uF caps on hand - just 220s and 470s. So I used a 470uF 35V cap in place of the green TEAPO 330uF 25V. Now the P/S works fine and it powers up the router nicely.

    Before the cap replacement, the 5V rated P/S read 5V o/c and 3V under load. After replacing the cap the P/S reads 5V o/c and 5V under load - just as you would expect from a switching supply.

    Evidently TEAPO brand caps are part of "the capacitor plague".

    Thank you again for putting me on to this idea, PowerUp!

    --pestisnart

    [keywords: M1-10S05 M1 10S05 DI 704 704UP]

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