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Thread: Another VAST box dead power supply??

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    Pot luck as I have had one die within weeks, another after 13 months, bought 2 for a neighbour to have one die while I was on line doing the activation (refurbished) yet another is way over 2 plus years old and hasnt missed a beat, switched on 24/7 and channels get changed occasionally.
    I believe the new models can come with the later Remote and are ready for PVR.
    I dont know why you want a UEC but there are others on the market so its worth checking.
    Remember what ever is on the market MUST be VAST approved before it can be sold otherwise it will not work so that at least says it be of reasonably quality for the manufacturer to have it VAST approved.

    Lastly, read or check sales regarding repairs as some sellers (online at least) require the buyer to deal directly with the manufacturer.
    I stand unequivicably behind everything I say , I just dont ever remember saying it !!



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    I think the Vast UEC DSD4121 RV comes with an External 240V/12Volt DC power supply ...... making it easier to change the power supply if needed
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    Quote Originally Posted by David071 View Post
    Hi everybody,
    I am looking at buying an Altech UEC 4121 RV VAST receiver for Christmas but don't want to buy a problem! There seems to have been a lot of failures with these boxes. Just wondering what everybody thinks. I am a bit put off from buying the UEC 4121 receiver from reading some of these threads! Also wondering about the PVR functionality as well of the receiver. I believe you need a separate remote and pin code to access the PVR side of the receiver?
    Any other recommendations for a Vast box would be appreciated.Thanks folks!
    If you don't want a twin tuner model then the SatKing DVBS2-800CA is the better buy. This is ready for recording out of the box and you can watch one programme whilst recording another to your usb drive if the programmes are on the same transponder. Nice UI also.

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    I must be the lucky one have had 3 4121 boxes and all still work without problems, now have 3 satking boxes and one of them failed
    Took it back to sciteq and got it replaced no problems, I know other installers in the area are using the satkings as they tend to work quite well without many issues

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    I have got a few UEC Vast STB & none have failed yet .......
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    Quote Originally Posted by transit View Post
    If you don't want a twin tuner model then the SatKing DVBS2-800CA is the better buy. This is ready for recording out of the box and you can watch one programme whilst recording another to your usb drive if the programmes are on the same transponder. Nice UI also.
    Satking gets my vote.

    Have two units operating for just over two years now....no problems (touch wood).

    External 12V supply means they can be operated on battery, or any inexpensive regulated 12V/2A powerpak.

    Also agree the UI is sweet - intuitive, good graphics and colour scheme.

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    For over 2 years UEC were the only stb available for VAST so there must be hundreds if not several thousand in use all around Australia and UEC are still in business so their failure rate cant have been too bad, only to the users who had to get it fixed.
    I stand unequivicably behind everything I say , I just dont ever remember saying it !!

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    Hi all, just browsing old threads, anyone got a replacement P/S board for one of these? My STB has no lights, perhaps a deal for a good one can be done. Cheers,

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    Quote Originally Posted by Colcam42 View Post
    Hi all, just browsing old threads, anyone got a replacement P/S board for one of these? My STB has no lights, perhaps a deal for a good one can be done. Cheers,
    Are you able to advise us of the model number of your unit?
    Is it the 4121 unit that has an external 240V to 12V supply, or does the unit you have have the 240V power supply built in?

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    Default Replacement resistors

    As Antennaman mentioned R3 and R4 on the power board is a common failure with these boxes. I have replaced quite a few for customers now.
    The original resistors look like ¼watt carbon types. I always replace them with ½watt metal film types and have not yet had a failure reported on a repaired board.
    As the cost of these resistors is only a few cents I recommend that even though the original resistors are well within their nominal power rating.

    The DSD4121 has the power supply internal. The later model DSD4121RV has an external 12 volt power pack. If the 12V pack fails (haven't come across one yet) it can be replaced with any 12V regulated power pack with the correct size plug (and they are cheap).

    Jeff
    Last edited by JeffH; 02-06-16 at 01:57 PM.

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    Quote Originally Posted by VK4TIM View Post
    Are you able to advise us of the model number of your unit?
    Is it the 4121 unit that has an external 240V to 12V supply, or does the unit you have have the 240V power supply built in?
    Hi VK4TIM, sorry to be so long in replying but other events overtook us. The box is the one with the 240v built in, if you can help, can you PM to me so that I get it sooner? cheers,

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    Just wondering how should a dead power supply out of a UEC DSD4121 be disposed of saftely ?

    Are they safe to be stored in a cardboard box in your cupboard ? are they a fire risk ..... etc ....
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    Quote Originally Posted by OSIRUS View Post
    Just wondering how should a dead power supply out of a UEC DSD4121 be disposed of saftely ?

    Are they safe to be stored in a cardboard box in your cupboard ? are they a fire risk ..... etc ....
    About the worst thing likely is leaky electro caps.

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    Quote Originally Posted by Hudson Pratley View Post
    Relaced faulty R3 & R4 to fix one, Replaced C10 to fix the other.
    Fixed a number of client UEC boxes with Antennamans advice as well.
    4.6m C band dish, numerous Strong boxes, GTsat V8 Nova and even an old BMAC somewhere ---

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    Default Vast Power supply

    Thanks for the info, any chance of putting a picture up showing what needs to be replaced.
    Cheers

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    Quote Originally Posted by 88978123 View Post
    Thanks for the info, any chance of putting a picture up showing what needs to be replaced.
    Cheers
    The component numbers (eg: R1 R2 C10 etc) are marked on the circuit board... easy to find.

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    Hi can I get a cheaper satellite set top box for vast satellite dish or do I have to pay the stupid amount for a vast satellite set top box which don't last.. last one only lasted 1 and a half years will not pay that much again please help over not watching Vikings due to very poor reception through a anntena set top box would rather go back to fuzzy reception at least we could watch it not like now glitchie crap most days a can only get 3 channels HELP ME PLEASE
    Last edited by brita; 19-01-18 at 02:30 AM.

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    What make/model of VAST decoder do you have? (It may be economical to repair it).

    Unfortunately, if you live in an area where you have to rely on VAST, then you have little choice.

    VAST decoders from all manufacturers are similarly (over) priced.

    Personally, I've found the Satking models to be more reliable, compared to UEC.

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    Quote Originally Posted by mtv View Post
    Personally, I've found the Satking models to be more reliable, compared to UEC.
    UEC and reliability is not the best.

    The Humax Twin Tuner is also a great VAST box. Probably the best for ease of use and features, with the Satking very close behind.

  • #40
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    Default SHK75-11 diode

    My DSD-4121 just had exactly the same problem as the OP. It is 7 years old and has the PJ321R rev 0 power supply. I took the power supply out and found that C10 had bulged and the diode that feeds it had obviously overheated. The diode is marked SHK75-11. It is manufactured by Samsung but I am unable to source it. Does anyone know of an equivalent I can use instead?

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