My Humax Forum » Freesat HD » HDR 1000, 1010, 1100S

HDR 1000s dead

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    Retired Eng

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    HDR 1000S box completely dead.

    Display not illuminated although on one occasion showed "Starting"
    LED also only lit on one occasion

    PSU shows 12v when measured in the box at rear of connector.
    Heat sink gets quite hot
    No volts on the HDD 4 pin connector on the PCB (with drive unplugged)
    (presumably the black wires are ground and the red and yellow are 12v and 5v ?
    When Seagate drive disconnected (both plugs) Humax still seems dead.
    There is 5v on the front panel PCB connector
    The on/off button has about 3.5v across it.

    Any thoughts to help identify the fault would be most welcome

    | Fri 29 Nov 2024 15:13:42 #1 |
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    kacout

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    Check the voltage between pins 1 & 4 of BBS port - should be 3.3V and pins 1 & 4 of UART port - should be 5V.

    | Sun 1 Dec 2024 22:06:53 #2 |
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    Retired Eng

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    Very many thanks for your response kacout

    When powered up, the front panel display showed STARTING and this stayed on.
    The voltage between pins 1 & 4 on the BBS was 3.28 V
    That between 1 & 4 of both UARTS was 5.09 V

    When I powered it up again later, there was nothing on the display.
    I checked the voltage on the USB connector on the front panel and that was 4.5 V. There was 0 volts on the inners of the two Type F coax connectors. Presumably they should both have showed something between 13 and 19 Volts for the LNB ?

    What can be deduced from the above and the previous checks ?
    Do you have a circuit diagram or block diagram for this model ?

    | Mon 2 Dec 2024 16:19:02 #3 |
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    kacout

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    No problem on response.

    BBS & UART voltages are as expected and you are correct with LNB voltages. I'm afraid I have neither a circuit diagram or block diagram.

    The fact that heatsink is getting hot means that controller is working, just not doing the correct thing. These units are well known for some of the connections between the die and the substrate going open circuit - similar to the old XBox issue, so it might be worth disconnecting everything from the PCB, remove the PCB from the unit and baking in a pre-heated oven @ 125C for 10 mins. Connect eveything back up and when you go to power it back on, press and hold the channel down button while applying power so that it performs a full reset - hopefully it will work.

    | Mon 2 Dec 2024 16:41:40 #4 |
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    Retired Eng

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    Many thanks again for quick response and most helpful suggestion
    It's good to have some very knowledgeable people on this forum.

    Would a controller problem explain the lack of voltage on the F connector and also on the hard drive?
    Also the fan isn't running. Is it temperature controlled?
    Tried a resistance check but seems very high
    Any idea what the resistance should measure between red and black ?

    Will try the baking suggestion later

    | Tue 3 Dec 2024 11:38:17 #5 |
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    kacout

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    Yes if the controller does not startup correctly the board will not be initialised properly. Also the hard drive does not normally startup until after 'Freesat' logo is displayed on the screen/display. Fan is temperature dependant.

    Let me know how you get on.

    | Tue 3 Dec 2024 21:08:52 #6 |

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