• The forum software that supports hummy.tv has been upgraded to XenForo 2.3!

    Please bear with us as we continue to tweak things, and feel free to post any questions, issues or suggestions in the upgrade thread.

Search results

Forum Search Results Google Search Results

    1. N

      Start Up Fails When HDD Connected

      I’ve attached some further measurements on my faulty PVR. These examine the 12V and 5.8V outputs* from the power board. I’ve compared these with the 12V and 5V HDD supplies under fault-present, and fault-not-present conditions (as described in the pic titles). For ease of reference I’ve...
    2. N

      Start Up Fails When HDD Connected

      Thanks for your comments. You focussed your attention on the HDD’s +5V supply. Did you have any issues with its +12V supply, do you recall – like I have found? At one point you said that the input to the buck converter U22 which feeds U52 “is OK” (as per the ‘scope trace). Your schematic...
    3. N

      Start Up Fails When HDD Connected

      Well, those are all possible causes. However, at least conventional-style electrolytics (see the pic of the dodgy ones in the Grundig TV) are always the first port of call, especially if they are located near a heat source (such as a heatsink) which will accelerate their “drying-out”. Heat and...
    4. N

      Start Up Fails When HDD Connected

      Thanks for your comments and I have read your thread. However (as I said) I tried the power board from the fully-working spare PVR and it didn’t fix - so I don’t think that’s where the problem lies. I had hoped it was – as was the case with the Grundig TV I fixed. The attached shows that...
    5. N

      Start Up Fails When HDD Connected

      Having read through this thread, not sure what conclusions were drawn by previous contributors as it seems to have gone cold. At this time, I reckon the problem I'm having is due to a dud cap - but which one? Results attached show the problem isn't confined to the HDD's 5V supply - the 12V...
    6. N

      Start Up Fails When HDD Connected

      I’ll have a good read through this thread as I’ve been chasing-down the same (or a similar) fault with our HDR-Fox T2 for a few weeks now (since mid-Oct 2021). Fortunately, I have a fully-working spare PVR and have tried swapping the power board, the HDD and the front panel board to confirm the...
    1. N

      Start Up Fails When HDD Connected

      I’ve attached some further measurements on my faulty PVR. These examine the 12V and 5.8V outputs* from the power board. I’ve compared these with the 12V and 5V HDD supplies under fault-present, and fault-not-present conditions (as described in the pic titles). For ease of reference I’ve...
    2. N

      Start Up Fails When HDD Connected

      Thanks for your comments. You focussed your attention on the HDD’s +5V supply. Did you have any issues with its +12V supply, do you recall – like I have found? At one point you said that the input to the buck converter U22 which feeds U52 “is OK” (as per the ‘scope trace). Your schematic...
    3. N

      Start Up Fails When HDD Connected

      Well, those are all possible causes. However, at least conventional-style electrolytics (see the pic of the dodgy ones in the Grundig TV) are always the first port of call, especially if they are located near a heat source (such as a heatsink) which will accelerate their “drying-out”. Heat and...
    4. N

      Start Up Fails When HDD Connected

      Thanks for your comments and I have read your thread. However (as I said) I tried the power board from the fully-working spare PVR and it didn’t fix - so I don’t think that’s where the problem lies. I had hoped it was – as was the case with the Grundig TV I fixed. The attached shows that...
    5. N

      Start Up Fails When HDD Connected

      Having read through this thread, not sure what conclusions were drawn by previous contributors as it seems to have gone cold. At this time, I reckon the problem I'm having is due to a dud cap - but which one? Results attached show the problem isn't confined to the HDD's 5V supply - the 12V...
    6. N

      Start Up Fails When HDD Connected

      I’ll have a good read through this thread as I’ve been chasing-down the same (or a similar) fault with our HDR-Fox T2 for a few weeks now (since mid-Oct 2021). Fortunately, I have a fully-working spare PVR and have tried swapping the power board, the HDD and the front panel board to confirm the...
Back
Top