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Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

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  • Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

    I plan to do some testing to my receiver to bypass the internal power supply. well at least open it and test the output voltages and power consumption. if all goes well I may wish to modify my Direct TV receiver to work on a DC voltage. I am interested in others comments regarding this as well as power consumption results. I will open mine in the next day or so, will post my results here.
    4x suniva 245 watt panels. 1x Outback Flex80. 8x Trojan T-105's on 24 volts. 3x 24v to 12v. and 3x 24v to 19v step down regulators

  • #2

    Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

    Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

    Don't be surprised if you find a number of different voltages are required, and supplied by the original built in power supply. Would be awesome it it ran internally on 12 volts, but I fear it will be far more complicated, just because they can make it that way.
    1900 watts PV, (1000 watts PV feeding MidNite Classic 150; 900 watts PV + 160 watts micro hydro both feeding into a single shared Morningstar TS-MPPT-60) ; Xantrex Pure Sine 1800/12 for heavy loads; Xantrex Pure Sine 1000/12 on 24/7 for everything else; six Rolls Surrette 2 volt L16 @ 12 volts.
    Domestic hot water totally provided by the sun 8 months out of every year via thermal panel.

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    • #3

      Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

      Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

      you may be correct, but I am guessing the highest voltage is the Vert on the LNB, so should be 18to24v. got my hopes up., I just cleaned out my media and power closet. removed all the old AC wires and extension cords. trying not to loose any cameras or disrupting anything else. There is only 2 devices plugged into AC now, used to be 50 to 60 AC connections because of all the cameras and all the other AC to DC plug adapters. amazing what a difference cleaning it out, just to get to the direct TV box. still like a Rat's nest though.
      4x suniva 245 watt panels. 1x Outback Flex80. 8x Trojan T-105's on 24 volts. 3x 24v to 12v. and 3x 24v to 19v step down regulators

      Comment


      • #4

        Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

        Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

        I've moved this thread to the technical section because it could get very technical indeed!
        1220 Watts of PV, OB MX60, 232 Amp hrs, OB 3524, Honda eu2000.

        Ohm's Law: Amps = Volts / Ohms
        Power Formula: Watts = Volts * Amps

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        • #5

          Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

          Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

          try searching for 'schematic' (s) plus the model number of the receiver etc, you might hit pay-dirt.
          I did on the schematic for an instant on water heater a while back, had voltages from 5 to 117v dc and ac...?? who would have guessed...
          100% Off Grid @ 51* 46' N lat 124* 44' W long

          New House system: coming - 2 arrays @ 2240W
          CL150&Epanel 2 @140 W 12v PVs , 24V C&D AT-15P AGM @ 950Ah
          + CL150 2@120W 12 V panels, 24V C&D AT-15P AGM @ 950Ah Linksys wet54g - WiFi bridge
          Cotek ST1500W inverter, TBS 30a-24v Omni-charger, Honda Eu3000is,

          Guest cabin system: 3 - 70W panels to BS 2000e CC, with 2 - 100 ah 12v SAFT wet NiCd's , 600W TSW Inverter

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          • #6

            Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

            Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

            Try powering your LNB with variable voltage power supply and see at which voltage it shuts off. It may work way below 18V. Post pics, will be watching your progress.

            Edit: Here is a guy who got Intel Core i5 desktop computer running at 5.9 watts. He even measured each chip's individual power consumption on a mother board.

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            • #7

              Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

              Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

              Originally posted by AntronX View Post
              Try powering your LNB with variable voltage power supply and see at which voltage it shuts off. It may work way below 18V. Post pics, will be watching your progress.
              One potential reason that the LNB may be specced to work at less than the normally delivered voltage is to allow for the IR voltage losses in the maximum allowed length of coax from the power inserter to the dish. If you have a longish coax already, you may benefit from adding the DC in closer to (next to) the dish using larger wires and power-insert adapter. You may need to put a DC-blocking adapter next to the box if you do this.
              Sunny Boy 3000US, 18 x BP Solar 175b panels, installed 2009.

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              • #8

                Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

                Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

                Originally posted by AntronX View Post
                Try powering your LNB with variable voltage power supply and see at which voltage it shuts off. It may work way below 18V. ...
                Won't work if the system is a Directv system. The LNB retransmits either odd or even transceivers on the coax based on a 13 or 18 volt input.
                12 kw Generac, Honda EU3000is, 4.2 kw APC UPS powered either by battery or a Prius. Really.

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                • #9

                  Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

                  Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

                  Originally posted by techntrek View Post
                  Won't work if the system is a Directv system. The LNB retransmits either odd or even transceivers on the coax based on a 13 or 18 volt input.
                  Basically the same technology used by the Bell system in Canada.
                  1900 watts PV, (1000 watts PV feeding MidNite Classic 150; 900 watts PV + 160 watts micro hydro both feeding into a single shared Morningstar TS-MPPT-60) ; Xantrex Pure Sine 1800/12 for heavy loads; Xantrex Pure Sine 1000/12 on 24/7 for everything else; six Rolls Surrette 2 volt L16 @ 12 volts.
                  Domestic hot water totally provided by the sun 8 months out of every year via thermal panel.

                  Comment


                  • #10

                    Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

                    Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

                    Heh, interesting. Did not know that.

                    Comment


                    • #11

                      Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

                      Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

                      Wayne. Actually Bell receivers in Canada and Dish network in USA have the same manufacturer. Starchoice, now called Shaw direct and 4dtv In usa used same manufacture. Bell and direct tv have citcular polarity, Right handed for one polarity and left handed for other polarity. shaw direct and 4dtv use linerior polarity, horizontal for one polarity and verticle for other polarity. Polarity for all the systems mentioned have 14 volt for one polarity and 18 volt for other polarity. Preety simple EH. The mpeg free to air receivers pick up all the unscrambled signals that are broadcast on all satelites in the Clark Belt. The big old satelite dishes still get you lots of free tv to watch. You can also use old primestar dishes ro get free programing off KU band satelite dishes. Previously I have said satelites are my other hobby. Here is a good website to learn more about the satelite hobby for anyone that don,t know about it. http://www.skyvision.com/ Solarvic another added link http://global-cm.net/
                      Last edited by solarvic; November 22nd, 2012, 19:23.
                      16 KC 158G & 3 KD185GX-LPU panels on Fronius IG PLUS 3.0-1 inverter and 14 SHARP NDU3A & 1 KD185GXU panel on FRONIUS IG-3000 inverter. All mounted on pole top racks. Retired and enjoying it!!

                      Comment


                      • #12

                        Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

                        Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

                        Yeah, I used to be an installer for the ExpressVu / Bell systems as part of my job, both before and after they transitioned to the present transmission system, but that ended back in 2007.
                        Never got involved with Starchoice / Shaw. Interesting systems. Of course I prefer Bell. Hahahaha
                        1900 watts PV, (1000 watts PV feeding MidNite Classic 150; 900 watts PV + 160 watts micro hydro both feeding into a single shared Morningstar TS-MPPT-60) ; Xantrex Pure Sine 1800/12 for heavy loads; Xantrex Pure Sine 1000/12 on 24/7 for everything else; six Rolls Surrette 2 volt L16 @ 12 volts.
                        Domestic hot water totally provided by the sun 8 months out of every year via thermal panel.

                        Comment


                        • #13

                          Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

                          Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

                          Just happened to have a satellite receiver on the bench.
                          It is a Topfield TF4000F, FTA (free to air).
                          We got rid of Dish and Direct.
                          So anyway, here is what I found.

                          The power supply is connected to the line at all times.
                          There is a so called power switch but all it does is put the logic into standby
                          Line voltage is rectified directly then re-chopped @ approx 80 KHz.
                          The chopper transformer has 6 taps on the secondary.
                          Each tap has a half wave rectifier resulting in 3.3, 8, 15, 17, 22, and 30 volt outputs.
                          In addition, it looks like the main board has regulator chips generating 5 es 3.3 v for the logic.
                          It looks like the 30 V is being fed to the front end module.

                          This in not a good candidate for running directly from alternative power.
                          You could use a small inverter ahead of it and turn it off when you are not using it.

                          However, there is precedent for keeping the LNB powered at all times.
                          It keeps it a little warmer hence drives off water and makes it less easily damaged by lightning.
                          Lightening damage is the biggest problem we have with satellite systems.
                          I maintain about 50 of them.
                          We loose approx 3 a year usually in lightening storms.
                          20-Suntek 270 W on single axis tracker, 20-Suntek 290 W fixed, 4-XW60, two strings Trojan L-16H, One string Interstate L-16,
                          XW6048, 4-2500 W MSW inverters connected through 10KW xformer, 10 KW Kohler LP remote start, Home built 60 amp charger,
                          Modified Kohler transfer grid/solar switch. 5 Ton water source heat pump open loop, runs off solar with VFD, DHW provided by hp,

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                          • #14

                            Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

                            Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

                            I have heard of the topfield brand name before but never seen one. Most of the fta receivers I have had had a main power swirch on the back of the receiver that cut all the power to receiver. Are you saying the power switch on the front of receiver doesn,t completely shut off power? I agree with you if that is what you mean. In oime recent years a lot of the receivers don,t last too long due to the poor Chinese caps used in them. I usually turn off the power or unplug the receiver because of the cap problem. I suspect that that might be why some of the xantrex GTI inverters have a short lifetime. BADD CAPS. The story I heard is some Chinese CAP manufacturer tryed to pirate another company,s formula they used to make the Caps. Only problem the original company suspected that thier cap formula,s were bieing stolen so they changed the formula enough that the caps wouldnt last. The Chines company made millions of them and a lot of them got used in tv,s, satelite receivers and other electronics. solarvic
                            16 KC 158G & 3 KD185GX-LPU panels on Fronius IG PLUS 3.0-1 inverter and 14 SHARP NDU3A & 1 KD185GXU panel on FRONIUS IG-3000 inverter. All mounted on pole top racks. Retired and enjoying it!!

                            Comment


                            • #15

                              Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

                              Re: Direct TV, DishNet, DVR's power usage, and input power Modifications (Discussion)

                              Originally posted by Ken Marsh View Post
                              Just happened to have a satellite receiver on the bench.
                              It is a Topfield TF4000F, FTA (free to air).
                              We got rid of Dish and Direct.
                              So anyway, here is what I found.

                              The power supply is connected to the line at all times.
                              There is a so called power switch but all it does is put the logic into standby
                              Line voltage is rectified directly then re-chopped @ approx 80 KHz.
                              The chopper transformer has 6 taps on the secondary.
                              Each tap has a half wave rectifier resulting in 3.3, 8, 15, 17, 22, and 30 volt outputs.
                              In addition, it looks like the main board has regulator chips generating 5 es 3.3 v for the logic.
                              It looks like the 30 V is being fed to the front end module.

                              This in not a good candidate for running directly from alternative power.
                              You could use a small inverter ahead of it and turn it off when you are not using it.
                              This is what I was expecting. "it ain't simple" and it would be a huge job to start from scratch to redesign a new power supply. The results would definitely not be worth it, nor as good as the original power supply. That's my opinion anyway. I've done a lot of crazy things in electronics, but wouldn't consider this project for one second.
                              1900 watts PV, (1000 watts PV feeding MidNite Classic 150; 900 watts PV + 160 watts micro hydro both feeding into a single shared Morningstar TS-MPPT-60) ; Xantrex Pure Sine 1800/12 for heavy loads; Xantrex Pure Sine 1000/12 on 24/7 for everything else; six Rolls Surrette 2 volt L16 @ 12 volts.
                              Domestic hot water totally provided by the sun 8 months out of every year via thermal panel.

                              Comment

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