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  6. PMS GTN 750 not turning on without bat/and power

PMS GTN 750 not turning on without bat/and power

Scheduled Pinned Locked Moved TBM 850
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  • RandolfR Randolf

    @jetnoise yes, I have the latest version of PMS GTN750 v2.2.4 and as mentioned in my previous post, tried with and without the WTT mod, same results.
    From the electrical schematic in the BKSQ TBM850 manual ( https://dxhb0it26is40.cloudfront.net/manuals/BKSQ_TBM850Manual.pdf ), page 75, I can see that normally the GPS is powered by "essential radio bus 1", but without main or ESS bus power, it should probably be powered by "battery bus" and "ground clearance unit", top left of the schematic. Maybe that connection is not checked in the GTN750.

    J Offline
    J Offline
    JetNoise
    wrote on last edited by JetNoise
    #11

    @randolf

    FlightSimulator_6K6YYoGOtZ.jpg

    Had to finish my flight first ...
    Here you go ...

    Oliver

    RandolfR 1 Reply Last reply
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    • J JetNoise

      @randolf

      FlightSimulator_6K6YYoGOtZ.jpg

      Had to finish my flight first ...
      Here you go ...

      Oliver

      RandolfR Offline
      RandolfR Offline
      Randolf
      wrote on last edited by
      #12

      @jetnoise thank you for the confirmation that it shoud work. I'll keep looking.

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      • Z Offline
        Z Offline
        ZenIT_SWE
        wrote on last edited by
        #13

        Hmm, I wonder if it's a livery thing?

        J 1 Reply Last reply
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        • Z ZenIT_SWE

          Hmm, I wonder if it's a livery thing?

          J Offline
          J Offline
          JetNoise
          wrote on last edited by
          #14

          @zenit_swe
          Could be a livery, could be an outdated wtt mod or simply a corrupted install...

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          • RandolfR Randolf

            I can confirm that the PMS50 GTN750 doesn't turn on with the "radio master" switch without turning on the battery/GPU switch. If I switch out the GTN750 for GNS530, the 530 works as expected, turning on with "radio master" switch even without battery/GPU switched on.
            Tried PMS50 GNS730 with and without WTT mode, same result. I mean the WTT mode package from here https://pms50.com/msfs/aircrafts/
            Not sure where the problem is, if with PMS50 or Black Square addon.

            S Offline
            S Offline
            Sergio
            wrote on last edited by
            #15

            Same here...GTN750 does not turn on with the radio master switch on and crashbar up, however it works with the GNS530 (using default livery)

            @randolf said in PMS GTN 750 not turning on without bat/and power:

            I can confirm that the PMS50 GTN750 doesn't turn on with the "radio master" switch without turning on the battery/GPU switch. If I switch out the GTN750 for GNS530, the 530 works as expected, turning on with "radio master" switch even without battery/GPU switched on.
            Tried PMS50 GNS730 with and without WTT mode, same result. I mean the WTT mode package from here https://pms50.com/msfs/aircrafts/
            Not sure where the problem is, if with PMS50 or Black Square addon.

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            • LaurrethL Offline
              LaurrethL Offline
              Laurreth
              wrote on last edited by Laurreth
              #16

              I don't think that block diagram of the electrical system is that great. As it is, you need to set the ESS BUS TIE to EMER, and the radio master will turn on a GTN750 and the transponder when the crash bar is up. But it appears to be behaving wrong with the 750, maybe that is hooked up to the wrong bus.

              (edit) Looks like it's on the correct circuit, same as the other COM1 units.

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              • P Offline
                P Offline
                paulwareing
                wrote on last edited by
                #17

                From the discord...

                10daaad7-a45a-4ca7-aeec-e0c74607e2da-image.png

                S RandolfR 2 Replies Last reply
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                • P paulwareing

                  From the discord...

                  10daaad7-a45a-4ca7-aeec-e0c74607e2da-image.png

                  S Offline
                  S Offline
                  Sergio
                  wrote on last edited by
                  #18

                  @paulwareing Great...now it works :clapping_hands: :clapping_hands:

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                  • P paulwareing

                    From the discord...

                    10daaad7-a45a-4ca7-aeec-e0c74607e2da-image.png

                    RandolfR Offline
                    RandolfR Offline
                    Randolf
                    wrote on last edited by
                    #19

                    @paulwareing yes, thank you for relaying this! This works indeed.
                    Now I can use electronic checklists on the GTN750 before powering up the whole craft.

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                    • V Offline
                      V Offline
                      Voice of Reason
                      JF Staff
                      wrote on last edited by
                      #20

                      Yes to confirm, a message from the developer:

                      'This was actually caused by a single typo. I've fixed it for the next update, but if you want to fix it yourself, change the following line in the panel.xml file.'

                      <NAME>GTN750</NAME> ---> <NAME>GTN750_INT</NAME>

                      Hope that helps

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