Hi all,
I'm looking for the collective's input before I start spending Aviation Money Units.
I have a legacy 12 with dual Dynon screens; the original D1000T on the left and a plain D1000 on the right. I typically boot up the D1000T using its SV-BAT-320 so I can see EMS data during startup. Lately, the D1000T is not able to boot reliably, from either the SV-BAT-320 or the ship's ES PC680 Odyssey battery. First it started hanging up when powered by the SV-BAT-320, but booted normally from the Odyssey and I simply assumed I'd need a new SV-BAT-320. Then, the D1000T started hanging the same way when powered by the Odyssey.
Both of the batteries are more than 10 yr old. The SV-BAT-320 still passes the 45 min discharge test. The Odyssey cranks the engine without hesitation, but it is no longer capable of booting the D1000T or keeping the D1000 alive during cranking. That makes no sense. I suspect one, or both, of the batteries is/are failing despite the test result and starting ability.
The real puzzler is that if I hit the starter, then the D1000T exits the hung state and boots normally.
Does anyone know if the D1000T has a particularly high inrush current? I find it hard to believe that it could pull enough current to sag the Odyssey voltage very much since the Odyssey is still putting out lots of cranking amps, but I really don't know anything about the linearity of the V-I curve of the Odyssey.
My only theory is that when the D1000T gets hung up, it can't respond to the Power Down command (Button #1 for 6 seconds) and is just spinning its bits, but when I hit the starter there's enough of a voltage drop that the D1000T goes back to a known state and restarts the boot procedure from scratch, but now there's voltage coming from the running generator and/or the SV-BAT-320.
Does that theory make sense to anyone? Any diagnostic suggestions?
Thanks,
-dbh
I'm looking for the collective's input before I start spending Aviation Money Units.
I have a legacy 12 with dual Dynon screens; the original D1000T on the left and a plain D1000 on the right. I typically boot up the D1000T using its SV-BAT-320 so I can see EMS data during startup. Lately, the D1000T is not able to boot reliably, from either the SV-BAT-320 or the ship's ES PC680 Odyssey battery. First it started hanging up when powered by the SV-BAT-320, but booted normally from the Odyssey and I simply assumed I'd need a new SV-BAT-320. Then, the D1000T started hanging the same way when powered by the Odyssey.
Both of the batteries are more than 10 yr old. The SV-BAT-320 still passes the 45 min discharge test. The Odyssey cranks the engine without hesitation, but it is no longer capable of booting the D1000T or keeping the D1000 alive during cranking. That makes no sense. I suspect one, or both, of the batteries is/are failing despite the test result and starting ability.
The real puzzler is that if I hit the starter, then the D1000T exits the hung state and boots normally.
Does anyone know if the D1000T has a particularly high inrush current? I find it hard to believe that it could pull enough current to sag the Odyssey voltage very much since the Odyssey is still putting out lots of cranking amps, but I really don't know anything about the linearity of the V-I curve of the Odyssey.
My only theory is that when the D1000T gets hung up, it can't respond to the Power Down command (Button #1 for 6 seconds) and is just spinning its bits, but when I hit the starter there's enough of a voltage drop that the D1000T goes back to a known state and restarts the boot procedure from scratch, but now there's voltage coming from the running generator and/or the SV-BAT-320.
Does that theory make sense to anyone? Any diagnostic suggestions?
Thanks,
-dbh
