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Something is very fishy there.... It should not effect power consumption at all to set the DIP switches in any configuration. If you can only get 2.557 voltage out of your regulator then your regulator can't supply enough current - it should stay ~5.5V even under the dummy load. In any case when you have the power situation sorted try leaving all the switches in the stock position (all on) Edited by user Saturday, February 20, 2016 3:59:15 PM(UTC)
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Originally Posted by: felipe  Checked the regulator with a 12R dummy load to simulate BIII power consumption gives min. 2.557VDC across the dummy load so 438mA as expected, also the regulator is adjusted for a max. current of 800mA Say what? Please specify, what is the "regulator" ? Is that your power supply to the DAC ? edit: sorry, didn't see Russ answer. Sure the "less than 5.x v" is critical. Edited by user Saturday, February 20, 2016 5:02:04 PM(UTC)
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Originally Posted by: Russ White Something is very fishy there.... It should not effect power consumption at all to set the DIP switches in any configuration.
If you can only get 2.557 voltage out of your regulator then your regulator can't supply enough current - it should stay ~5.5V even under the dummy load.
In any case when you have the power situation sorted try leaving all the switches in the stock position (all on) The target is 5.5 without load?
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Leon guide target for BIII is 5.25VDC 440mA?
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The target is 5.5v with and without load.
Under any circumstances the DAC needs 5.5v (I use 5.2v never mind that).
Which power supply (regulator) are you using ?
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Originally Posted by: avr300 Originally Posted by: felipe Checked the regulator with a 12R dummy load to simulate BIII power consumption gives min. 2.557VDC across the dummy load so 438mA as expected, also the regulator is adjusted for a max. current of 800mA Say what? Please specify, what is the "regulator" ? Is that your power supply to the DAC ? edit: sorry, didn't see Russ answer. Sure the "less than 5.x v" is critical. Yes regulator is powering BIII.
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Is Regulator == Placid ??
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Originally Posted by: avr300 The target is 5.5v with and without load.
Under any circumstances the DAC needs 5.5v (I use 5.2v never mind that).
Which power supply (regulator) are you using ? I reversed the DIP switches and now I have 5.244 Vout Edited by user Saturday, February 20, 2016 5:36:36 PM(UTC)
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Originally Posted by: avr300 Is Regulator == Placid ?? No, is Salas Reflector-D.
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Originally Posted by: felipe Leon guide target for BIII is 5.25VDC 440mA? Well, as Russ says, reversing the dip switches should have no effect on the current consumption. I can't help you with that, I'm "only" at BII. If a shunt runs out of current, by design the voltage sags. Try increasing the shunt current and see what happens.
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My regulator is set to 600mA of current & works well with the dummy load, I reversed again the DIP switches & Vout lowered to 1.089VDC & Trident LEDs don't lit. Edited by user Saturday, February 20, 2016 5:55:14 PM(UTC)
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What is the voltage at the VD input when powered? It has to be 5-5.5V(5.25 is fine)!!! If it is dropping below that you need a better supply. :) Edited by user Saturday, February 20, 2016 6:13:41 PM(UTC)
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DIP configuration is:
SW1
OFF 1,2,3,4,6, 8
ON 5,7
SW2
OFF 1,2,3,4,5,6,7
ON 8
VD input when powered 5,3V
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DIP configuration is:
SW1
ON 1,2,3,4,6, 8
OFF 5,7
SW2
ON 1,2,3,4,5,6,7
OFF 8
VD input when powered 1,82V
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I'm sure I don't need another better supply because as said before the regulator is working fine with a dummy load, is the BIII when I change the DIP swithces that drops the regulator. Edited by user Saturday, February 20, 2016 6:27:38 PM(UTC)
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Originally Posted by: avr300
Try increasing the shunt current and see what happens.
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You may be operating too close to the edge for the regulator - when the DAC comes out of mute it will naturally draw a bit more current (because it is engaging the DAC outputs)
You should be able to run the DAC with the defaults (just carefully take the controller out of the socket) - then the switches will have no effect at all. You just won't be able to use the controller's volume control - so make plans accordingly.
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Originally Posted by: avr300 Originally Posted by: avr300
Try increasing the shunt current and see what happens.
More than 600mA!!!
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Why not? Obviously it runs out of current.
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Originally Posted by: Russ White You may be operating too close to the edge for the regulator - when the DAC comes out of mute it will naturally draw a bit more current (because it is engaging the DAC outputs)
You should be able to run the DAC with the defaults (just carefully take the controller out of the socket) - then the switches will have no effect at all. You just won't be able to use the controller's volume control - so make plans accordingly. Without IC8 DIP configuration is: SW1 ON 1,2,3,4,6, 8 OFF 5,7 SW2 ON 1,2,3,4,5,6,7 OFF 8 VD input when powered 1,092V
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