When i try to increase the voltage the overrange led ligth and i've no uotput. The voltage increase circa 100mV and then stop with overrange status. I've found a primari current sensor T!,i think that is a hall effect transducer that monitors the cerrent in the primati of the power transformer. The signal of this transducer is linked to the power limit circuit in the control board. Now if this transducer is ko probabli could give a signal of max current(the transducer should give a tension with the current flow)and give the supply a overrange status. I can't find dat on Primary-Current Monitor Transformer T1 code 9100-4350 .
What do yuo think and do you know the spec of this transducer?
Questions which would assist: Hello Sorry that I am asking so many questions: When was the instrument last working correctly? When was the instrument last calibrated? What is the acMains input voltage? Are internal voltage selection switches set to correct acMains? Is internal fuse good? Is internal jumper set to correct Mains? Does 6030A have Option 100? What is the s/n of the instrument? Are ALL internal jumper cables registered correctly in respective socket? Are mode switches B1 – B6 ALL set correctly? Are +/- sensing wires correctly in place? To what value is OVP set?
when the overrange light comes on when trying to adjust output voltage above 0v that usually indiactes something is wrong with a circuit inside. Most common problems are bad capacitors/leaky caps/shorted caps. I would not pay too much attention to the transducer you are worried about, I have repaired 100's of these types of supplies and almost always there is something wrong with preregulator or regulator circuits or Bias supplies are no longer working. Most common problems are Bias supplies dead caused by failing caps. Other common problems are bad FETs inside. suggest taking covers off and first visually inspect inside and look for signs of burns, smoke, or blown up components. If nothing visual is found check all electrolytic capacitors.
The source is HP6031A, I have two with exactly the same problem, I do not know what exchanged between them because I have both the same. They began to fail after connecting to the same power. may be due to noise on the power line?. If you found the fault would appreciate if you can help. Marcelo.