Re: HP 4540s immediately turn off
We should have 25 voltage on gate for correct output at the circuit so KBC measure via comparing and allow current pass via signal processing logic.
Replace cmsrc resistor and remove current limit resistor and check which side is shorted to ground or measure resistance to ground for both pads.
One other way is measure ACN line resistor ohm and at clr it should be sum of all resistors attached to the line.
We should have 25 voltage on gate for correct output at the circuit so KBC measure via comparing and allow current pass via signal processing logic.
Replace cmsrc resistor and remove current limit resistor and check which side is shorted to ground or measure resistance to ground for both pads.
One other way is measure ACN line resistor ohm and at clr it should be sum of all resistors attached to the line.
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