Hello I have a power supply from a satellite receiver that when I check the output voltages they are pulsating from 0V to the right voltage and back to 0V. is it capacitor or rectifier problem??
If *all* the rails pop up to the correct value, then it's far less likely to be the rectifiers. (And the one's you're looking at will be the ones on heatsinks, NOT the ones which rectify the mains)
Hello I have a power supply from a satellite receiver that when I check the output voltages they are pulsating from 0V to the right voltage and back to 0V. is it capacitor or rectifier problem??
Sounds like the power supply is hiccuping due to a short in the secondary of the unit.
Would it be possible to get a photo of the units circuitry?
Regards,
Relayer
If you have a PMPS there is a cap on the PWM and FET, value should be about 47-100mf usually at 50vdc. This is a very common problem with this type of power supply.