| Electronics > Repair |
| HP 53310A - Power supply troubles |
| << < (3/7) > >> |
| SoundTech-LG:
Had mine for a few days. All options except oven, but I'll use a GPSDO or Rubidium Ref. Cleaned it out thoroughly. Today I took the PS apart, pulled the board, and inspected carefully for any signs of leakage around the caps. None showing, but I still need to check the supplies. There seems to be a few different threads for this analyzer. Quite a handy piece. Saw someone used 2 MeanWell supplies to fit inside the case, rather than the labor of changing all those caps, and saving some current waste at the same time. |
| kj7e:
--- Quote from: SoundTech-LG on May 06, 2019, 01:35:48 am ---Had mine for a few days. All options except oven, but I'll use a GPSDO or Rubidium Ref. Cleaned it out thoroughly. Today I took the PS apart, pulled the board, and inspected carefully for any signs of leakage around the caps. None showing, but I still need to check the supplies. There seems to be a few different threads for this analyzer. Quite a handy piece. Saw someone used 2 MeanWell supplies to fit inside the case, rather than the labor of changing all those caps, and saving some current waste at the same time. --- End quote --- You will need to pull a few caps to see if they are leaking, at that point may as well just replace them. Its really not that big of a job, I fully re-capped two of them recently. I saw the post where the computer supplies were used, that looked like more work than just re-capping the original supply. |
| wn1fju:
"Saw someone used 2 MeanWell supplies to fit inside the case...." I was the guy who did this and I unfortunately must conclude that I don't recommend this solution. Indeed, the Meanwell supplies exhibit some sort of switching noise which was easily picked up by the 53310A circuitry, despite my attempts to shield the supplies. I don't remember the exact frequencies, but it was in the 0-100kHz range as expected. Ultimately, I went back to the original Boeschert supply - after I fixed it, of course! |
| SoundTech-LG:
Well that is certainly useful information. :-+ I won't be going down that road then. I checked carefully around all caps, and don't see any evidence of leakage, and the unit operates flawlessly, passing all self tests as well. I hate to tear it down to board level again. I'll check the supplies for voltage, and ripple, and give it more thought. |
| maxwell3e10:
I suspect it depends on the history of the instrument. At work we have 3 of them and none had problems so far. They are powered on nearly continuously. Electrolytic capacitors start to fail if not used for a long time. So if your unit was in storage previously, its more likely to start failing once turned on again. |
| Navigation |
| Message Index |
| Next page |
| Previous page |