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  1. partyanimallighting

    Voltage fluctuation on 12VDC/24VDC dual output P/S

    Thanks for the prompt feedback Harald. I was thinking along the lines of "ferrite bead" myself or some sort of line filter similar to those used on AC lines. As for the resistor, the image is of the least scorched one in the lot on the four power supplies so that's the reason why I included the...
  2. partyanimallighting

    Triple output power supply blowing main fuse

    It was not possible without your assistance and the others also but I'd still like to get a little feedback to give myself some learning closure re: The low voltage reading on the 390VDC leg with the MOSFET removed, is the MOSFET responsible for boosting this output up to the required 390VDC on...
  3. partyanimallighting

    Voltage fluctuation on 12VDC/24VDC dual output P/S

    Soooooo.....it's been a while but I'm trying to get four of these power supplies repaired. Two of them carry 450V 100μf caps and the other two carry 450V 220μf caps (maroon brown color) but otherwise are identical. As I mentioned before, I swapped out all the 25V and 35V caps on one of these...
  4. partyanimallighting

    Voltage fluctuation on 12VDC/24VDC dual output P/S

    Yup. Sorry about the typo. :(:(:(
  5. partyanimallighting

    Voltage fluctuation on 12VDC/24VDC dual output P/S

    Hi guys. Six months later but never too late, especially with what's happened to our world for these first few months. Anyway, I'm at it again with these four small power supplies. I took 73's de Edd's advice and went a step further. I pulled all the 25V and 35V caps and tested them and all had...
  6. partyanimallighting

    Triple output power supply blowing main fuse

    No responses to the above questions so here's the update. I managed to source the power MOSFET locally at an exorbitant cost and swapped it out in each power supply and the problem disappeared so it WAS the power MOSFET. I have to say, as a novice, I've learnt a lot just from this attempt and...
  7. partyanimallighting

    Triple output power supply blowing main fuse

    Here's an update on testing. I tried a 40W bulb and the voltages on the GBU910 were still low, <2VAC and <2VDC on the relevant legs. So then I followed Harald Kapp's advice and tested the (8GL28) FHA20N60 primary power MOSFET. On the PCB I got continuity across all legs so, I removed it as...
  8. partyanimallighting

    Triple output power supply blowing main fuse

    Hi Wizards! It's been a while but I don't think an explanation is necessary with what has happened to our world over the past few months. Soooooo......being jobless, I've gotten some free time to start trying to resolve all my little repair problems one by one, so it's back to this power supply...
  9. partyanimallighting

    Triple output power supply blowing main fuse

    Martaine2005, can you explain to me how putting the 100W incandescent bulb in series across the fuse terminals will prevent the blowout? Does the bulb create enough current draw to decrease or cancel out the short? Please remember I'm not a trained technician so I would like to understand the...
  10. partyanimallighting

    Triple output power supply blowing main fuse

    I'm not an experienced technician and I know this power supply puts out 380VDC so I'm gonna be extra careful running any tests. A large amount of these lighting units were powered up at the same time so I'm figuring the current draw from all the lamps striking at the same time screwed up the...
  11. partyanimallighting

    Triple output power supply blowing main fuse

    Really? I kind of remember seeing old electricians testing electrical shorts with a bulb and socket with two wires. Here's the funny thing.....I'll have to go buy a 100W incandescent!! Everything I have is LED!! I might have really old stock of effects lighting lamps like 300W 120VAC 64514's...
  12. partyanimallighting

    Triple output power supply blowing main fuse

    Hi Wizards, I've got two filed units with blown power supplies. I've swapped out the power supplies in the units with new power supplies but I want to attempt to repair the blown power supplies. They are 120VAC ~ 24VDC/36VDC/380VDC and the 24VDC leg drives cooling fans, the 36VDC drives the main...
  13. partyanimallighting

    Voltage fluctuation on 12VDC/24VDC dual output P/S

    Thanks 73's de Edd!! You guys were so correct. I flipped once when I should have flipped twice!! :(:( I'll decipher and translate the electronic jargon of which you speak, double check to be sure I understand and follow your instructions thoroughly and report back soon. Now, I am no electronics...
  14. partyanimallighting

    Voltage fluctuation on 12VDC/24VDC dual output P/S

    I do not think there's an error. I reversed the bottom image to match the top image.
  15. partyanimallighting

    Voltage fluctuation on 12VDC/24VDC dual output P/S

    Tried the reflow. Same result. Fluctuating low voltages at output stage.
  16. partyanimallighting

    Voltage fluctuation on 12VDC/24VDC dual output P/S

    Thanks Martin. I'll do a full reflow on all components in the morning, test and report back to the forum.
  17. partyanimallighting

    Voltage fluctuation on 12VDC/24VDC dual output P/S

    Hey wizards, I had a couple non-functioning LED PAR's with blown power supplies which I replaced. I checked out the faulty power supplies and I am did not see anything faulty except for a scorched resistor (23ohm??), highlighted in yellow in the image so I replaced it but the output voltages...
  18. partyanimallighting

    Power Issue?

    Thanks again. The original response was really fast! :):):)
  19. partyanimallighting

    Power Issue?

    Hey (*steve*), the problem was not the regulator or the console. The bleeping power supply. I didn't checking about checking it because the unit started up fine on more than one occasion and I was getting DC voltage on the regulator. The power supply is rated at 9VDC 1.0A and when I checked it...
  20. partyanimallighting

    Power Issue?

    Hi Wizards, I'm having a little issue with a dimming console and I haven't been able to pinpoint the problem. I used this unit last weekend and it worked fine but I tried powering it up afterwards and there was no display and all the LED's were flashing constantly. I disassembled the unit and...
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