Search results

Search Forums New Posts
  1. partyanimallighting

    Voltage Regulator Problem on Moving Head mainboard

    Hey guys, I found a 16V 470UF ecap off an old pcb and tested it before I soldered it to the pcb across the existing cap. I booted up and tested and the problem is still there, no changes. So that suggests to me with my little knowledge that it's not the cap and it points back to the regulator...
  2. partyanimallighting

    Voltage Regulator Problem on Moving Head mainboard

    Hi 73's de Edd. You have helped me before in the past so it's good to hear from you and get your input also. So you think it's probably the capacitor and not the regulator? I understand what you're saying, that wear and tear have broken down the functionality of the capacitor but the thing is...
  3. partyanimallighting

    Voltage Regulator Problem on Moving Head mainboard

    Hi guys, I took some continuity readings off the regulator on the working PCB and I've posted them in the attached image. I then powered up the unit and measured voltages on pins 1, 2 and 4 and attached these also so I hope this helps. Martaine2005, I took the voltage readings by attaching...
  4. partyanimallighting

    Voltage Regulator Problem on Moving Head mainboard

    Did I mention that this pcb is $140.00 from Chauvet Parts plus overseas shipping and Customs and handling charges? Hence my wanting to repair the pcb if it's a simple enough problem like a blown regulator.
  5. partyanimallighting

    Voltage Regulator Problem on Moving Head mainboard

    Hi guys. Thanks for the fast feedback. The good news is, I myself like symmetry so I do have two units but the other unit had a lamp strike problem. This problem was caused, strangely enough, by two small 3 wire 60MM sensor fans located in the front of the unit that I assumed were not the cause...
  6. partyanimallighting

    Voltage Regulator Problem on Moving Head mainboard

    Hi guys, I have a problematic moving head with non-functioning shutter, focus and zoom stepper motors. There is one specific mainboard that drives these stepper motors and the 28VDC coming into this PCB is fine so I'm guessing it's the voltage regulator that's feeding the stepper motors and the...
  7. partyanimallighting

    Problem on high voltage leg on triple output power supply.

    I ran the same load test on the second power supply and there were no voltage issues on the 24VDC or the 36VDC legs. The attached LED diode plate functioned well and there was no dipping or fluctuations on the 36VDC leg either. However, the problem persisted on the high voltage side (390VDC) as...
  8. partyanimallighting

    Problem on high voltage leg on triple output power supply.

    OK. Based on the comments, there is one common output, which is then divided into three separate outputs (24VDC, 36VDC and 390VDC). So I connected the LED driver and diode plate and tested voltages. With the LED plate's output at zero, the power supply's lower voltages had correct readings...
  9. partyanimallighting

    Problem on high voltage leg on triple output power supply.

    I can connect an LED driver and a diode plate to the 24VDC output and adjust the output to the diodes from minimum to maximum output accordingly. Do you think that this will be appropriate to check the 24VDC output? I'm trying to get a grasp of the post and I am understanding that the regulation...
  10. partyanimallighting

    Problem on high voltage leg on triple output power supply.

    Thanks Harald. It's actually a completely different model to the model with the previous problem.
  11. partyanimallighting

    Problem on high voltage leg on triple output power supply.

    He guys. Me again. I am in need of assistance once again with two AC/DC power supplies. The power supplies I would like to repair are 80VAC-120VAC Input ~ 390VDC/36VDC/24VDC output and I'm getting very high DC voltages (at start up, 160VDC then climbing steadily to over 430VDC) on one power...
  12. partyanimallighting

    Triple output power supply blowing main fuse

    Well, I'm back. As I updated before, I replaced the FHA20N60 MOSFET with what was available in my little island, G20N60 and the power supply powered up fine with the correct output voltages. So I tried installing it into a Platinum 5R moving head to test a while ago. This is not the original...
  13. partyanimallighting

    Help identifying film capacitor value

    Thanks guys. I'll source it online.
  14. partyanimallighting

    Help identifying film capacitor value

    Hey guys, I have an old (read ancient) 120VAC Tripplite voltage regulator that recently went up in smoke. When I opened it up, a varistor and a film capacitor bridged across the live and neutral legs on one of the Edison receptacles were completely burnt out. The adjacent receptacle was fine so...
  15. partyanimallighting

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

    So this is what I've done so far. I had to pull a few components to get their value but that all goes to the learning experience. Please take into consideration that this is my first attempt at drawing a schematic so that brings me to my first question. Is there anywhere that can I download a...
  16. partyanimallighting

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

    And I don't have a functional working unit to test with anyway. I think I'll put them on the back burner and move onto the two triple output power supplies waiting in the wings. I'll still try the schematic in the interim based on your example.
  17. partyanimallighting

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

    So......if it is a linear voltage regulator it's possible that it could be the cause of the problem as it's common to all four power supplies? I could check the voltage readouts on the legs, couldn't I? Creating a schematic from the PCB (wow!!) seems a bit much for me. :confused::confused: With...
  18. partyanimallighting

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

    I replaced the resistor with a new 27Ω that I found lying around and I also replaced the 817 opto-coupler with another. Also to 25V and 35V caps were replaced before but the pulse is still there. I realized that the labeling on the picture was wrong (YG901C2 and unmarked component needed to be...
  19. partyanimallighting

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

    Back at it again. I got similar results from 2 of the resistors and it looks like a 22Ω from the readings so to avoid future scorching I should replace it with a 1/2W 22Ω. Am I on the right track here?
  20. partyanimallighting

    Triple output power supply blowing main fuse

    OK. Thanks for the feedback. Case closed anyway. They've been repaired. Thanks again!! To you and all the others.
Top