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Meanwell RSP-750 power supply repair
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- Опубликовано: 1 авг 2024
- Two defective Meanwell RSP supplies, two different failure modes.
Schematics for RSP-1000 can be found online; very similar except for the external control connector (CN51).
00:00 intro
01:02 first psu problem
04:21 PCB bottom side
05:33 second psu problem
07:22 primary side schematics overview
09:46 : second psu test
Fantastic fix - congrats, and thanks for sharing! Just scored three used 48V models hooked up in either in series or parallel, and they will most likely have issues. I don't have your smarts to find issues so quickly but your video will still help. Would like to parallel them to get more amps so murphy's law says they may be hooked in series(dam that murphy.
FYI I don't remember if the V- terminal is bonded to chassis ground ; if so, they cannot be wired in series. The datasheet doesn't say it can be done, so assume it can't, unless you can thoroughly review the schematics to ensure it can work. For operation in parallel, the RSP series isn't specifically designed for load sharing (some more sophisticated models are), so YMMV. Good luck !
Hi tanx a lot for your good description.i have a question a bout ZTE zxd030 s480.
I have 290volte on Filter capacitors.i have no vcc voltage for 2pcs01.no short dieod on auxiliary supply.i have 12v for vcc ice2a2 and 1.4 v feedback.i don't know why soft start not working.i check isenc is connected to ground.what I should check? Pls help me
Thanks a lot. Please say why there is the capacitor C22 between Line and FG.
What are you powering with these?
very good
How can I download the circuit map of this power supply?
Thank You
Hello , thanks for the movie, do you have your schematic to share or the RSP2000-48 I do work on? Thanks in advance, Luc
Unfortunately not, I only have the RSP1000 schems that I showed in the video.
Hi.
You may know reason to my issue.
Its sdr 480-24v and after supplying 230v i get nil at dc output and i get dc-ok led pulsating as well as clicking relay. What can it be??
i don't know, it's a different PSU. Do visual inspection, look at auxiliary supplies during poweron, etc.
Hello. Can you please tell me the brand and model of your multimeter probes? Thanks
Sure, they are standard Probemaster 8000 series
Do you have circuit diagram of RSP-3000-48 ? I have searched in Google but i did not find
I do not, sorry
Nice video and repair👍🏻
One question… are the fans permanently running or only when switching on the psu?
Are they temperature controlled?
From the datasheet : "built-in fan with fan speed control"; from the RSP-1000 schematics it's modulated directly by the sensed output current, but the fan is always on even with the "REMOTE ON" shorting plug removed.
@@fenugrec5697
Thank you for your quick response!
I received a new one (RSP750-48) today and can now say that it’s true 😕
To me it’s way to loud even with no load connected. Do you have an idea how to reduce fan speed on the controller/ board? I could also change to Noctua
fans which are quieter… 🤷🏼♂️
@@Chris-sc3rf The smaller the fan, the stronger the correlation between "noise" and "airflow"; you can't win. Of course you could tweak the fan control, or re-engineer one like I did for a GPC-3020 ( ruclips.net/video/3FC4myguLyw/видео.html ), but when providing any kind of power, your PSU will generate heat and need sufficient airflow. You might rewire the REMOTE_ON switch to also disable the fan, but that's not great: if you run full tilt and then turn off - lots of residual heat, not good for reliability.
@@fenugrec5697
Yes that’s true. I can’t half the airflow without impacting the cooling. The load I will connect is dynamic with a low duty cycle 30-50% (SSB power amp) so I hope it will work…
I will check with an electronic load if the airflow is sufficient.
What I really don’t like is the fact that the fans are controlled by sensed current and not by the actual system temperature 🙄
The RSP series have built in current sharing and designed to be ganged together.
Indeed. That's why the voltage and current feedback loops are fairly complex.
Hello I need your help. On the RSP-750-24. To wire a simple 2-wire on/off switch on pin13 and 14. Do you by any chance know how to wire a simple 2-wire on of switch for the RSP-1500-24?
That should already be explained in the rsp1500 manual, no ?
Manual is not very clear on this issue. Another thing the manual does not have is how to actually adjust the current. In this situation again, he RSP-750-24 is clear on how to do that adjustment but the 1500 doesn't even mention it. It only shows how to do a voltage adjustment.
@@KeithOlbermannn "Remote ON-OFF is activated by the configuration with respect to CN1,CN2 and CN3 as shown in the following diagram.", page 5... Can't comment on current adjustment, not familiar with that
@@fenugrec5697 come on bro, I read that in the manual. You know as well as i do that that is mumbo jumbo to layman like me. If you understand it, can you put it in layman's terms?
@@KeithOlbermannn There is a wiring diagram showing exactly how to rig a switch for remote on/off. If that is "mumbo jumbo", I don't think I can explain it any better and I don't think I should - sorry to have to say this, but it tells me maybe you are not fully aware of the risks involved in playing with a 1.5kW power supply capable of causing serious damage to you and whatever you're working on. Or maybe you are; I don't know, I'm just some random stranger.
Wish I had your drain to understand these pcb! I been studying them myself for 5 years now and I'm just dumb! Lol.
good teacher, this is a great video,
Can you send the circuit diagram for RSP-1000ABCD-RA.sch? For repair of RSP-1000.
google "rsp-1000 schematics", should be easy to find