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Search: Posts Made By: Shinjinkun
Forum: Troubleshooting Power Supplies and Power Supply Design 07-12-2022, 03:17 PM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

Where should I make the measures? I attached the pictures of the pcb after removing the transformer to point it out.
Forum: Troubleshooting Power Supplies and Power Supply Design 07-12-2022, 01:04 PM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

Yes, that's what I thought. I thought maybe the transformer was responsible for the short, but it doesn't look like it.

I haven't connected the PCB after removing the transformer, as I wasn't sure...
Forum: Troubleshooting Power Supplies and Power Supply Design 07-11-2022, 01:27 PM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

Ok, forget about the previous message.
Adding some extra solder, and moving the iron left and right, I was able to pull the transformer bit by bit, and finally removed it.
I attached the pictures...
Forum: Troubleshooting Power Supplies and Power Supply Design 07-11-2022, 10:39 AM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

Yes, I have seen those vacuum desoldering irons before, but the cheapo ones doesn't look much better than the manual I have. The ones with electric pump, obviously better, are also fairly more...
Forum: Troubleshooting Power Supplies and Power Supply Design 07-04-2022, 05:01 PM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

Guys, I tried removing the transformer, but somehow, I can't get all the solder out of the holes, and when I try to remove it, is still pretty hard to move. Do you have any tips to take it off? I...
Forum: Troubleshooting Power Supplies and Power Supply Design 07-03-2022, 12:03 PM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

Hi guys! Sorry, I was off-line waiting for the devices I ordered.
Finally, I received a component tester, and also an oscilloscope (probably it will be helpful for the repair?). It is the model...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-20-2022, 04:40 PM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

Wow, that's a lot of info. Give me some time to digest this, please.
I just received the components kit I ordered a few days ago. I will see if I can try to replicate some of these example...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-17-2022, 12:51 PM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

In order to build the circuit, can you recommend a starter kit with base components to do all these, please? I have been checking some arduino starter kits, but it seems that the breadboard that...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-16-2022, 05:36 PM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

Oh, I will try that. I think I am going to need a a starter kit of components, or disassemble a broken UPS I have in the garage. One question, if I removed the transformer, could I also reconnect the...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-16-2022, 07:30 AM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

Ok, I have been reading some info, and understand that those component testers are meant to check which type of components they are and their values. However, even if I were to check the transformer...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-14-2022, 08:04 AM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

No, I am not sure about how to measure the transformer... I checked the link you provided, but I am not sure about what to do with this... Am I supposed to buy these components? Or is is something...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-12-2022, 05:03 AM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

But is there a way to check that this is happening? I mean, I only have like 5 or 6 vipers left... I won't like to completely waste them if I can avoid it...
How can I isolate the hot area to...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-11-2022, 05:07 AM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

I replaced the components, included the viper, and connected everything again. However, I am back to step one, the short is present and I cannot get a way to find which component is causing it.
...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-29-2022, 12:05 PM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

I am using this flux: https://www.jbctools.com/fl-15-flux-in-bottle-15-ml-product-150.html

Not sure if it has acid or whatnot.
Forum: Troubleshooting Power Supplies and Power Supply Design 05-29-2022, 11:10 AM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

Well, that must be the current issue, indeed.


I removed the bridge rectifier and, when I connected everything to mains, the light bulb was off. Then measured the voltage. This time, I was...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-24-2022, 01:04 PM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

Sorry it took me some time to make the proper tests.

Well, I finally connected the lamp and, as expected, is continuously bright. At least, this way, is not burning the components again.

As I...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-19-2022, 03:28 PM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

Hi guys!

I replaced all the components again just to be sure. When I removed the 550Ω, I checked it and it was in short, so I replaced it.

Regarding the lamp holder, I attached the contacts to...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-16-2022, 04:32 PM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

Yes, I will use the incandescent lamp first, as it will take several days or weeks to get the fuse replacement. Problems of living in a small village. I will order the replacement as soon as...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-16-2022, 12:32 PM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

I removed the fuse from the board, but it doesn't clarify much. Attached some pictures for you to see.

The markings on the fuse are like this:

RSFR-H on the self-shrinking tube.

2A 250V | in...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-15-2022, 05:17 PM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

Perfect. I will get a lamp holder tomorrow. I remember I have one in the garage.




Alrighty. I hope the fuse has some print on it. Otherwise, is going to be difficult to pick the fuse.


...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-15-2022, 06:43 AM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

Ohh, I heard about the light bulb thing before, but I am not sure how to do it.
So, if I understand correctly, I will need a lamp holder (or bulb socket, not sure the correct name) with two cables....
Forum: Troubleshooting Power Supplies and Power Supply Design 05-14-2022, 06:58 PM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

Done! I checked with the multimeter in continuity, and is showing OL, and it is not beeping. That means it doesn't have continuity, right?
Forum: Troubleshooting Power Supplies and Power Supply Design 05-14-2022, 06:10 PM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

Alright, I checked the values for the BD1 component:
input AC: 0.310V
output DC: 0.403V

I also checked the cable that comes from the input AC cable (after the fuse) to see if the current was...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-14-2022, 03:18 PM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

I took the measures for the three capacitors. These are the values I obtained:

C3 - 400V 10uF ---> 0.403V
C14 - 50V 47uF ---> 0.184V
C17 - 25V 470uF ---> 0.939V

I haven't replaced the...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-14-2022, 10:41 AM
Replies: 64
Views: 3,649
Posted By Shinjinkun
Re: Cyberpower CP900EPFCLCD - F03 Error

I will try replacing it.
Showing results 1 to 25 of 35

 
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