Re: Delta DPS-800GB Power Supply No Power
I will have a look and see what the voltage across those caps is tomorrow. you could be right.
Blerog
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Last Activity: 04-13-2021, 03:53 PM
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Re: Maxspect G2 230W LED Power supply
Also worth noting that this unit is manufactured in China, so i am not surprised the caps are fake. Infact, the replacement fets i have here for it look nothing like the ones fitted in the unit either even though they are the same make...Leave a comment:
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Re: Maxspect G2 230W LED Power supply
Well sptted.. I will pull them out shortly and see if any are shorted....Leave a comment:
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Re: Delta DPS-800GB Power Supply No Power
The server that i use for testing is in my lab, it is kept at a constant 21*C and during testing the server is on a workbench alongside a couple of other servers i use for testing, there is about 1ft each side and at the back of the server.
The server Runs perfectly stable with my test power supply. The faulty supplies were tested in the server to identify the problem was as had been reported before any repair attempts were made.
I did not measure the cap's, It is quite possible it is not all of the cap's...Leave a comment:
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Re: Maxspect G2 230W LED Power supply
They are constant current supplies, I believe they are 1000mA output current whereas the ones that have not blown should only be 700mA, though finding any real information on this unit is proving difficult....Leave a comment:
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Maxspect G2 230W LED Power supply
Hi,
I have a power supply box here from a fish tank LED light unit that i offered to take a look at for a friend, or rather he handed it to me with some new components that the "guy in maplins said would fix it right up".
Two of the four channels have gone down in the power supply section.
The power supply is made up of 4 constant current supplies and a controller board with its own power supply.
I have started cleaning up one of the blown supplies but i am a little stuck, it appears that a lot of the primary side has gone up in smoke (gues... -
Re: Delta DPS-800GB Power Supply No Power
Hey,
The capacitors were replaced with rubycon's of the same value, cant remember what series off the top of my head though. This fixes the supplies that were experiencing "unexpected shutdowns". It is strange though, the ones with the bad caps on the outputs do not use ltec startup cap, they have rubycon's in this position. I guess you are right about the diode aswell, though i have yet to find one where this is faulty.
OwenLeave a comment:
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Re: Delta DPS-800GB Power Supply No Power
Quick update.
the power supplies i was still having problems with all have united chemicon KZE and / or KZH caps on the output and these were bad, all supplies perfectly stable after swapping these out. They were not bulged, except 1 that was slightly bulged on the bottom which is what tipped me off that it may be the problem. Normally i only see the KZG's failing but i guess i will just start ripping all UC caps out in future.Last edited by Blerog; 01-10-2013, 03:24 AM.Leave a comment:
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Re: Delta DPS-800GB Power Supply No Power
I have just had a look at one of the supplies that is still unstable. powered it up on the bench and 5VSB, 3.3V, 12V are all spot on. -12V is only showing -10.29V though. Time to head home now for the weekend but this supply was making the server unstable, it was restarting itself every hour or so when i tested it after the swollen cap was replaced.
Cheers,
OwenLeave a comment:
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Re: Delta DPS-800GB Power Supply No Power
Hi,
I have close to 200 faulty supplies here, Tested in a server some of them are showing intermittant shutdowns as the fault and some of them are showing no power LED and flashing internal and external health lights on the server.
My test server is 100% stable with my known good test supply fitted. It is possible that the Diode just looks like it has been replaced, the strange thing is it would appear that the ones that have been repaired in the past by HP have a slightly different Diode fitted (looks...Leave a comment:
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Re: Delta DPS-800GB Power Supply No Power
Unfortunatley in my experience the 379124-001 is just as unreliable as the older models.
I have a few of these power supplies here that are causing random unexpected shutdowns even after the two caps are swapped out. Any ideas? EDIT: Just to clarify, I mean on the older model, they are afterall quite different. Some of them have been in to HP for repair in the past and it would appear that they have swapped out the Surface mount diode underneath the Ltec cap at the same time as the cap. Could the faulty cap be killing the diode...Last edited by Blerog; 12-28-2012, 03:50 AM.Leave a comment:
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