Re: usp440m-42lp psu
Nothing from any of them. So probably need to pull off diodes and check em !!
-
Re: usp440m-42lp psu
check the measurements in the picture
the yellow part creates the 5V standby voltagesAttached FilesLeave a comment:
-
-
-
Re: usp440m-42lp psu
Go right to the connector where it says 5VSB (CN801). Measuring DC you should have 5V.
Then connect a 1k resistor from 5VSB to RL_ON. The relay should come on and you should get 9V, 24V and 12V.
Then connect a 1k resistor from 5VSB to VS_ON. You should get about 190V VS and 60V VA. All DC.Leave a comment:
-
Re: usp440m-42lp psu
37VAC is not enough, must be the same voltage as input AC voltage.Leave a comment:
-
Re: usp440m-42lp psu
Right ok test out put again and got 263v Ac atleast I have a reading this time lolLeave a comment:
-
Re: usp440m-42lp psu
ok so i have changed filter no joy, i must have tested something wrong somewhere or has blown old filter and something else. i have not had chance to test it properly yet. i did test the rocker switch and it tested ok but on closer inspection it looks a bit melted.
when i plug the power cord in i can hear what sounds like a relay click from the area pictured and shorting sound if i can use that termAttached FilesLast edited by joehezzer; 03-28-2014, 03:04 PM.Leave a comment:
-
-
Re: usp440m-42lp psu
fingers crossed there is no other damage. the chap said he had a sparky round his house the week b4 sorting his house electrics out, then a week later he had a power cut because of the weather and the set never turned back on, fingers crossed there is no other damage
Leave a comment:
-
-
-
-
Re: usp440m-42lp psu
How did this work out for you? Was it the Filter?Leave a comment:
-
Hi guys
I need one of these MP2329CGG for a repair job. It's a 24V 6.5A buck converter. But I have not been able to find a supplier who has that component.
Actually I would buy a few as I always think if I found one faulty already I will probably find more in the future
I had one supplier on Aliexpress who gave me a price $2 each, but I have been waiting some days since I asked for shipping price and they don't reply
Does anyone know where I can buy that part in small quantity (let's say 5 of them), or any equivalent I could use? it supplies the Standby... -
Hello, although I've never been formally taught soldering techniques, etc... I've not really run into too much trouble soldering, with the exception of this job...
I've got a supposed blown transistor on my fuel pump on my car and I'm trying to replace it. It's a gel encased circuit booard with very fine connections. Please see photo uploaded.
I've cleaned up the area that I'm working on with alcohol scraped off the wires, etc..
I cannot get any solder to now stick any of the connections, I've used various grades of solder and flux combination, nothing... -
Hello,
About a year ago, I was struggling to find schematics whenever I needed them. As a programmer, I saw an opportunity and wrote a few scripts to automatically gather a large database of them. Today, I've decided to share it with everyone, because good things should be accessible to all.
What's included? Over 14,000 laptop schematics, as well as some BIOS files, and about 1,000 phone schematics.
Everything is compressed in a RAR format and is over 140 GB. (Since it's such a large file, your browser might show a warning.)
I plan to host the...08-20-2025, 09:58 AM -
Hi All,
Currently struggling with this bios and EC Problem and hope someone with more knowledge might be able to help, so my laptop PC Specialist Ionico 17 ( Tongfang GM7TGxP / 11800h rtx 3070 ) had lower than normal resistance on the PCH, so before i changed the pch i attempted to flash a bios/ec from same type of laptop board ( i am not the original owner and PC Specialist would not help ) which did flash ok but no change, after that i changed the chip and all resistance readings from all rails were normal, so i turned the laptop on with the new PCH and it turned on as soon as i... -
Struggling to identify this component.
I thought it might be an Linear Regulator but the pins in the circuit don’t seem to correspond
Many thanks
Leave a comment: