Need Help to modify a HP PS

[volcanooo]

Hi All
I am new in this forum, and this is my first post.
please I need help.

My power supply model : PS-6241-4HP is damaged.
and I do not found this model.
Now I want to modify a standard power supply.
my problem is just in +12Vcpu and +5.08Vaux. ( what mean this voltages, and must I use +5.08Vaux).
So, please help me to modify a standar power supply .

thanks

 

[Harvey]

Assuming the PSU in your machine is the standard ATX format, almost any PSU with a similar or higher power rating should work and fit in easily. You want a unit that can provide the same or more current (in A or Amperes) at each voltage.

HP and most other builders of prebuilt machines typically included underpowered PSU's that will light up the system but fall short if you try to add any power hungry extras, such as a gaming video card.

Do make sure that the unit you buy provides all the kinds of connectors your motherboard requires, including a 4 pin or 6 pin ATX connector for the CPU, enough SATA connectors and the ability to connect to your motherboard which may have a 20 or 24 pin power connector.

Don't worry about 5.-8 volts vs. 5.00 volts. That's only 1.6% difference, and most sytems will tolerate a +/- 5% deviation from a nominal value.

If you want to be sure, give us the HP model number, or check the specs on HP's site.

Hope that helps.

 

[volcanooo]

Hi Harvey
thank you for your reply.

Can I use any +5V in place of +5Vaux ? ( of course respect ampérage 3A ).


thanks

 

[Harvey]

I found several HP p/n 437352-001 on eBay. The pic is strange in that it isn't a plain rectangular shape.

If that is what you have, it looks like it's upside down. That is, the surface that would be on top in the case is on the bottom in the pic.

I found another listing on Sears.com that shows this more conventionally packaged PSU.

Its rated at 240 watt, and it has SATA connectors, a 24 pin main power connector, a 4 pin connector for the CPU power, the conventional Molex 4 pin aux power connectors and others.

If looks like the first pic, and I'm right about the way it mounts, any ATX PSU in a conventional rectangular case (second pic) should work. Check to see if any components would get in the way of the space not used in this unit. Mounting the supply is easy. It's just four screws on the back of the case.

Because I'm a forum Admin, I know you're not posting from the U.S. so I don't know what's available in your country. For reference, here's a link to many supplies between 300 - 380 watts starting at around $14 U.S on Newegg.com. Check the specs for those that interest you that have all the connections you need.

Another feature that may interest you is the efficiency of the PSU. Those rated 80+ are certified to be 80% efficient in converting power from the wall to the voltages and currents at the outputs. They will waste less power as heat and save something on your power bill. You may also want to check for acoustic noise ratings if they are given.

Check with a local tech to be sure I'm right about what will fit and work in your machine and especially, which makes and models available in your area are of decent quality and reliability, and check that the models you're interested in will work with your local AC wall voltage. If relative prices in your area are anything like they are, here, it is probably much cheaper and easier to buy a new unit than to try to repair your current one.

Good luck.

 

[volcanooo]

Hi Harvey and all

the most products of ebay.com does not shipping to algeria or shipping is more expensive.
So.. I can modify any power supply . my problem is just in the voltage +5Vaux, I do not know what is the role of this voltage ( my question is if I can use any voltage +5v in place of +5Vaux, because the most PS have not the voltage +5Vaux, only it have +5v)

thanks

 

[Harvey]

"Aux" is not an electrical specification. Look closely at the specified voltages on your power supply. It specifies several different voltages at different current ratings, including two regulated 5 volt outputs. One is labled 5.08V SYS at 17 Amperes, intended to supply the main system. The other is labled 5.08V AUX at 3 Amperes, intended as an auxiliary supply.

The system is designed to assign the various supplies to the different types of connectors which, in turn, determines which kinds of devices can be connected to each of the supplies in the system.

The limit on how much power (how many volts at a given number of amps) the PSU can deliver depends on the number of watts the power transformer can supply from the mains and the efficiency of the regulator circuits. You can't change any of these without completely redesigning it.

The bottom line is, you can replace failed and defective parts IF you are sufficiently skilled in electronics to know which parts are bad and IF you can determine what caused the failure and fix it. Beyond that, there is no "modification" you can do to this or any other packaged PSU to improve or alter its performance without upgrading a lot of other components.

What you want is an ATX PSU that supplies AT LEAST the specified current (the number of amps) at each of the specified voltages. More current is a bonus, not a problem. The system will use only as many Amperes as it requires at any given moment at each specified voltage.

The spec for most voltage rails in an ATX supply is +/- 5%. For a 5 volt supply, that means any voltage between 4.75 volts - 5.25 volts is within spec. 5.08 volts is 1.6% above 5.0 volts so forget about "5.08 volts." Call it 5 volts, and be done with it.

I have no idea which makes and models of PSU's are availabile in Algeria, but even if you're an advanced electrical engineer, if you can't repair it quickly and cheaply, your best bet is to recycle it and buy a new one, preferably one with a higher power rating than 240 watts.

Finally, repeating my previous suggestion, check with your more computer savvy friends and/or local techs for info about the reliability of the makes and models available in Algeria.

 

[volcanooo]

thank you very much Harvey

I will work with your advices