Question about HP (194989-001) (194989001) Power Supply

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Pin connection of power supply HP P/N 194989-001

I need to use this power supply for other application but I d'nt know how
connect the pin to power on the output (I need +12 volt on).
Tank you for help.
Salvo

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mine was do- the same. pin 2 is next to the dim slots its white. i con-ed a 12 fan to it. the fan dont spin i dont get the mess any more i am look for the book to get the jumper set- as well. so i can take the fan off. small 12 v fan

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SOURCE: HP zd8000 laptop power supply

I found the solution - and implemented it, it works. The blue (ID) line needs to show 7.5v. The simple way to acheive this is to simply put a 47k resistor from the +19.5v line to the ID line. Apparently there is a pull down at the computer end that means it ends up at 7.5v.

I cut the cable about 6" from the old HP power supply. I then soldered a female power socket onto the loose cable and soldered the 47k resistor between the ID line and the +19.5 line. I then plugged this onto my two pin power supply and the plugged it into my computer. It works very nicely.

Not wishing to junk the HP power supply unecessarily - it was still producing the 19.5v - I then soldered a power plug onto that ignoring the ID line. That now works as well. It seems that the circuitry that provided the 7.5v ID voltage in the HP power supply became flakey. I could have just opened up the power supply (I have already done that) and disconnected the blue line from the circuit board and just tied it to the +ve line via the 47k resistor and then wrapped it with the usual insulating tape.

Posted on Apr 03, 2009

heavymetal77
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SOURCE: Want to use the atx-300-12z as a hobby power supply. Need 12vdc.

You're asking for a fire or just burning out the power supply. But,at your own peril, check the yellow wires for 12v or buy a power supply test adapter from ebay. It bypasses the power switch usually done by the motherboard & will fire up the power supply like it was connected to a board. Then test the wires for 12v. Should be any yellow wire,red is 5v. Green is 3.3 or 3v.

Posted on Jul 22, 2009

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SOURCE: POWER SUPPLY 24 pin slim line colour code ,hp compaq dc 7100

normal white wire....?
white with red....?
brown....?

Posted on Aug 28, 2009

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SOURCE: 920-fan command 2 pin connector from power supply not connected

then connect the fan to a 2-pin connecter if you cant do it take it to a computer place to do it for you

Posted on Sep 24, 2009

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You really should take that Power Supply, and use it on grandma's computer.

The 8-pin EPS +12 Volt power cable was brought out, to provide more power To the motherboard AND processor.

http://www.playtool.com/pages/psuconnectors/connectors.html#eps8

The 4-pin ATX +12 Volt power cable has TWO yellow wires.
Yellow wires are 12 Volt wires. (And two Black ground wires)

http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4

The 8-pin EPS +12 Volt power cable has FOUR 12 Volt wires.

In the motherboard manual, does it say, "Yes Tom. Go ahead and use a 4-pin ATX +12 Volt power cable. We don't care. We just use an 8-pin EPS for fun."

[ This is an 8-pin PCI Express power cable. Completely different,

http://www.playtool.com/pages/psuconnectors/connectors.html#pciexpress8 ]

The motherboard probably uses 150 Watts by itself.
No Ram Memory, no CPU, no fans, etc.

The CPU could use up to 125 Watts of power. Just depends on what AMD, socket AM3, processor you are using.

Now to graphics card's power;
The most Wattage a PCI-Express x16 slot can deliver is 75 Watts.

The most power a 6-pin PCI Express power cable can deliver is 75 Watts.
8-pin EPS +12 Volt power cable? 150 Watts.

When buying a Power Supply you should calculate all components needing power,

http://extreme.outervision.com/psucalculatorlite.jsp

,then buy a Power Supply that has AT LEAST 10 percent more power than needed. Easier on the Power Supply.
Also a computer will NOT use more power than it needs.

10,000 Watt power supply, (Exaggeration ), and the computer only needs about 100 Watts for surfing the internet?

Computer ONLY uses 100 Watts.

Due to the price, the above, and the availability, you should use a 500 Watt power supply at least.

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=899123&CatId=1079

http://www.amazon.com/StarTech-6in-Pin-Power-Adapter/dp/B002O21XHQ

Or use it on yours if it has enough Wattage.

Back in the day, the motherboard didn't need to supply that much power to components on it.
More powerful Processors, Ram Memory, and graphics cards, brought the power needed, up.

A 4-pin ATX +12 Volt power cable was added for the motherboard. Then 6-pin PCI Express power cable for graphics cards. Then the 8-pin PCI Express power cable for graphics cards. Lastly the 8-pin EPS +12 Volt power cable.

(Better make sure the Power Supply you have is good, if you wish to use the above power adapter cable. Nothing like having a Power Supply with a weak voltage power rail, and a new build, to pull your hair out on )

http://www.gigabyte.com/products/product-page.aspx?pid=3894#ov


Out of the motherboard manual Page 23,

"With the use of the power connector, the power supply can supply enough stable power to all the components on the motherboard. Before connecting the power connector, first make sure the power supply is turned off and all devices are properly installed. The power connector possesses a foolproof design.

Connect the power supply cable to the power connector in the correct orientation. The 12V power connector mainly supplies power to the CPU. If the 12V power connector is not connected, the computer will not start.

To meet expansion requirements, it is recommended that a power supply that can withstand high power consumption be used (500W or greater). If a power supply is used that does not provide the required power, the result can lead to an unstable or unbootable system."

For additional questions please post in a Comment.

Regards,
joecoolvette

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