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User manual for power supply/ standard ATX or proprietary
01-08-2019 03:14 AM
I would like to open up my power supply and clean it out. However, I would first like to review the user manual so that I can learn how to discharge the stored electricity or how to stay away from the high voltage. I opened up the computer and I see that the part number for the power supply is 667893-003. I did a web search of that part number but no user manual returned in the results.
Is there a way that I can download the manual from HP?
I know that the parts are sometimes known under a different model number or name, as well (for example, sold to consumers as an individual part), but I wasn't sure how to figure out the alternate part or model number?
On a different note, I noticed that one of the voltages supplied by this power supply is 5.09 V. I think that most ATX power supplies supply 5V, as one of the voltages. Is the power supply best replaced with a specific ATX version? In replacing the power supply, should I instead use one that supplies 5.09V? I read that HP has often used proprietary power supplies like this.

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User manual for power supply/ standard ATX or proprietary
01-08-2019 06:32 AM
First thing to consider - most likely there is not a user manual. Very rarely will a power supply maker/manufacturer give out a manual showing the user how to open or clean a power supply. They are considered a non-serviceable part. In checking the support page for your PC
https://support.hp.com/us-en/document/c04345595
It indicates the power supply to be
- Form factor: Internal ATX
- Total wattage: 300W
- Nominal input voltage range: 200-240V/3A (50-60Hz)
- Dimensions: 150mm x 140mm x 86mm (5.9 x 5.5 x 3.4 inches)
not appearing to be a proprietary power supply
Please click "Accept As Solution" if my help has solved your problem. ----------}
This is a user supported forum. I am a volunteer and I do not work for HP.

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User manual for power supply/ standard ATX or proprietary
01-11-2019 07:56 AM
I suppose the 5.09V rail is still within the 5% tolerance (5V *1.05 = 5.25V), assuming that that power supply is still outputting the 5.09V. I just thought that those tolerances were so that in case the power supply was a little off in what it produced, it would still be reasonably close to the 3.3V, 5.0V, etc. I just didn't think of it as an "invitation" to outright produce different voltages, but more as quality control tolerances. But, maybe the manufacturer was trying to produce a 5V rail, but the voltage ended up being a little off so the manufacturer put an accurate label of 5.09V.

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User manual for power supply/ standard ATX or proprietary
01-11-2019 09:41 AM
I looked at a label for a 667893-003 power supply. I really do not know why they would indicate that voltage but I would not read anything into it as being abnormal. Most other supplies indicate 5v, as you posted.
Please click "Accept As Solution" if my help has solved your problem. ----------}
This is a user supported forum. I am a volunteer and I do not work for HP.