I have a hopeless paper jam in my HP L7580 and am sure i will have to take it apart. Do you have any instructions, diagrams or exploded views?

If there is such a view, it would be on the manufacturer's web-site: http://support.hp.com
Enter the model-number (L7580) and follow the links to "downloadable documents".

Hi

Im sorry but there is no diagram for this model

Try the instructions on the following page.
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00839319&cc=us&lc=en&dlc=en&product=2512008

Hp paper jam error message is displayed by the printer when paper is jammed in one or more locations. In such a case, users are recommended to remove the jammed paper from the specified location. The entire paper path must be checked for any pieces of paper. To stop the message, open and close the top most cover of the printer. Lastly, verify the flags and the sensors. If the problem persists, the cause of the error message could be a broken sensor or sensor lever.



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Here is the solution, please follow all the steps:

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00839319&cc=us&lc=en&dlc=en&product=2512008

Thank you

TechSaver.

Unplug the printer for about fifteen minutes or so. It will do a hard reset and it will clear the NVRM ram.

Please follow these instructions to clear a paper jam on your printer.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
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give this a try
try this, its probably a small part of jammed paper or then theres a problem with the pickup, try cleaning it.

1. Turn off the printer.
2. Remove any paper trays. Inspect them for wrinkled or damaged paper.
3. Also open the back cover of the printer if this model has one.
4. Open any other doors that give access to the printer's paper path and to the toner or ink cartridge.
5. If necessary, remove the toner or ink cartridge. Place it away from light/ sun light to avoid damaging it.
6. If you find a piece of jammed paper, remove it by holding it with both hands and pulling firmly. The goal is to keep the paper from tearing. If several pieces are jammed together, try pulling out the middle piece first to loosen the jam.
7. If the paper does tear, try rotating the roller gears manually to free the paper. Don't force anything, though. Do this step especially if the jam message comes up repeatedly without any obvious paper jam, there may be a small tear of paper inside.
8. Ones the printer is free of paper Replace the toner or ink cartridge and paper trays, close any doors you opened and turn the printer back on.
9. If the printer paper jam message still appears, then there is still some paper in the printer. Reinspect the paper path.
10. see alternative if the problem is still not solved.
    

alternative :
Load a piece of thick paper, for example photo paper and press the resume button (may be diffrent button on diffrent models) a few times to the printer picks up the paper and puts it through the machine.

Remove back part of the printer. View the printer roller usually in the heater area, if there is still small particles or paper left.

get rid of that hp piece o crust. demand your money back.