The stack stopper on my HP L7680 All-in-One printer came off. How does it go back on?

Hi,
Replacing it is a bit difficult, however here are the steps and link that can help you:
Through this link it will give you step by step instruction with pictures http://h10032.www1.hp.com/ctg/Manual/c00863866.pdf
I hope this can help you resolve the issue.
Note: Make sure that you have acrobat reader install yto your computer.
Thank you for choosing Fixya

Step one: Check the paper in the ADF The condition of the paper or the amount of paper loaded in the ADF might prevent the ADF from picking it up and feeding it through the product.

1. Make sure that no more than 50 sheets of paper are in the ADF input tray.
2. Make sure the original is not photo paper or carbon paper. These types of originals must be loaded on the scanner glass.
3. Make sure the original document that is loaded in the ADF meets the following criteria:
   • Free from curls, folds, creases, and tears
   • Does not have staples or clips attached

Step two: Make sure the ADF pick assembly is in good working condition

1. Remove the document feeder and open the ADF cover.
2. While lifting the blue-green lever, carefully rotate the pick assembly toward the open ADF cover until it stops.
3. Examine the pick assembly.
   • Make sure the bottom roller is held firmly in place by the two-catch, which is located to the left and the right of the roller.
   • Make sure the stack stopper, which is located between the top and bottom rollers, fits within the double slots just above the bottom roller. The stack stopper should move freely within the double slots to flow up and down when the whole pick assembly is lifted and lowered into position.
4. Return the pick assembly to its original position.
5. When the product is turned on, the top roller will reset to its original position above the separator pad. There will be a gap between the separator pad and the top roller.
6. If there is no gap between the ADF top roller and the separator pad, press the Power button to turn off the product.
7. Wait three to five seconds and then press the Power button to turn the product on. The ADF rollers should reset to the correct positions.
8. Close the ADF cover and replace the document feeder.

Step three: Clean the rollers and separator pad

1. Remove the document feeder and open the ADF cover.
2. While lifting the blue-green lever, carefully rotate the pick assembly toward the open ADF cover until it stops.
3. Lightly dampen a clean, lint-free cloth with distilled water, and then squeeze any excess liquid from it.
4. Use the damp cloth to wipe any residue off the rollers and the separator pad. If the residue does not come off using distilled water, use isopropyl (rubbing) alcohol on the cloth instead.
5. Return the pick assembly to its original position.
6. Close the ADF cover and replace the document feeder.

Step four: Detaching and re-attaching the ADF pick roller assembly If the ADF pick assembly is detached or not connected properly, follow the steps below to resolve the issue. If the ADF pick assembly works well, do not perform these steps.

1. Press the Power button to turn off the All-in-One.
2. Remove the document feeder and open the ADF cover.
3. Press the blue-green ADF-release button to release the ADF rollers from the pick assembly as shown in the figure below (the red arrow is pointing to the ADF release button).
4. Re-attach the ADF pick rollers by placing the rollers into the roller slot of the ADF pick assembly as shown in the figure below. The red arrows show the gears on the ADF pick assembly aligned on one side. The yellow arrows point to the two-catch notch.
5. Once the rollers are placed on the two-catch notch, push them in, so that the two-catch clicks into place. The photo below shows a correctly installed ADF pick assembly.
6. Close the ADF assembly and cover.
7. Turn the product on and make a copy with the ADF to check that the pick assembly works.

Step one: Remove any loose paper

Remove all loose paper from the input and output trays.

1. Turn off the product.

2. Unplug the power cord from the back of the product.

3. Push the button on either side of the rear-access panel or the duplexer (two-sided printing accessory) and then remove the panel or duplexer.


4. Find any jammed paper inside the product, grasp it with both hands, and then pull it out of the product, toward you.


5. If the product has a duplexer, push the latch on the top of the duplexer and lower its cover.

6. Carefully remove any jammed paper.

7. Close the cover.

8. Reinsert the rear-access panel or the duplexer into the product.

9. Plug the power cord back into the product.

10. Turn on the product.

Step three: Open the top cover and clear the jam

1. Turn off the product.

2. Unplug the power cord from the back of the product.

3. Open the carriage access door. The carriage moves to the right side of the product.


4. Gently pull the paper out of the rollers.



5. After clearing the jam, close the carriage door.

6. Plug the power cord back into the product.

7. Try printing a document.

· If the issue is resolved, do not continue troubleshooting.

· If the issue continues, proceed to the next step.

Step four: Clear the jam from paper tray 1

1. Remove all paper from the output tray.

2. Turn off the product.

3. Unplug the power cord from the back of the product.

4. Lift the output tray and then check for jammed paper in input tray 1.

Use these steps to remove any jammed paper.

a. Raise the output tray.

b. Grasp the jammed paper and pull it out of the product, toward you.

c. Lower the output tray.

5. Plug the power cord back into the product.

6. Try printing a document.

· If the issue is resolved, do not continue troubleshooting.

· If the issue continues, and if paper tray 2 is not installed on the product, proceed to 'Step six: Clear the jam from the automatic document feeder (ADF).'

· If the issue continues, and if paper tray 2 is installed on the product, proceed to the next step.

Step five: Clear the jam from paper tray 2

1. Remove all paper from the output tray.

2. Turn off the product.

3. Unplug the power cord from the back of the product.

4. Lift the product off tray 2.

5. Remove the jammed paper from the bottom of the product or from tray 2.

6. Reposition the product on top of tray 2.

7. Plug the power cord back into the product.

8. Try printing a document.

· If the issue is resolved, do not continue troubleshooting.

· If the issue continues, proceed to the next step.

Step six: Clear the jam from the automatic document feeder

1. Turn off the product.

2. Unplug the power cord from the back of the product.

3. Remove the ADF input tray and open the ADF cover.

4. Remove the jam cleanout part. With both hands, lift up on the two handles until the part unsnaps. Rotate and lift the cleanout part and then set it aside.

5. Lift the green lever attached to the pick mechanism and then rotate it back until it stays open.

6. Check the ADF paper path for jammed paper.

7. Check for jammed paper where paper enters the ADF paper cleanout.

o If the paper comes out with gentle pulling, proceed to step 9.

o If the paper does not come out with gentle pulling, follow these instructions.

1. Open the ADF, and then use both hands to gently loosen the paper.

2. When the paper is free, gently pull it out.

3. Close the ADF.

8. Lower the green lever.

Reinstall the jam cleanout part. Push down on the two tabs until the part snaps into place.


9. Replace the ADF input tray.

10. Check the following to make sure that the ADF frame and parts are secure and correctly set up.

o Make sure that the ADF frame is secure and attached correctly.

o Make sure that the ADF cleanout part attachment is secure. If it is loose, push down on the two tabs until the part snaps into place.

o Make sure that the ADF pick mechanism is secure. Lift the green lever attached to the pick mechanism and then rotate it back until it stays open.

Make sure that the two-catch is holding the roller mechanism securely in place and that the stack stopper is in the correct position.

1 - Stack stopper

2 - Two-catch

11. Plug the power cord back into the product.

12. Turn on the product.

13. Try printing a document.

· If the issue is resolved, do not continue troubleshooting.

· If the issue continues, proceed to the next step.

If the ADF (auto document feeder) is not picking up paper, you could try the following HP support doc: (copy and paste the link into the location bar of your browser)

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01110425&tmp_task=solveCategory&lc=en&dlc=en&cc=us&lang=en&product=2512009

http://www.precisionroller.com/trays-for-hp-officejet-pro-l7590/details_54680.html for the tray $46

Circuit City has the whole printer for $150.

Try fanning your paper several times. Take that nice neat pile of paper in your hands and wiggle it so that your thumb fans through the edge of the whole stack. Do this on both edges so that the stack of paper is slightly less perfect. You can also gently fold the whole stack slightly in both directions. Do this every time you add fresh paper. It should only take a few seconds.

The full instructions are located here: http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00839319&lc=en&dlc=en&cc=us&lang=en&rule=29041&product=2512009

The section you need is about halfway down the page (Step 6: Clearing the ADF)

Hi,

Yes, you can do this by knocking together the sheets you want to scan into a small, lined-up stack and then put them face up, in the ADF loader.

Bear in mind it can only handle so many sheets at a time (think it's 15?) so don't stuff it with too much or it'll choke.

Remember also that it needs nice straight edges, not dog-eared bits of scrap paper otherwise it'll mis-feed or crumple your source documents.

Oh and you'll need to make sure the software you're using can actually make use of the ADF... The HP provided software can, but it may take a little bit of experimentation to figure out the best, most-appropriate settings.

Hope that helps..

Martin

Loading originals to scan
Use these instructions to load originals into your device for scanning. For the best quality
scans, use the flatbed scanner. See Selecting media for the automatic document feeder
(ADF) for guidelines on choosing original documents for scanning.
Loading originals onto the flatbed scanner
1. Make sure that the automatic document feeder (ADF) input tray is free of media.
2. Lift the flatbed scanner lid.
3. Place the original document face-down on the flatbed scanner with the top, left corner of
the document at the lower-right corner of the glass.
4. Gently close the lid.
5. The document is ready to be scanned.
CAUTION To prevent damaging the device, do not allow the scanner lid to fall onto the flatbed scanner
surface. Always close the scanner lid when the device is not in use.
Loading originals into the automatic document feeder (ADF)
input tray
Note The ADF capacity is up to 50 sheets of 75 g/m2 (20 lb) media (depending on the thickness of
the media), or fewer sheets if the stack fills the ADF.
The minimum size for media in the ADF is 127 by 127 mm (5 by 5 inches). For smaller sizes
use the flatbed scanner. The maximum size for media in the ADF is 215.9 by 381 mm (8.5 by
15 inches).
1. Make sure that the flatbed scanner contains no media.
2. Close the flatbed scanner cover and put the top end of the stack of originals into the ADF
input tray, with the media stack face-up and the first page to be scanned on top of the
stack.
3. Slide the stack into the ADF input tray until it does not move any farther.
If this helps you, let the Boss, FixYa.com Know...

HI,

u can try to Perform a semi-full reset on the all-in-one by following the steps below
1
Take out the cartridges from the unit .
2
Make sure the unit is connected to the wall jack directly without any surge protector.
3
Unplug the power cord from the back of the unit ( without turning off the unit ) .
4
Now press the OK and CANCEL key together , while holding these keys down plug in the power cord back into the unit .
5
Do not release the keys after a few seconds u will find te hp logo or bars moving across the screen .wait while the unit turns off.
6
after one minute turn on the prnter . it will go into alligment phase > let it finish .
7
after its done > try to make a copy .

8 Allow the all-in-one to re-initialize. This may take a minute or two.
9 If prompts appear in the all-in-one display to set the front panel language and country settings, perform the steps to set this information


NOTE - in case this does not worku can try to use the # and 6 button combination.
as well .

Thanks