HP Officejet Pro L7780 All-in-One - Multifunction ( color ) - ink-jet - copying (up to): 35 ppm (mono) / 34 ppm (color) - printing (up to): 35 ppm (mono) / 34 ppm (color) - 600 sheets - 33.6 Kbps - Hi-Speed USB, 10/100 Base-TX, 802.11g

Discount Price: $449.99

Customer Reviews:

We fixed that insidious "Clear Paper Jam" error from the rear duplex loader / read for solution. [Posted on 2008-06-27]
We fixed that insidious "Clear Paper Jam" error from the rear duplex loader / read for solution.


This device consistently stretches the text on every duplexed scanned side.
In other words, if you set the scanner to scan both sides of the page, the underside / 2nd part always stretches the text at the top of the 2nd page.

(SEE SUBMITTED PHOTO)

Sometimes, it has just been a single sentence, other times an entire paragraph.

Contacting HP TechSupport is as painful as it is useless. Search their tech support and find out everything else about this thing except what you need to fix.

Searched Google to no avail either.

BUT - the scanning performance speed is superb for an MFD in this price range,,,, too bad it just skews the tops of the even numbered pages.


------ SOLVING THAT "PAPER JAM" ERROR ------
REFER TO THE USER SUBMITTED PHOTO FOR GRAPHICAL NOTES AT THE other HP Officejet Pro L7780 Color All-in-One Printer/Fax/Scanner/Copier (C8192A#ABA)Amazon 7780 Product Page here:


Required Tools:
(2) Medium sized paper clips

Preferable Tools:
(1) Pair of pliers with rubber grips
(1) Edged tool such as wall paper knife, metal pick or toothpick to clean out gear teeth.


This fix applies to paper jams the device believes are in the rear duplexer and often occurs after a real jam that has shredded the paper inside the mechanism.

Despite the fact you've carefully cleaned out all the visible paper from inside with the cover open, paper can jam the gears used to drive the rear rollers and even the tiniest amount of shred prevents operation resulting in the impossible Paper Jam error.

HP Tech Support online and on the phone don't troubleshoot it past "clear the paper from the device than try again please" b.s.

After removing the duplexer, grip any of the four rubber rollers and attempt to rotate in either direction, if they don't move freely with little effort, then continue with these instructions.

Begin:

1. Take the first paper clip and contact the lower two brass rectangles, this fools the device into believing the duplexer is installed, keep the contacts bridged (don't remove your hand or the paper clip until Step 4.) THERE IS NO ELECTROCUTION RISK.
2. Press the "OK" button on the control panel to pretend the paper jam is cleared.
3. CAREFULLY OBSERVE THE pair of white gears on the left, if they seem to clutch, stall, skip or freeze then you have paper shards which are causing the jam.
4. Using a firmer grip or pliers, grip the furthest left rubber roller and rotate in either direction , the gears should rotate with your efforts and look for shards of paper in the gear teeth.
5. Use the paper clip, toothpick or any appropriate edged tool to clear the shards.

Bridge the lower contacts again and observe if the gears rotate freely, if so then you've cleared the insidious jam should be able to print until the next error from this piece of chit printer.

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