My 5520 printer keeps saying paper jam and the carriage willnot move. I hv unplugged as advised waited and same thing happens

SOURCE: Carriage Jam -- Paper Jam

I have serviced an officejet pro L7580 which was showing a paper jam error when powered on. our customer had had a paper jam and removed the paper . I found small peices of paper in the pick up assy gears. If you remove the rear door, you need to check the 2 small white gears on the left. turn the roller slowly by hand and clear any paper stuck between the teeth. (they may be very small).

after doing this....no more paper jam errors for me!

SOURCE: Printer keeps saying carriage jam

I hate to state the obvious, but maybe your printer has a carriage jam. Fortunately, HP.com publishes a web page that can tell you how to clear the problem:

Carriage Jam Document

Good luck.

SOURCE: carriage jam/officejet G85xi

SolutionStep one: Perform a power reset and connect the printer directly into the electrical outlet Remove all the paper loaded in the main input tray.
Make sure that the product is turned off. 
Disconnect the USB cable from the back of the product.
Disconnect the power cord from the product.
Disconnect the power cord from the electrical outlet and wait 10 seconds.
Reconnect the power cord directly into the electrical outlet and check for the following.
Make sure that the power cord used is the one provided with the product.
If a computer is connected to the product, make sure that the computer is connected to a grounded (three-prong) wall outlet.
Make sure that the power cord is firmly connected to both the product and the power supply.
Reconnect the power cord to the back of the product.
Press the power button ( ) to turn on the product.
Reconnect the USB cable to the back of the product.
If the issue is resolved, proceed to Step six: Print a self-test page.
If the issue continues, proceed to the next step.

for more information please go to below link>>

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01458822&cc=us&lc=en&dlc=en

Thanks for using FixYa.

SOURCE: Carriage Paper Jam in Photosmart hp c6180 all-in-one-printer

Here's what you do. Take a look at the photo below.
Open the cover of the printer, where the ink cartridges are located. Behind the ink cartridges is the carriage, which is a box that moves side-to-side on a pair of rails. It's the thing that sprays the ink onto the paper.

You have to reach in with your hand and slide this thing to the center. Then, look to the very sides, left and right, for any bits of paper. If you look at the second picture, you can see my finger pointing to a small bit of paper that tore of and got jammed into the side. See the little crumpled bit of paper? It's preventing the carriage from sliding all the way to the right. You could have little bits on the right or left side. I had to reach in with needle-nose pliers to grab the paper bits out, but maybe your fingers are small enough.

Once the little bits of paper were out, I was back in business. Good luck!

SOURCE: Error message carriage jam and/or paper jam

Often a carriage jam is caused by a paper jam. If you're getting a carriage jam message and a paper jam message, this video should help.
You-Tube video "wPjahOY5CDo" placeholder