For some reason my printer keeps saying it has a paper jam. It prints fine but apparently the back rollers of the printer do not turn on causing the paper not to come out. What can be causing the rollers in the back not to turn on??
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Re: HP LASERJET 4 PAPER JAM 13
Rollers do not turn on!
Rollers are driven by a motor.
How is the printer telling you this information? (does the PC give an error, or the printer flash lights)
Does the paper make it out of the machine?
Is this "Rollers in the Back" the Fuser Unit?
is The Fuser unit is going bad,
if you open the back top cover, where it gets real hot, where the paper exit's, you should see two rollers, one orange, one either brown or black.. if that orange roller is damaged, has crease's, or covered with black toner, if the paper jams here alott, you probably need a new fuser unit. there is a pm kit available which includes the fuser and rollers, transfer, etc, which this site might have http://www.all-laser.com/cgi-bin/webc.cgi/Menu_HP_maint.html
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if you don't find nothing inside printer and you are SURE there is no paper inside machine try to clean or replace pickup roller, if you wanna be sure about that try to print from Try1, if it work the problem is in try 2
Paper jams can occur in 3 places: Entry, registration and exit.
If the paper isn't picking up out of the paper tray, visually inspect the pickup roller. If it looks shiny, replace it. You should also replace the separation pad as they work together. On the 4L/4P/5P/6P the pickup roller has a plastic shaft that breaks. You'll have to replace the whole pickup assembly. This requires major disassembly of the printer. Check our printer repair kits for your model printer. If you don't see it listed, email us.
If you have an HP 4/4+/5 with an optional 500 sheet feeder that's jamming, check the balance knob adjustment. Center it with a full **** of paper for proper operation.
If the paper is jamming at registration or anywhere between pickup and exit it could be a number of things. Check the paper path for torn bits of paper or label residue. On the II/III series, remove the metal registration guide plate (2 screws) and check underneath it. If the pickup rollers are moderately worn, the paper will stop just short of the registration roller. On the 4L/4P/5P/6P remove the screw holding the oblique roller assembly (Inside front of printer) and pull out and inspect the assembly and the area under it. On the HP 4/4+/5 pivot up the metal plate and check underneath it. Check the roller assembly on the left side for torn scraps of paper (a flashlight or torch is necessary).
Make sure paper cassettes are firmly seated, corner tabs aren't bent. Some trays have lifting springs that could pop out if tray has been dropped.
Check your software settings in the program you are attempting to print from. Do you have the correct paper size specified? If you have a different paper size than what is in the tray, you'll get a paper jam.
Exit jams are frequently caused by exit sensors. These sensors are typically mounted on the fuser assembly or adjacent to it. They are plastic arms that block and unblock an optical sensor. The arms can get stuck or knocked out of place when clearing paper jams. The optical sensors can also get dirt blocking the photo cell. Clean the sensor and check for free movement and proper installation of the sensor arms.
On HP II/III series exit jams are mostly caused by worn gears. The best way to troubleshoot this is to defeat the door interlock (see door interlock photo on troubleshooting page). Press down on the arm on the top right of the fuser. Initiate a test page. While holding down the arm, press one of the metal cartridge detect switches just below the door interlock. Watch the movement of the gears. You will get a 51 error because the door is open. Recycle power to get rid of error. There is an arm gear on the lower right of the fuser that can shed teeth. There is also a 14 tooth gear below the large gear on top of the fuser. You can also manually rotate the large gear and check for binding or crunching. If that happens, then replace the 14 tooth gear. On the door, there are some delivery coupler gears that mate with the fuser and drive the exit roller. Check the gears for excessive wear. Replace if necessary. If the paper gets almost all the way out and jams, replace the exit roller or the exit roller assembly. If the error occurs after fuser replacement, check and see if the connector on the left of the fuser is properly mated with the one in the printer.
On HP 4/4+/5 printers the most common cause of exit jams is the exit assembly. Order our 4/4+/5 Exit Jam Repair Kit. Exit jams in the fuser can be caused by a broken fuser drive gear or a broken gear on the fuser. Remove the fuser and check the gear inside the printer for broken teeth. Manually turn the gears on the fuser and check for smooth operation. Check the paper exit sensor arm for proper mounting and free movement.
Check to make sure the rear door is closed on the printer. Open doors can cause 13 paper jam indications.
On the 5L/6L check the registration sensor arm below the pickup roller. Also check the exit sensor arm (bottom center of the fuser). These arms frequently get stuck or dislodged clearing paper jams. On these printers, if you are experiencing frequent paper jams, order our 5L/6L Multi-Sheet/No Feed Repair Kit
OK, if the printer says jam but no paper inside and prints after you open and close the cover the paper likely never made it out of the tray. Or the machine thinks the page never made it out of the machine.
As far as input check your rollers 1 in the tray and the pick up roller in the machine if you don't have alot of pages on the machine these likely OK.
Next (and this I have found often) check the paper back stop in the tray. This is the guide to set the length of paper. If it is set just a little long the roller cannot catch the edge of the paper. Sometimes the teeth the guide sets in are broken or worn.
The output would be the sensor in the fuser replace fuser.
Hope this helps
HP LaserJet 4, 4m, 4 Plus and 4m Plus Series Printers - False Error Message 13 PAPER JAM
After clearing all jammed paper from the HP LaserJet 4, 4m, 4 Plus, or 4m Plus series printer, the display still reads 13 Paper Jam . Even after cycling the power off and then back on, the error remains.
Open the rear door of the printer. There is a paper sensor near the upper right hand corner of the fusing assembly (just below the right edge of the long yellow warning sticker on the fuser) that can cause paper jam error messages even when there is no jammed paper in the printer. Toggle the thin black plastic lever up and down to make sure it is not stuck or sticky. The lever should be in the down position before closing the back of the printer. If the lever is stuck or missing, the printer will generate a false paper jam message.
Hope it will help you !
If you cant get paper out from inside after removing cartridge then there is No easy fix, and the roller at rear is called a fuser, these parts dont come out easy,machine will need all covers removed, plugs disconnected and brackets removed, gears pulled off and fuser removed, maybe replaced if there is a reason why it wrapped around roller