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
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have the machine perform a paper path test with just 1 copy to see if this jams then have it path test 5 prints to see when it jams- if its only jamming when more than one sheet is being printed then the fault lies with the paper pick up ( you may notice a longer delay for first print)
the machine will attemp to feed three times before failing as a jam
if the machine is printing more than one sheet then the jam appears just before the tail end of the first print exits the fuser (fixing Unit).
clean or replace the feed rollers.
if the jam happens on every print and the code is 13:02/3
then paper pass sensor arm 2 has stuck (look on you tube to resolve this search for lj4200 13:02 jam)
hope this helps- if you are still unable to get the machine working and your willing to pay then I would suggest Belmonte Buisiness machines
are a good company to deal with they are on 0161 480 5556 and can call out anywhere in the UK
Error 13 is a printer error code that signifies that there is a paper jam. You need to check the
jam in the entry if your system shows this error. Error 13 also
indicates the need to replace the pickup roller in the printer.
13.XX error msg almost always refers to a paper jam.
Paper jam can be an actual paper jam, can be a sensor that is broke or stuck in the wrong position,
Could also be a false paper jam. Printer tries to feed paper, paper never feeds, causing the paper path sensor to say "hey, that sheet of paper never reached me, so it must have jammed somewhere.
Check the paper path for a paper or piece of paper.
Try looking for the jam from the rear of the printer. Also, using one of those compressed air cans, blow all the paper dust our of your printer, because the sensors usually are photo-electronic sensors, and paper dust wil register a paper jam, even when no paper is in the printer.
Here is what HP has on the subject of the triangle light flashing: 1 - Attention Light2 - Ready Light3 - Go LightFigure 2: Printer light key1 - Symbol for light off2 - Symbol for light on3 - Symbol for light blinking Door open, media out, no print
cartridge, or media jam
The printer is in an error state that
requires operator intervention or help.
Check the following:
The print cartridge door is completely
Media is loaded.
The print cartridge is correctly installed in
There is no media jam.
Figure 8: Paper jam13.JJ.NT JAM IN TRAY 1
13.JJ.NT JAM IN TRAY X
The Attention LED is blinking.
Check paper loading then open and close top cover.
When there is a jam in tray 1, verify the paper is loaded correctly, open and close the top cover. Pressing GO is ignored.
When there is a jam in tray X, verify the paper is loaded correctly, open and close the top cover. Pressing GO is ignored.
These are the error explanations for just the flashing triangle light, there are many more, but none for just the flashing triangle.
If the light pattern is different let me know (other lights on as well) -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 !