Question about HP LaserJet 4 plus Printer
I am using an HP LaserJet 4 Plus Printer and every page I print gets jammed. Sometimes, it's just the last 2 inches and sometimes it gets stuck at the top or middle of the page. If a page gets stuck the last 2 inches, it's not a huge deal if I'm only printing 1 page. If I'm printing more than one page, the first page gets stuck, then the 2nd page gets stuck after it. In order to remove the 2nd page, I have to remove the toner cartridge and remove the sheet underneath it. This is becoming a huge pain and I can't quite seem to figure out how to solve this issue.
Another mystery is that whenever a blank sheet of paper is fed through the printer, it never gets stuck. What about the printing process is causing the paper to stick?
Thanks to the guys at :
2 things to check. First would be the sensor and flag on the fuser. If it is activated, but does not send a signal that it has and the printer will stop thinking there is a jam. The second and the one I lean towards is the registration sensor on the left side below the toner in the cutout on the metal plate. What may be happening is that sensor flag may be sticking in the down position and when the paper passes does not immediately rise and the printer things again it has a jam and stops the paper path. It could also be the sensor itself which is on a board with another sensor attached to the PIU unit.
I have seen the flag stick in the sensor and give the exact problem you are having. This confuses the electronics as to when the paper actually has left the fuser. The stuck flag will signal a paper jam and then when the linkage unsticks it unblocks the sensor and lets the paper go through. So take the top cover off. You should know how to do so from the video. Then actuate the linkage up there manually with your finger and see if it is sticking. I'm pretty sure it is. Then lubricate it with a light oil, preferably silicon or teflon lube. Don't get any on the inside of the optical sensor itself. That is the 2 vertical black plastic posts that the flag moves in and out of.
Posted on May 20, 2009
Please try to check your print cartridge .... change the print cartridge to a new one , it should be the original type designed for the printer.
try also to clean the interior surfaces of the printer... you can use a blowing machine or use a brush to remove all dirt and stacked materials in the printer.
Posted on May 20, 2009
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Posted on Jan 02, 2017
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