asked Aug 25, 2011 at 12:42pm
Hp HP LaserJet 4

Where is HP 4+ back door sensor?

I want to fool the HP 4+ back door sensor so I can leave back door open and print card stock without a printer jam message.

Can someone tell me where the little guy is and how to jam it open or closed or whatever? A pic would be be even better if possible.

thanks in advance
If you look at the door, you'll see a piece of plastic sticking out center right (looking from back). If you close the door and watch that piece of plastic, it goes into a slot that actuates the sensor (which is actually on top of the printer). A folded piece of paper stuck gently in there will fool it. Don't push too hard or you'll over center the arm on top and get the sensor stuck. Then you'll have to take the top off to free it. You might also have to tape down the back hinged part of the fuser to do what you're trying to do.
by moe on Aug 25, 2011 at 1:17pm Add comment