Color Laserjet 3600 tray 2 jam

[stevewm]

I have a 3600 that suspect has a faulty paper path sensor somewhere, but I cannot figure out where!

If you turn the printer on with the Tray 2 paper cassette in place, after the printer finishes initializing/Checking the display will show "Clearing Paper Path" and then start feeding paper out, it will feed about 3-4 sheets and then stop with a Jam in Fuser error. If you open the printer up at this point, there is in fact no jams, but a sheet of paper will be sticking half-way through the fuser, another stuck to the transfer belt, and a 3rd coming out of the paper tray feed rollers.

If you turn on the printer without the paper tray in place, it will initialize normally. After loading the paper tray and attempting a print job, it will stop with a "Jam In Tray 2" about 2 seconds after starting the print job. Opening the printer at this point reveals a piece of paper is half-way up the transfer belt with the other half still inside the paper tray. The paper is definitely not getting caught on anything.

When the printer is in a normal ready state, the paper sensors show all 0 except for sensor E, which shows 1.


Please help!

[redcow]

Sensor E is the output bin full sensor (#SR706), but you knew that already.
Run the sensor test again and play with that sensor, make sure that it isn't jammed.
Remember all the sensors feed the DC Controller.

[stevewm]

Hmmm....

I did a sensor check on our other functioning 3600's and it appears that sensor E has become inverted on this printer some how...

When the paper output is in its down (empty) position, the sensor shows 1, when its in the up (full) position, it shows 0! Our other 3600's are completely opposite.

Anyone have an idea how this might have happened? And how to fix?

[MichaelTech]

Check the fuser drive? It could be stalling, or the motor quits.
The ETB could be the culprit also. Cassette drive motor goes bad a lot on these too.
It's a reversing motor as it drives both the MP and Tray 2