SOURCE: t644 202.03 paperjam
ah, that's easy. you probably have a loose spring in one of the 2 paper jam sensors located in the fuser, or a shred of paper stuck in one of them. take the rear door off, then remove the 2 screws on the rear output cover. 2 tabs hold the top of the rear output assembly to the printer itself. once that is off, you'll be looking at the fuser. there is a jam sensor to the left and one to the right. make sure both flags point up, and that nothing is stuck in the flag itself. one of those 2 sensors is the cause of your 202.03 error. best of luck.
chris
SOURCE: T642 Paper Jam and Check paper stock jamming.
You need to change the paper type when using card stock, plain etc.
As for the paper jams; you need to check the exit sensor at the exit door, also if you have a duplex, 2-3 drawer you also need to check for jams.
SOURCE: paper jam
Probably one of the sensors on the fuser is not working correctly. There are two sensors on the back of the fuser that move when the paper exits the fuser. Remove the back of the printer when the printer says there is a jam and move the sensors to see if the error goes away. If so you may have to replace the fuser unless you can just replace the defective sensor.
Roger
SOURCE: Lexmark T642 display says paper jam check rear
The sensor in the fuser unit is jammed/broken. The fuser will need to be repaired or replaced.
Testimonial: "Thanks for that-I thought I was going mad. I'm not sure about getting it repaired as it may be cheaper to buy a new one."
SOURCE: Lexmark Optra S 1625 202-paper jam open rear door
well with my experience with my opinion crappy lexmark printers there is a senser on the fuser behind the cover it could be jammed down saying there is paper in the fuser when there isnt try lifting it and then flicking it down a few times to work it loose so it springs back all the time and then re-assemble the printer and try it now. hope that works for you had the same problem at work with another model and that is what was wrong with it. good luck
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