Question about Lexmark T640 Laser Printer
Pass thru sensor and flag assembly:
The tray 2 option system board did not detect a piece of paper
actuating the pass thru sensor. Remove any jammed sheets of paper
from the printer and check the pass thru sensor and flag for proper
operation by running the appropriate Tray Sensor Test from the
diagnostics menu. If the test fails, check the sensor for correct
installation and the flag for proper operation. Also check the sensor
cable to make sure it is correctly connected to the option system
board. If incorrect, replace the tray 2 option pass thru sensor
Check these parts for signs of broken or damaged parts,
contamination on the drive rollers or wear plate and wear or damage
to the drive shaft bearings. Check the drive roll assembly and skewed
backup roller for wear, slick spots, material buildup, and oil or grease
on the rollers. Also check for proper operation of the paper aligning
assembly. Repair or replace parts as necessary.
Power takeoff shaft and
spring, bevel gear, feed roll
gear, drive roll assembly,
wear plate, drive shaft
bearings, and skewed
Posted on May 25, 2011
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Posted on Jan 02, 2017
Tips for a great answer:
Jun 20, 2017 | HP Office Equipment & Supplies
What this light sequence means that the printer has a paper jam.
When a paper jam occurs, the printer stops and the operator panel's Paper Jam light and Continue button lights come on. Press and release Continue twice quickly to display the specific secondary error paper jam light sequence.
How to clear Paper Jam
?· Press Continue button twice quickly to see the secondary error code.
To get the secondary error codes
?· When the Error light (!) and Continue button lights are both on, a secondary error has occurred.
?· When the Paper Jam light (4th light) and Continue button lights are both on, a paper jam secondary error has occurred.
?· Press and release Continue button twice quickly to display the secondary error code light sequence.
Press Continue button to resume printing once all the jammed pages are cleared from the paper path.
We recommend that you clear the entire paper path when a paper jam occurs.
To clear a paper jam:
1 If you are feeding paper from a tray, remove the tray, and then remove any jams.
2 Open the front cover and remove the print cartridge assembly.
NOTE: Do not leave the print cartridge assembly exposed to direct light for an Extended period of time. Extended light exposure can cause print quality problems.
3 Remove any jams in the area behind the print cartridge assembly.
4 Lift the flap at the front of the printer and remove any jams beneath the flap.
5 Open the rear exit and remove any jams.
6 After you have cleared the jams, reinstall the print cartridge assembly, make sure all printer covers and trays are closed, and then press Continue button to resume printing.
NOTE: The printer reprints the pages that caused the paper jam.
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