Lexmark T640 Service Manual page 143

The printer does not recognize one or more output options as installed
Service tip: If more than a single output option is installed, check each one to see if the printer recognizes any
single option as installed. If the printer recognizes any of the output options, the base printer autoconnect
system is operating correctly. The problem is in the unrecognized option. Continue with this service check or go
to the service check for the failing output option.
FRU
1 High-capacity stacker
feeder
2 High-capacity output
stacker/mechanical linkage
assembly
202.xx Paper Jam Open Rear Door
pass thru sensor flag or
feeds out to the standard bin even though bin x is selected and paper exits half way
out of the redrive assembly
Service tip: For this type of problem check the
isolate the problem. A 202 paper jam message can also occur prior to the high-capacity output stacker pass thru
sensors.
FRU
1 Lower Pass Thru Sensor/
Flag Assembly
Remove Paper - Output Bin x Full
FRU
1 Dual output bin sensor flag
(upper assembly)
Action
Check the autoconnects, cables, and connectors of the option for any
signs of loose or damaged parts.
Remove the left and right side covers and check all four
autoconnects for damage, especially the connector pins. Remove the
output option and check the voltages on the standard output bin
autoconnect located on the top left rear of the printer. Go to
"Autoconnect" on page
output option and note the positions of the toroids on the autoconnect
cables on the upper and lower assemblies, and check the voltages on
the autoconnects. If all voltages are correct and the lower assembly
is failing, replace the lower control board. Otherwise, replace the
High-capacity output stacker option.
displays and a sheet of paper is jammed prior to the
202.xx Paper Jam Open Rear Door
"Base printer sub error codes" on page
Action
Check the flag for correct operation, binding, broken parts, or
interference from the sensor cable. If incorrect, repair as necessary.
If correct, check to make sure the lower pass thru sensor is correctly
connected to J3 on the lower control board. Disconnect the pass thru
sensor cable and check the voltage at J3-3. The voltage measures
approximately +5 V dc. If incorrect, check the voltage at J3-2. The
voltage measures approximately 0 V dc. If incorrect, replace the
sensor assembly. If this does not fix the problem, replace the high-
capacity output stacker option.
displays; you may not be able to clear the message
Action
Check the flag for correct operation, binding, broken parts, or
interference from the sensor cable. If incorrect, repair as necessary.
5-7. If the voltages are correct, reinstall the
displays, a sheet of paper
2-9. They can help
Diagnostic information
4061-xx0
2-101