Lexmark MS711 - 250;550-Sheet Media Type Error Service Check

Symptom Action
The HCOE detects the rear door as open even when it is closed. Go to “HCOE rear door undetected service check”
on page 319.
250/550-sheet media type error service check
Action Yes No
Step 1
Remove all input options and re-install only the suspected 250/550-sheet
tray option. POR into diagnostics mode and navigate to:
INPUT TRAY TESTS > Feed tests > Tray 2
Does the input option feed normally?
The problem may not
be on this option tray.
Re-install the
remaining input
options one at a time
and test each option
for errors. Proceed
with the appropriate
service check based on
the error message and
the input option being
tested.
Go to step 2.
Step 2
Remove the tray from the drawer and do the following:
• Check the paper guides for damage. Move the paper guide and verify
if it can move freely from one position to another.
• Check the media size finger flag for damage.
• Check the lift plate gear for damage. Manually turn the lift plate gear
and check if it causes the lift plate to move upward.
• Check the separator gears for damage. Manually turn the gear and
check if the gears function properly.
Are the above components ok?
Go to step 3. Replace the media tray.
Go to “250/550-sheet
media tray and drawer
assembly removal” on
page 514.
Step 3
Remove the tray from the drawer and do the following:
• Check the pick roller's position. The pick roller should not hang
vertically; it should lean horizontally underneath the top cover of the
drawer.
• Make sure the pick roller is installed correctly. If not, then re-install
the pick roller.
• Lower down the pick roller and then release. Check if the pick roller
would spring back to its original position.
• Check the pick roller for damage. Check for wear on the pick tires.
Are the above components ok?
Go to step 4. Replace the pick roller.
Go to “Drawer pick
roller removal ” on
page 516.
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Diagnostic information
284