Lexmark MB790MFP Service Manual page 170

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Step
1
Check the media path for partially fed or jammed media.
Is the media path free from partially fed or jammed media?
2
Check the sensor (input) for proper operation.
1. Enter the diagnostic mode
2. Select Base sensor test
3. Observe the line item "input"
Does the display on the operator panel, change every time
the sensing area of the above sensor is interrupted or
blocked.
3
Check the above sensor for proper connection.
Is the above sensor connected properly?
4
Perform a print test.
Does the problem remain?
Sensor (fuser output) late jam service check.
Use this procedure for the following jams:
• 201.02
• 201.52
Step
1
Check the media size setup and tray guides for all media
trays.
Does the media size, in use, match the size set for all media
trays?
2
Check all the media trays for proper media installation.
Is the media properly installed in all the media trays?
3
Check the fuser unit assembly for damage and life
expiration.
Is the above component damaged or has it exceeded life?
4
Check the fuser unit assembly for obstructions.
Is the above component free from obstructions?
5
Check the sensor (fuser output) for proper operation.
1. Enter the diagnostic mode
2. Select Base sensor tests
3. Observe the line item "output"
Does the display on the operator panel, change every time
the sensing area of the above sensor is interrupted or
blocked.
Check
• 201.07
• 201.27
• 201.57
• 201.75
Check
Yes
Go to step 2.
Remove any pre-
staged or jammed
media.
Go to step 4.
Go to step 3.
Replace the
Replace the
Sensor (input).
connection.
Go to
"Sensor
(input) removal"
on page
4-42.
Contact next
Problem solved.
highest level of
tech support.
• 201.32
• 201.50
• 201.77
• 201.82
Yes
Go to step 2.
Replace the
media, or change
the media size
setup.
Go to step 3.
Remove and
properly re-install
the media.
Replace the fuser
Go to step 4.
unit assembly.
Go to
"Fuser unit
assembly
removal" on
page
4-15.
Go to step 5.
Remove
obstructions.
Go to step 7.
Go to step 6.
Diagnostic information
7462
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