Lexmark MB790MFP Service Manual page 167

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7462
Step
18
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.
19
Check the above sensor for proper connection.
Is the above sensor connected properly?
20
Perform a print test and check the pick arm assembly.
Is the media properly picked and advanced out of the media
tray?
21
Perform a print test and check the main motor assembly.
Is the media properly transported and able to reach the
sensor (input)?
22
Perform a print test.
Does the problem remain?
Sensor (input) lingering jam service check.
Use this procedure for the following jams:
• 200.01
• 200.27
• 200.39
• 200.58
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 the fuser unit assembly for obstructions.
Is the above component free of obstructions?
3
Check the fuser unit assembly for excess wear and
damage.
Is the above component free of excess wear and
damage?
2-130
Service Manual
Check
• 200.02
• 200.17
• 200.28
• 200.29
• 200.47
• 200.48
• 200.59
Check
Yes
The sensor is
Go to step 19.
working properly.
Go to step 20.
Replace the
Replace the
Sensor (input).
connection.
Go to
"Sensor
(input) removal"
on page
4-42.
Go to step 21.
Replace the pick
arm assembly. Go
to
"Pick arm
assembly
removal" on
page
Go to step 22.
Replace the main
drive motor
assembly. Go to
"Main drive
motor assembly
removal" on
page
Contact next
Problem solved.
highest level of
tech support.
• 200.18
• 200.19
• 200.37
• 200.38
• 200.49
• 200.57
Yes
Go to step 2.
Replace the
media, or change
the media size
setup.
Remove
Go to step 3.
obstructions.
Go to step 4.
Replace the fuser
unit assembly.
Go to
assembly
removal" on
page
Previous
No
Next
Go Back
4-29.
4-20.
No
"Fuser unit
4-15.

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