Fuser Drive Assembly Noise Check - Lexmark C78x Service Manual

HCIT 2000-sheet option does not recognize the size paper selected.
Step Actions and questions
1 Make sure the media loaded in the tray meets
specifications.
Is the media loaded properly and meet specifications?
2 Check the paper tray guide for correct installation.
Is the paper tray guide installed correctly for the
selected media size?
3 Check for correct installation of the media size sensor
cable to the HCIT system board at CN7.
Is the cable installed correctly?
4 Check for a broken, loose, or missing media size
sensor flag spring.
Is a sensor flag spring broken, loose, or missing?
5 Check the media size sensor flag for sticking or broken
parts.
Is the media size sensor flag sticking or broken?
6 Check continuity of the sensor cable.
Do you measure continuity?

Fuser drive assembly noise check

Excessive fuser drive motor assembly noise
Step Actions and questions
1 Excessive noise from the fuser drive motor assembly—
Check for correct installation of the fuser drive
assembly.
Is the fuser drive installed correctly?
2 Install a new fuser assembly. See
removal" on page
Is there still excessive noise from the fuser drive motor
assembly?
"Fuser assembly
4-44.
Yes No
Go to step 2 Load the media
properly, or
inform the
customer that the
media does not
meet
specifications.
Go to step 3 Reinstall the
guide if installed
incorrectly.
Go to step 4 Install the cable
correctly.
Reconnect the Go to step 5
spring if it is
loose. Replace
the spring if
broken or
missing.
Replace the Go to step 6
media size flag.
Replace the Replace the
sensor. If this sensor cable.
does not fix the
problem, replace
the HCIT system
board.
Yes No
Go to step 2 Correctly install
the fuser drive
assembly. See
"Fuser drive
assembly
removal" on
page
Replace the fuser Problem
drive assembly. resolved.
See "Fuser
drive assembly
removal" on
page 4-46.
Diagnostic information
5061
4-46.
2-89