Thermistor 1 Error; Thermistor 2 Error - Lexmark X925 Service Manual

7541-03x

121.01 Thermistor 1 error

Step Action and questions
1 Is the fuser properly installed? Make sure that it is
properly seated.
2 Is the fuser cable properly connected to CN19 on the
printhead controller board?
3 Check the fuser cable for continuity. Is there
continuity?
4 Replace the printhead controller board. Does this fix
the problem?
5 Replace the fuser. Does this fix the problem

121.02 Thermistor 2 error

Step Action and questions
1 Is the fuser properly installed? Make sure that it is
properly seated.
2 Is the fuser cable properly connected to CN19 on the
printhead controller board?
3
Check the fuser cable for continuity. Is there
continuity?
4 Replace the printhead controller board. Does this fix
the problem?
5 Replace the fuser. Does this fix the problem
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Service Manual
Note: If the error is 121.05., the fuser is at the end of life.
Note: If the error is 121.05., the fuser is at the end of life.
Yes No
Go to step 2. Reinstall the
fuser.
Go to step 3. Properly connect
the connector.
Problem solved Replace the fuser
cable.
Problem solved Go to step 5.
Problem solved Contact second
level support.
Yes No
Go to step 2. Reinstall the
fuser.
Go to step 3. Properly connect
the connector.
Problem solved Replace the fuser
cable.
Problem solved Go to step 5.
Problem solved Contact second
level support.