Lexmark MS510 and MS610 Error Code 121.08 Fuser under Temp

 

Repair Advice for the Lexmark MS510 and MS610 Error Code 121.08 Fuser

When you are in the middle of printing a print job and the machine reads a low temperature reading in the fusing unit then you might  get the  Lexmark MS510 and MS610 Error Code 121.08. This could be an accidental one time error or it can be a fatal error requiring immediate attention. Below you will learn what the service manual has to say on the subject and a few of my personal tips. At the bottom of the page you will find a link to the fuser replacement instructions if that is what you decide your next course of action will be.

Lexmark MS510 and MS610 Fuser, 110-120V – 200000 Page – 110 V AC

Lexmark MS510 and MS610 Error Code 121.08 Description
Fuser was under temp when page was in fuser.

Lexmark MS510 and MS610 Error Code 121.08

-Lexmark MS510 and MS610 Service Manual Repair Advice for the Error Code 121.08
1 Restore the engine settings to their defaults:
Diagnostics Menu > Printer Setup > Defaults
2 Restore the EP setup settings to their defaults:
Diagnostics Menu > EP Setup > Defaults
3. Check the fuser cables JTHERM1 and JEXIT for proper connection to  the controller board.
4. Check the cable PCN5 for proper connection to the power supply.
a. Turn off the printer.
b. Remove the rear door and cover.
c. Disconnect the fuser cable connected to PCN5 of the power supply.
d. Check for approximate correct resistance on the fuser cable:
• 220V fuser—43 ohms
• 110V fuser—10 ohms
• 100V fuser—8 ohms
5. Check the fuser rollers, belts and gears for damage and debris.
6. Replace the fuser.
7. Replace the LVPS.

Additional Repair Advice

1. Turn the machine off then back. A sudden loss of power like when the lights flicker in the office on a windy day or during a thunderstorm can cause fuser errors. Turning the machine off then back on can clear errors like this.

2. Check the paper type settings in the control panel match the paper being printed on. Paper type mismatch situations can lead to fuser errors. Also, check the fuser temp settings if needed.

3. Plug the machine straight into a wall outlet for testing. Power strips and battery back ups can result in a poor power source.

4. Remove the fuser and check for debris on the thermistors that could cause poor temperature readings.

5. Replace the fusing assembly.

Click on the Link Below for the fuser replacement instructions

Lexmark MS510 and MS610 Fuser Replacement Procedure – 40X8023

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