Lexmark CX725

Lexmark printers, copiers
Peter
Posts: 34
Joined: Sat Oct 21, 2017 9:46 pm

Lexmark CX725

Postby Peter » Thu Feb 11, 2021 3:21 pm

We have an error on our Lexmark Printer CX725 121.71A Fuser Service error.
How to fix?
Bill
Posts: 44
Joined: Sat Oct 21, 2017 9:50 pm

Re: Lexmark CX725

Postby Bill » Sat Mar 13, 2021 11:07 pm

Code 121.xx Fuser error
  • 121.02 Fuser went over the required temperature during EWC/line voltage detection.
  • 121.03 Fuser hardware and driver mismatch.
  • 121.06 Fuser power is at 100% but did not reach the required temperature.
  • 121.08 Fuser did not reach the required temperature while the page is in the fuser.
  • 121.09 Fuser did not reach the required temperature for motors. Note: Not applicable to standby mode.
  • 121.10 Fuser did not reach the required temperature during start of EWC/line voltage detection.
  • 121.11 Fuser reached the required temperature during final EWC/line voltage detection too late.
  • 121.12 Fuser did not reach the required temperature during final EWC/line voltage detection.
  • 121.13 Fuser reached the required temperature during final EWC/line voltage detection too fast.
  • 121.20 Fuser did not reach the required temperature during steady state control.
  • 121.21 Fuser low power trace heating rate exceeded error threshold.
  • 121.22 Open fuser relay was detected.
  • 121.23 Fuser reached the required temperature during final EWC/line voltage detection too late.
  • 121.24 Fuser did not reach the required temperature during final EWC/line voltage detection.
  • 121.25 Control did not roll over to steady state control after line voltage detection.
  • 121.26 Fuser did not reach the required temperature during warm up.
  • 121.28 Fuser did not reach the required temperature during EP warm up.
  • 121.30 Fuser is on for more than the allowed time after a gap blowout, and did not reach the required temperature.
  • 121.31 Fuser too hot.
  • 121.32 Fuser did not reach the required temperature at 100% power.
  • 121.33 Fuser did not reach the required temperature while the page is in the fuser.
  • 121.34 Fuser did not reach the required temperature during steady state control.
  • 121.35 Fuser too warm to power up and execute EWC/line voltage detection after a wrong fuser was installed.
  • 121.36 Open fuser relay was detected in very cold or unknown ambient temperature.
  • 121.37 Fuser heated too fast during final EWC/lline voltage detection.
  • 121.41 Fuser mechanism did not detect the expected cam sensor signal.
  • 121.42 Fuser gate time increasing out of control.
  • 121.48 Fuser type does not match the fuser driver.
  • 121.50 Fuser went over the required temperature during global over temperature check.
  • 121.51 Fuser secondary heater is too hot.
  • 121.70 Heater resistance is too high.
  • 121.71 Open fuser main heater thermistor was detected.
  • 121.72 Open fuser secondary heater thermistor was detected.
  • 121.73 Open fuser middle heater thermistor was detected.
  • 121.74 Open fuser edge thermistor was detected.
  • 121.76 Open contact belt thermistor was detected.
  • 121.81 Open fuser backup roll thermistor was detected.
  • 121.82 Open fuser second backup roll thermistor was detected.
  • 121.83 Open fuser narrow media backup roll thermistor was detected.
  • 121.84 Non. contact sensor (BUR) is missing.
Solution:
  1. Check the fuser for proper installation.
    Is the fuser properly installed?
    YES: Go to step 3.
    NO: Go to step 2.
  2. Reinstall the fuser.
    Does the problem remain?
    YES: Go to step 3.
    NO: The problem is solved.
  3. Check the LVPS cable on the LVPS and on the JFSNS connector on the controller for proper connection.
    Is the cable properly connected at both ends?
    YES: Go to step 5.
    NO: Go to step 4.
  4. Reconnect the cable.
    Does the problem remain?
    YES: Go to step 5.
    NO: The problem is solved.
  5. Check the cable for damage, and replace if necessary.
    Does the problem remain?
    YES: Go to step 6.
    NO: The problem is solved.
  6. Check the fuser cable for proper connection and damage, and replace if necessary.
    Does the problem remain?
    YES: Go to step 7.
    NO: The problem is solved.
  7. Replace the fuser.
    Does the problem remain?
    YES: Go to step 8.
    NO: The problem is solved.
  8. Replace the LVPS
    Does the problem remain?
    YES: Go to step 9.
    NO: The problem is solved.
  9. Replace the controller board
    Does the problem remain?
    YES: Contact the next level of support.
    NO: The problem is solved.

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