Lexmark Optra T 630, 632, and 634 Series Printer 921 Fuser Error

 

Diagnostic Aids for the 921 Fuser Error on the Lexmark Optra T 630, 632, and 634 Series Printers

Like the 920 error the 921 Fuser Error is a result of a low temperature reading on the fuser hot roller. The difference between the two is that the 921 Fuser Error is a low temperature reading when the machine is at an idle state where the 920 is while printing. Typically, I don’t see this error as often as the 920 but it still is one of the more common fuser errors. The quick repair tips are pretty much the same for this error.
Lexmark Optra T630, T632, T634 921 Fuser Error


Lexmark T630/T632 Fuser Assembly (56P1333)

Quick Troubleshooting Tips

1. Turn the unit off then back on. Like any low temperature error, these errors sometimes will happen out of the blue and a simple machine reset will fix the issue.

2. If the problem continues check the power source. Make sure the device is plugged straight into a wall outlet. Do not plug these machines into power strips with multiple devices or battery back ups as these situations can lead to power struggles with other devices.

3. Check the environment. I don’t recommend running them in temperatures under 60 decrees and never plug them in if you have had it sitting in an extreme cold temperature for an extended amount of time.

4. Remove the fusing assembly and clean the surface of the thermistor and check for continuity.
Click on the link below for fusing assembly Replacement and additional details.
Lexmark Optra T Fuser Replacement T630, T632, and T634 Printers

5. Run the extended fusing assembly cold check.
Click on the link below for additional service information on the fusing assembly checks.
Cold Fuser Check – Lexmark T630, T632, T634 Printer Repair

Note: Very rarely do you have to take the troubleshooting steps to checking the voltages. 99% of your problems will be resolved with replacement of the fusing assembly. So if you skip the cold fuser check link your probably not missing out on much unless you feel like creating more work for yourself.

Click on the link below for fusing assembly buying options and additional details.

Lexmark T630/T632 Fuser Assembly (56P1333)

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