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What This Error Means

The Lexmark TS.02 error indicates that the fuser's temperature sensing thermistor is registering an open circuit, preventing the fuser from reaching or maintaining its operational temperature.

Detailed Explanation

The TS.02 error on Lexmark printers specifically points to an issue with the fuser assembly's thermistor, which is a critical component responsible for monitoring and regulating the fuser's temperature. An 'open circuit' means that the electrical path through the thermistor is broken, preventing it from sending accurate temperature readings to the printer's main control board. Without these readings, the printer cannot safely heat the fuser, leading to a complete halt in printing operations to prevent potential damage or fire hazards. This error typically arises from either a physical disconnection of the thermistor's wiring, a faulty thermistor itself, or in rarer cases, a problem with the fuser's heating lamp or the main control board that processes the thermistor's input. The fuser is the part of the printer that uses heat and pressure to bond toner to the paper, making its precise temperature control essential for print quality and printer safety. When the TS.02 error appears, it's a direct indication that this vital temperature control mechanism is compromised.

DIY Troubleshooting Steps

Try these steps before calling a specialist

1
Turn off the printer completely and unplug it from the power source.
2
Allow the printer to cool down for at least 30 minutes, as the fuser can be extremely hot.
3
Carefully open the rear access panel or the fuser access door (refer to your printer's manual for exact location).
4
Inspect the fuser unit for any visible obstructions, loose connections, or signs of damage. Sometimes, a paper jam can put stress on components.
5
Gently, but firmly, reseat the fuser unit. Ensure it is properly locked into place, as loose connections can sometimes trigger sensor errors.
6
Check for any disconnected or frayed wires leading to the fuser assembly. If accessible, gently push in any connectors that appear loose.
7
Close all access panels securely.
8
Plug the printer back in and power it on. Observe if the error clears.
9
If the error persists, try performing a hard reset by unplugging the printer for a few minutes, then plugging it back in and powering on.
10
Attempt to print a test page to verify if the issue is resolved.

When to Call a Specialist

If after performing all the DIY troubleshooting steps the TS.02 error persists, it's time to call a qualified printer technician. This error often indicates a failure of the fuser thermistor itself, or potentially the fuser heating element, or even a problem with the main control board. These components are typically not user-serviceable and require specialized tools and expertise to diagnose and replace safely. Attempting to replace fuser components without proper training can lead to further damage to the printer or personal injury due to high voltage and heat.

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LEXMARK Error Code TS.02