The Yellow ATC Sensor detects a low TC (toner concentration).
Initial Action
- Check that Toner/Developer is present.
- Check the Yellow ATC Sensor for contamination. Ensure that the sensor is seated correctly.
NOTE:
To clear this fault, enter Component Control and set the value of NVM location 752-109 to 0.
This can be caused by many things. I've seen broken Drum contacts from improper drum installation causing Developer bead carryover. Toner dispense motor assy's failing. Developer Housing failure. DVHVPS failure.
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