Hi,
The code refers to the black toner supply fault. This is usually caused by the toner compacting in the toner cartridge. There have been a couple of instances where the plastic strip remains when the cartridge is replaced. If this isn't the case then the solution is to remove the black toner cartridge & gently but firmly tapping the toner cartridge to break up the compacted toner. Re-installing the cartridge & turning the machine off & then on should reset the error code. If the code remains it may also indicate a faulty toner cartridge & this can be proven by replacing the black toner cartridge with another one. If, after replacing the toner cartridge with a replacement, the code re-occurs then this could indicate damaged toner supply gears which would require a technician to verify, but the most common cause tends to be the toner cartridge is at fault.
Hope this helps.
Dave.
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