| Step |
Check description |
Assumed cause |
Measures |
| 1 |
Firmware upgrade |
The firmware is not latest version. |
Upgrade the firmware to the latest version. |
| 2 |
Checking the operation when opening/closing the waste toner box cover. |
(Separate the factor) |
If the waste toner box does not rotate when opening and closing the waste toner box cover, go to the next step (Step 3) since the phenomenon is caused by the weight detection actuator. If it rotates, go to Step 4 since the phenomenon is caused by the waste toner box or the waste toner full sensor. |
| 3 |
Checking the weight detection actuator |
The weight detection actuator does not return to the original position when detaching and reinstalling the waste toner box. |
Repair the weight detection actuator to return it to the proper position. |
| 4 |
Reinstalling the waste toner box and cleaning the waste toner full sensor |
Toner adheres on the surface of the waste toner full sensor (piezoelectric sensor). |
Pull out the waste toner box and reinstall it. Or, clean the surface of the waste toner full sensor. |
| 5 |
Cleaning the waste toner box joint section |
The waste toner is clogged at the waste toner joint section. |
Clean inside the waste toner box joint section of the main drive unit. |
| 6 |
Replacing the waste toner full sensor |
Waste toner full sensor (piezoelectric sensor) is wrongly detected. |
Reconnect the connector of the waste toner full sensor. And next, measure the output voltage of the waste toner full sensor. (Undetected: 0V, Full detection: 3.3V). If there is output of 3.3V even the waste toner is not full in the waste toner box, replace the waste toner full sensor. |