Issue
The message <1H CHK TNR CONN.> appears in the display on the control panel.
The message <1H CHK TNR CONN.> appears in the display on the control panel.
Cause and Solution
There is a possibility that the toner cartridge is not installed properly.
<Remedy 1>
Remove the toner cartridge, then reinstall it properly.
<Remedy 2>
If <1H CHK TNR CONN.> appears and there is a problem with the print quality even after applying the Remedy 1, remove the toner cartridge and replace it with a new one.
[Replacing the Toner Cartridge]