Caution when re-installing the controller board

This section describes handling the controller board when installing options.

If you slide out the controller board to install units, carefully read the instruction to re-install the controller board.

The following may occur if the controller board is not properly installed:
- all control panel indicators are lit.
- no control panel indicators are lit.
- the error message appears on the display.

Re-install the controller board into the printer by pushing the bottom center area of the board.