Compuprint 9050 LAN Installation - Manual (Page 6)

Replacing the Controller Board
Attention: Ensure that the printer is powered off
before installing or removing the Controller Board.
If the Controller Board is installed while the printer is
powered on, the controller will not synchronize with
the printer mechanism board.
Unpredictable printer behavior will result.
Perform the following steps to replace the Controller
Board:
1. Ensure that the printer is powered off. Installing
the Controller Board with the printer power on will
result in unpredictable printer behavior.
2. Use the screwdriver that came in the Controller
Board box to remove the existing Controller Board
and pull out the card.
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3. Use the information under “Handling the
Controller Board” on the preceding page as you
remove the Controller Board from its shipping box
and from the protective package.