# C3C4 Additional Main Board

Check Point / チェックポイント

Be sure to perform a FW update after replacing parts.

1. Remove the 4 screws fixing the C3C4 Additional Rear Cover (A).
   
   
   • : 3x8D
2. While pulling the C3 and C4 Additional Rear Covers (A) out in the direction of the red arrow, rotate it in the direction of the blue arrow to disengage the 3 hooks, then remove the C3 and C4 Additional Rear Covers.
   
3. Disconnect the cables from the connectors (B) (CN1/CN2/CN3/CN4/CN5/CN6) of the C3C4 Additional Main Board (A).
   
4. Remove 4 screws and remove the C3C4 Additional Main Board (A).
   
   
   • : 3x8D