- Open the upper right cover [A].
 - Move down the paper tray. To do this, cover the photo sensor with your left hand and press the bottom plate operation button [A].
 - Move the front side fence [A] and rear side fence [B] to the B4 or LG position.
 - Close the upper right cover to move the paper tray up. (The paper tray stops in about 30 seconds.)
 - Switch the machine off and unplug the machine.
 - Disconnect the LCIT power connector from the machine.
 - Remove the right cover of the LCIT. (LCIT RT4020 (D709))
 - Release the LCIT from the main machine.
 - Slide the LCIT [A] against the main machine, and then remove it from the rail [B].

 - Remove the following covers. (LCIT RT4020 (D709))
- Upper right cover
 - Upper left cover
 - Rear left cover
 - Rear cover
 - Left cover
 
 - Remove the lower limit sensor bracket [A].

 - Install the lower limit sensor bracket [A] at the higher position.

 - Pull the sensor connector wire removed in step 11 through the hole [A] from the left side of the LCIT.
 - Release the sensor connector wire from the clamp [B].
 - Put the sensor connector wire to the right side of the LCIT through the hole [A].
 - Connect the sensor connector wire to the lower limit sensor [A].
 - Attach the harness clamp to the rear of the plate [A]. Use this clamp to hold the sensor connector wire.
 - Reattach the following covers.
- Left cover
 - Rear cover
 - Rear left cover
 - Upper left cover
 
 - Remove the right stay [A].
Bring back or discard the stay after removing it. Attach the front bracket [A] with the beveled corner down.
- If the brackets are not easy to install, lift the bottom plate with your hand.
 
- Attach the rear bracket [B] with the beveled corner down.
 - Attach the bottom plate extension [C] with the hex screws.
 Attach the B4/LG frame [A] with the hex screws.
Insert the positioning pin [B] of the B4/LG frame [A] into the hole of the LCIT.
- Attach the right cover [B].
 - Attach the upper right cover [A] provided with the 8 1/2" x 14" Paper Size Tray Type M2.
 - Install the LCIT on the main machine. (LCIT RT4020 (D709))
 - Plug in and turn ON the machine.
 - Go into the SP mode and do 5-959-003.
 - Input "5" for B4 SEF or "6" for 8.5" x 14" SEF.