Ricoh D146 Service Manual page 1779

3. Remove the "TEL" [A] and "LINE1" [B] covers with a screw driver.
4. Install the FCU [A] on the controller (

Insert the tab [B] of the FCU bracket in the cutout on the left of the controller box.

Make sure that both connectors [C] are connected.
5. Switch the battery jumper switch [A] to the "ON" position.
SM
x 2).
3 D163