Ricoh D131 Service Manual page 910

22. Reattach the bottom edge of the IPU ( x3, x1).
23. Remove the three cut-outs from the controller box with a flat-headed screwdriver: LINE 1,
TEL, and LINE 2.
24. Set the modular jack in the groove of the G3 connector bracket.
25. Push the head of the jack down so it locks in place.
D619 18 SM