1-3 Removing the Built-in Resistor 1-3 Removing the Built-in Resistor 1 To remove the built-in resistor, follow the procedure described below (3G3AX-RB21/-RBU22/- RBU41 only). Design 1. Disconnect the lead wires connected from the built-in resistor to the P and RB ter- minals on the PCB, and to the R1 and R2 terminals on the fin. RB P PCB AL1 AL2 R1R2 Fin Disconnect all four cables. Built-in resistor 2. Remove the built-in resistor from the bottom of the unit. 3. Reconnect the wiring between the AL1 and R1 terminals and between the AL2 and R2 terminals on the fin. 1-6