Up/Down Movement

When a selected mirror is moved up by the Mirror Adjustment Switch
(X146) the internal contacts move to the "Up/Down Select" and "Move Left or Up" position. Voltage is applied to the internal solenoid of the selected mirror actuator through the BN, BK, WP, and PW wires. The solenoid energizes because the other side of the coil is grounded at E200 or E201 through the B wire. The energized solenoid engages the motor in the actuator with the Up/Down Gearbox. Voltage is applied to the selected mirror actuator's motor at terminal 4 through the SW and PR wires. The selected mirror actuator's motor is grounded at E201 through the BU, PU and BP wires, the switch contacts, and the B wire. The mirror now moves up.

When a selected mirror is moved down by the Mirror Adjustment Switch (X146) the internal contacts remain in the "Up/Down Select" position but move to the "Move Right or Down" position. The internal solenoid remains energized. Voltage is now applied to the selected mirror actuator's motor at terminal 5 through the BU, PU and BP wires. The selected mirror actuator's motor is now grounded at E201 through the PP and SW wires, the switch contacts, and the B wire. Since the polarity of the voltage to the motor has been reversed, the mirror now moves down.