9-32Installation and Maintenance VolumeOctel Overture 200/300 Serenade 3.0 PB60014–01Caution!To avoid risk of electric shock, wait 2 minutes afterturning OFF the message server to remove the powersupply unit.4. Remove the floppy-disk-drive signal cable from the CPU.5. Using a flat-bladed screwdriver, loosen the two captive screws on the front of the power supply unit.6. Gripping the power supply unit handle, pull the power supply unit firmly to unseat the rear-mountedconnectors. Continue to pull out the power supply unit, ready to support the bottom of the powersupply unit with one hand when it clears the cabinet.Installing the Power Supply UnitTo install the power supply unit, use the following procedure:1. Put on an antistatic wrist strap. Connect it to an unpainted portion of the cabinet.2. Verify that the power supply switch is OFF. The power supply unit switch is a circuit-breaker rockerswitch. On the Octel Overture 200, the power supply unit switch is OFF when the bottom of the rocker,marked 0, is pressed in. The switch is ON when the top of the rocker, marked 1, is pressed in. On the Octel Overture 300, the switch is OFF when the side of the rocker, marked 0, is pressedin. The switch is ON when the side of the rocker, marked 1, is pressed in.Caution!Installing the power supply unit with the circuitbreaker ON and the power cord attached to theprimary power could damage the power supply unitor the message server.3. Pick up the power supply unit with one hand on the handle and the other hand under the unit tosupport its weight. Support the power supply by holding the sheet-metal slider. Do not touch anypower-supply electrical components or wiring.4. Line up the edges of the power-supply-unit sheet metal, with the card guides marked A10 on theOctel Overture 200 and A15 on the Octel Overture 300, and slide the power supply unit halfway intothe cabinet. Remove your supporting hand from the bottom of the sheet-metal plate.5. Once again, confirm that the circuit breaker is OFF.6. Gently, but firmly, continue to slide the power supply unit into the cabinet by pushing on the handleuntil the connectors on the back of the unit have mated with the connectors on the motherboard. Thisis accomplished when the flange on the front sheet metal of the power supply unit reaches or verynearly reaches the sheet metal of the cabinet.Caution!Do not slam the power supply unit into the cabinet.This could damage the power supply unit.
