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4-4
Maintenance
3930 Service Delivery Switch
Hardware Installation and Start-up Manual
009-3223-001 Standard Revision E
Copyright
©
2012-2014 Ciena
®
Corporation
January 2014
Procedure 4-2
Replacing a DC Power Supply
Step
Action
1
Remove the new power supply module from the packaging and inspect it for
damage.
2
Remove power from the DC circuit that supplies power to the DC power
supply module being replaced.
The Input LED on the power supply will turn off.
3
Using a flat head screwdriver, remove the plastic cover from the front of the
power supply.
4
Using a Phillips screwdriver, loosen the set screws on the terminal block and
remove the wires from the DC power supply.
5
Using a Phillips screwdriver, loosen the captive hold down screw on the right
of the module.
6
Pull the power supply module out of the slot and set it aside.
7
Slide the new power supply module into the empty slot.
8
Using a Phillips screwdriver, secure the module in place using the captive
hold down screw on the right of the module.
9
Use the terminal block on the front of the DC power supply to connect the
wires as follows:
•
Ground — connect to the right connector
•
Negative — connect to the middle connector
•
Positive — connect to the left connector
Note:
The ground connection should be made first.
10
Tighten the set screws on the terminal block with a Phillips screwdriver.
WARNING:
To prevent ESD damage to electronic components, always use an ESD
wrist strap when handling modules.
WARNING:
Before performing the procedure, ensure that all power is off to the DC
circuit. Locate the circuit and switch it to the OFF position. Tape the circuit breaker
switch handle in the OFF position to prevent accidental closing of the circuit.
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