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Appendix B - Replacing Battery on CPU
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Enova Digital Media Switchers - Hardware Reference Manual
Appendix B - Replacing Battery on CPU
Overview
This appendix provides instructions for removing and installing the battery on the CPU for the Enova DGX 100 Series and
setting the CPU’s clock. The procedure can be done while the enclosure is in a rack, but the system must be powered
down.
The Enova DGX Switcher uses a coin-type (button cell) lithium battery in a timekeeper function. Only one CPU battery is
installed within a given enclosure. The battery can be expected to have up to 4.25 years of usable life under very adverse
conditions. Actual life is appreciably longer under normal operating conditions. This calculation is based on storing the
unit without power in 50° C (122° F) temperature until battery levels are no longer acceptable.
WARNING: Risk of explosion if battery is replaced by an incorrect type.
Removing and Installing the CPU Battery
CAUTION:
Do not remove the CPU board until you are ready to install the CPU battery, unless directed to do so by
technical support.
Items Required
Replacement battery for Enova DGX CPU
Phillips #1 screwdriver
ESD wristband and cord with alligator clip
ESD WARNING: To avoid ESD (Electrostatic Discharge) damage to sensitive components, make sure you are properly grounded
before touching any internal Enova DGX materials. Use an ESD wristband and cord with an alligator clip attached to a good
ground source.
Instructions are provided for removing and installing the battery on the CPU and setting the CPU’s clock.
Removing and Installing an DGX CPU Battery
1.
Disconnect
all AC power cords
(Enova DGX 800/1600/3200 – two power cords; Enova DGX 6400 - four power cords).
Make sure that none of the power supply LEDs are illuminated.
2.
Disconnect
all cables
connected to the CPU and unplug the AxLink connector.
3.
Enova DGX 800/1600/3200
– Remove the three screws from the CPU faceplate (FIG. 132):
NOTE:
Removal of the CPU board is easier if the two metal plates under the CPU are removed first.
4.
Enova DGX 6400
– Remove the four screws from the CPU faceplate (FIG. 133):
5.
Remove the CPU faceplate and set aside.
IMPORTANT:
The CPU does not need to be extracted all the way to replace the battery.
6.
Use the tab indicated in FIG. 134 to pull the CPU board approximately four inches straight out of the enclosure:
FIG. 132
CPU board DGX 800/1600/3200 - Remove screws indicated
FIG. 133
CPU board DGX 6400 - Remove screws indicated