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Initial Power–up Tests and Procedures
Common Power Supply Verification
2
Step
Physically verify that all DC power sources supplying the frame are OFF or disabled.
1
2
On each frame:
Unseat all circuit boards (except CCD and CIO cards) in the C–CCP shelf and LPA shelves, but
S
leave them in their associated slots.
Set breakers to the OFF position by pulling out C–CCP and LPA breakers (see Figure 2-3 for
S
breaker panel layout if required).
– C–CCP shelf breakers are labeled CCCP–1, 2, 3.
– LPA breakers are labeled 1A–1B through 4C–4D.
3
On –48 V BTS: Remove the –48 V to +27 V Power Supply Modules.
4
Inspect input cables, verify correct input power polarity via decal on top of frame.
5
Apply power to BTS frames, one at a time, by setting the appropriate breaker in the power supply that
supplies the frame to the ON position.
6
After power is applied to each frame, use a digital voltmeter to verify power supply output voltages at
the top of each BTS frame are within specifications:
On –48 V BTS: –48 Vdc nominal
On +27 V BTS: +27 Vdc nominal
7
On –48 V BTS: Plug in PSMs one at a time and verify 'Green' LEDs on PSMs light.
2-10
The procedure in Table 2-4 must be performed on any BTS frame
connected to a common power supply at the site after the common power
supply has been installed and verified per the power supply OEM
suggested procedures.
Perform the following steps to verify the power input is within
specification before powering up the individual cards/modules with the
frames themselves.
CAUTION
While handling any circuit card/module, always wear a
conductive, high impedance wrist strap to prevent damage
by ESD. Extreme care should be taken during the removal and
installation of any card/module. After removal, the card/module
should be placed on a conductive surface or back into the
anti–static bag in which it was shipped.
Table 2-4: Common Power Supply Verification
1X SC 4812T-MC Multicarrier BTS Optimization/ATP
Action
68P64115A21–B
Sept 2003
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