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3
Replacing the power supply unit
The power supply unit (PSU) must be replaced only if the MetroSite BTS
installation is being upgraded from a 1W TRX configuration. See Table 4 for the
correct type of PSU replacements for a 5W TRX installation.
Note
The PSU does not need replacing for 5W GSM to 5W GSM/EDGE field
upgrades.
Table 4.
Input voltage
AC 230 V
AC 110 V
DC +24 V
DC -48 V
3.1
PSU removal
WARNING
Make sure that the power is turned OFF at the main disconnect device before
working on the PSU.
DN00187365
© Nokia Corporation
Issue 2-0 en
Nokia Proprietary and Confidential
PSU types used in MetroSite base stations
1W TRX BTS
installations
VSAA
VSAB
-
VSDA
Draft
Replacing the power supply unit
5W TRX BTS
installations
HVSA
HVSB
HVSC
HVSD
21 (50)
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