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User's Manual Part 3

ManualsBrandsNokia Solutions and Networks ManualsElectronics1X SC480 BTS Microcell Base Station Transmitter
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Compact BTS Input and Output Board
MAY 2004 1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU 9-45
PRELIMINARY
Introduction
The procedures in this section cover only the removal and installation of
the Compact BTS Input and Output (CBIO) Board.
System Impact/Considerations
If the CBIO board is failing or has failed there will be an interruption in
call processing. The entire site will be down for replacement of this
component.
CBIO Indicators
The CBIO Board has six indicators that provide status of several
components of the BTS. The six LEDs are +28V, +15V, HSO, MOD,
+5V, and ISO.
+28V LED
The +28V LED indicates the status of the DC power that is supplied to
the Remote GPS or the RF GPS module. This LED will come on after
the CSA initializes. When the CSA is trying to determine the cable
delay, this LED will go OFF and ON, but it should stay ON once the
delay is successfully completed. If the LED remains OFF, it may
indicate a problem with either the RGPS or RF GPS, or the CSA FRU.
+15V LED
The +15V LED indicates the status of the DC power that is coming from
the DC–DC converter module to the CBIO Board. This LED should
always be ON, unless there is a blown fuse on the CBIO Board.
HSO LED
The HSO LED indicates the status of the DC power that is supplied to
the HSO or MSO module. This LED will be OFF, if the HSO or MSO
is not connected; otherwise, it is ON. Faulty operation of the LED may
be related to problems with the main +15V supply to the CBIO Board,
also indicated by the +15V LED.
MOD LED
The MOD LED indicates the status of the DC power that is supplied to
the modem module. However, this LED is not dependent on whether the
modem module is plugged in or not, and should be always ON. If the
CBIO +5V supply is okay, then the LED being OFF could indicate a
problem with the modem module, the wiring, or a resettable fuse on the
CBIO Board.
+5V LED
The +5V LED indicates the status of the DC power that is coming from
the DC–DC converter module to the CBIO Board. This LED should
always be ON, unless there is a blown fuse on the CBIO Board.
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