User's Manual Part 3

RBS 2109 User’s Guide
Perform the following actions step-by-step until the fault ceases:
Checking IDB Configuration
1. In the OMT, ensure that the IDB is in accordance with the HW cabinet
configuration.
Checking RRU Power
Perform the following actions step-by-step until the fault ceases, or until the
RRU power is confirmed.
Note: This is only valid for an RRU connected to the Y link-generated alarm.
2. Check that the indicators AC Power on/DC Power on on the RRU interface
panel are ON.
3. Open the RBS and check that the RRU power is switched on.
4. Check that the power cable from the MBU to the RRU is correctly connected.
5. Disconnect the power cable from the RRU and use a multimeter to check
that the correct voltage is being supplied to the RRU, see Figure and Table
below.
For more information about correct voltage, see:
RBS 2308, RBS 2309, RBS 2109 and
EBB-06 Hardware Reference Manual
EN/LZT 720 0058
1
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N/LZT 720 0090 Uen R1A 2004-09-17