User's Manual Part 3

RBS 2109 User’s Guide
Table 57 Pins and Functions
Connector Pin
Function
3
PE
5
AC_L2
6
AC_L1
• Replace the PIB in the MBU, see Section 9.5.5 PIB Replacement on page
202
• Replace the IXU, see Section 9.5.3 IXU Replacement on page 195
IXU Temp
If the IXU temp indicator is ON (yellow) and the conditions are hot, perform the
following actions step-by-step until the fault ceases:
• Ensure that airflow is not obstructed above or below the RRU, or through its
cooling flanges
• Install the IXU cabinet at a colder location
If the IXU temp indicator is ON (yellow) and the conditions are cold, perform the
following actions step-by-step until the fault ceases:
Note: The IXU will not start if it is too cold. It can take up to 75 minutes for the
internal heater to warm up the IXU.
• Ensure that the IXU is provided with AC Mains power, since the heater in
the IXU only works when AC Mains power supply is available
• Install the IXU cabinet at a warmer location
Transmission OK
If a Transmission OK port LED indicator is OFF (green), even though
transmission is expected, then perform the following actions step-by-step until
the fault ceases:
• Ensure that the TIM is properly mounted, and the selector switch for
transmission impedance selection is set correctly for each port
• Ensure that the transmission cables have been properly connected to the
right port in the IXU, and each cable thread connected to the correct inlet
Note: The order of the ports in the IXU is: A C B D.
• Ensure that the external transmission equipment is working properly and
that cables are connected correctly
181EN/LZT 720 0090 Uen R1A 2004-09-17