Troubleshooting Checklist; Table 2. Troubleshooting Checklist - Nokia MetroSite Maintenance Manual

5.2

Troubleshooting checklist

Table 2.
Symptom
BTS is powered ON but
the BTS Manager
connection cannot be
established.
No power to the BTS.
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Troubleshooting checklist
Possible fault
1. Master TRX broken.
2. Interface unit broken.
3. Wrong BTS Manager
port setting (COM 1, COM
2).
4. LMP cable broken or
not properly connected.
1. Fault in the site mains
power supply.
2. Broken power cable.
3. Power supply unit
broken.
4. Short circuit in one of
the BTS units.
5. Power supply unit
switch in stand-by
position.
6. Cold start active.
Draft
Maintenance
Action
1. Replace the master
TRX with one of the slave
TRXs and insert a new
TRX into the slave TRX's
slot. Refer to Section
6.4.3.
2. Replace the interface
unit.
3. Correct the COM port
settings.
4. Check the connection
before replacing the cable.
1. Check the site's mains
power source and fuses.
Replace if necessary.
2. Replace the cable.
3. Replace the power
supply unit.
4. Pull the units out one by
one until the power comes
back on. Start from the
TRXs and proceed to the
transmission unit, fan unit
and finally to the interface
unit. Return the units one
by one and replace the
faulty unit(s).
5. Turn the PSU's switch to
the ON position.
6. Wait until the units have
warmed up to the
operational temperature
range and the power
supply unit LED turns
green.
DN9913495
Issue 3-0 en