Product Info
Table Of Contents
- Field Upgrade
- 1 Overview of field upgrade
- 2 Preparing for upgrade
- 3 Replacing the power supply unit
- 4 Replacing the cooling fan
- 5 Replacing or installing new TRX units
- 6 Chaining Nokia MetroSite EDGE BTSs
- 7 Commissioning for upgrade
- 8 Completing the upgrade
Preparing for upgrade
DN00187365 © Nokia Corporation Draft 13 (50)
Issue 2-0 en Nokia Proprietary and Confidential
WARNING
WARNING
Note
2 Preparing for upgrade
Before starting any upgrade procedures, the procedures and precautions presented
in this chapter should be read and implemented as required.
Some of the upgrade procedures require the BTS to be powered down. Read
Section 2.1, Power supply precautions, in this chapter before beginning the
upgrade.
2.1 Power supply precautions
Potentially lethal voltages!
The BTS power must be switched OFF at the main disconnect device or
circuit breaker before starting maintenance work which involves the risk of
electric shocks.
Prevent injury to personnel or damage to the BTS equipment by following the
power supply rules for maintenance and upgrade procedures presented in Table .
The switch on the power supply unit (PSU) of the BTS has two positions: ON and
Stand-by.