Product Info

Field Upgrade
22 (50) © Nokia Corporation Draft DN00187365
Nokia Proprietary and Confidential Issue 2-0 en
Removing the PSU
1. Turn the PSU power switch to Stand-by and turn the power OFF at the
BTS’s main power disconnect device.
2. Open the power connector cover on the PSU by removing the retaining
screws with a T10 Torx driver (see Figure 3).
3. Unplug the power supply cable from the PSU.
4. Loosen the unit's upper and lower retaining screws on the mounting
brackets using a T10 Torx driver.
5. Slide the PSU unit out until it comes to a stop, then tilt the unit from the top
and remove it (see Figure 4).
Figure 3. Power supply unit
Upper mounting bracket
Main power switch
Power connector cover
Power cable seal
Power cable
Lower mounting bracket
Retaining screws