Users Manual Part 2

10.4.1
Electrostatic Discharge Precaution
The Base Radio circuitry contains many CMOS and other electrostatic discharge sensitive devices.
Take precautionary measures to prevent damage of Base Radio modules by static discharge when
servicing the equipment.
Observe the following additional precautions:
• Wear a wrist strap (Motorola Part No. 4280385A59 or equivalent) at all times when servicing the
Base Radio to minimize static build up.
• A jack is provided at top left of module cage marked with the ground symbol.
• Keep spare modules in factory packaging for transporting. When shipping modules, always pack in
original packaging.
For more information, see Static Precautions and ESD Strap on page
492.
10.4.2
Restoring the Base Radio
Process:
1 Remove the Base Radio.
See Removing the Base Radio on page 355.
2 Reinstall the Base Radio.
See Reinstalling the Base Radio on page 356.
10.4.2.1
Removing the Base Radio
Procedure:
1 Remove power from the MTS by switching off the Power Supply Unit.
NOTICE: To perform a hotswap of a Base Radio, do not turn off the Power Supply.
Connect a terminal to the Service Port and log in. Make sure the Base Radio is not
transmitting by entering the MMI command:
• From the Base Radio Core or Boot1 use: dekey
• From the Test Application use: power -otxch1 -a0.0
For more information on this command, see MMI Commands Manual.
2 Unplug the cables at front of the Base Radio.
3 Remove the TORX screws securing the faulty module to the chassis; these are located on the
top and bottom of the front plate of the faulty module. Save the screws for reuse.
4 CAUTION: The module can be very hot. To avoid injury, allow the module to cool down
before servicing.
Pull out the module.
6802800U74-AP
Chapter 10: Base Radio
355