User's Manual

68P81093C75-A 9-25
Module Replacement
Procedures
Station modules suspected of being faulty must be replaced with
modules known to be in good condition in order to restore the station
to proper operation. The following procedures provide instructions
for replacing each of the station modules and performing any
required post-replacement adjustments or programming.
General Replacement
Information
Anti-Static Precaution
The station circuitry contains many C-MOS and other static-
sensitive devices. When servicing the equipment, you must take
precautionary steps to prevent damage to the modules from static
discharge. Complete information on prevention of static protection
is provided in Motorola publication number 68P81106E84,
available through the Accessories and Aftermarket Division.
Some additional precautions are as follows:
• A wrist strap (Motorola part number RSX4015A, or equivalent)
should be worn while servicing the equipment to minimize static
buildup.
• Do not insert or remove modules with power applied. Always
turn off the station by unplugging the AC and DC cords from the
top panel before inserting or removing modules.
• All spare modules should be kept in a conductive bag for storage
and transporting. When shipping modules to the repair depot,
always pack them in conductive material.
Care of Gold-Plated
Connector Contacts
The connectors between the modules and the station backplane
board are made with gold-plated card edge connector contacts to
provide maximum reliability. Gold-plated materials do not form a
non-conductive oxide layer and therefore should not require
cleaning under normal conditions.
When the modules have been subjected to many extraction/insertion
cycles, or if the station is operated in a dusty environment, the
contacts may require cleaning. Do not use an eraser or any type of
abrasive substance to clean either the module card edge connectors
or the backplane connector contacts.
WARNING: When wearing a Conductive Wrist Strap, be careful near sources of high voltage.
The good ground provided by the wrist strap will also increase the danger of lethal shock
from accidentally touching high voltage sources.
!
CAUTION: DO NOT insert or remove station modules with power applied. This may result in
damage to the modules.
!