User's Manual
Table Of Contents
- Front Cover
- Contents
- 1 - Foreword 11
- 2 - Safety and General Information 21
- 3 - Introduction 31
- 4 - System Applications 41
- 5 - Models and Specifications 51
- 6 - Approved Accessories 61
- 7 - Setup and Connections 71
- 8 - Operation 81
- 9 - Troubleshooting 91
- Introduction 91
- Recommended Test Equipment 91
- Troubleshooting Procedures 91
- Module Replacement Procedures 925
- General Replacement Information 925
- Anti-Static Precaution 925
- Care of Gold-Plated Connector Contacts 926
- Power Down Station Before Removing/Inserting Modules 926
- Validating Repairs 926
- Module Replacement 926
- Wireline 928
- ASTRO Modem Card/V.24 Interface Card 929
- Receiver 929
- Exciter 931
- Power Amplifier 932
- Power Supply 933
- Backplane 934
- Preselector Field Tuning Procedure 935
- 10 - Functional Theory of Operation 101
- 11 - Block Diagram, Schematics, Electrical Parts List, and Circuit Board Detail 111
- List of Tables
- List of Figures
- Parts Lists
- Foreword
- Safety and General Information
- Introduction
- System Applications
- Models and Specifications
- Approved Accessories
- Setup and Connections
- Operation
- Troubleshooting
- Introduction
- Recommended Test Equipment
- Troubleshooting Procedures
- Module Replacement Procedures
- Preselector Field Tuning Procedure
- Functional Theory of Operation
- Schematics
- Back Cover
68P81093C75-O November 30, 2000 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.
Figure 11 Chassis Ground Wiring Diagram
Output Input
Gnd
Neg
Pos
HN
Power Supply
AC Inlet
(Viewed from
Underside)
Chassis
Ground Stud
Ring Lugs
Nuts
Lock
Washers
GRN/YEL
GRN/YEL
BROWN
ORANGE
MAEPF-27099-O
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.
!