SERVICE SECTION
136-174 MHz ORION
SYNTHESIZED TWO-WAY FM RADIO
TABLE OF CONTENTS
Page
DESCRIPTION...................................................................................................................... 2
INITIAL MEASUREMENTS................................................................................................. 2
TRANSMITTER....................................................................................................... 2
RECEIVER............................................................................................................... 2
MAINTENANCE................................................................................................................... 3
PREVENTIVE MAINTENANCE............................................................................. 3
DISASSEMBLY PROCEDURE................................................................................ 4
ALIGNMENT PROCEDURES............................................................................................... 7
INTRODUCTION..................................................................................................... 7
TRACKING DATA.................................................................................................. 9
TEST FREQUENCIES............................................................................................. 9
SETTING TRACKING DATA.................................................................................10
TRANSMITTER ALIGNMENT.............................................................................................11
PA TRANSISTOR REPLACEMENT.......................................................................11
RECEIVER ALIGNMENT.....................................................................................................12
TEST EQUIPMENT REQUIRED.............................................................................12
ADJUSTMENT PROCEDURES...............................................................................12
SQUELCH ADJUSTMENT......................................................................................13
TROUBLESHOOTING GUIDE .............................................................................................13
INTRODUCTION.....................................................................................................13
MICROPHONICS.....................................................................................................13
SERVICEABLE PARTS...........................................................................................14
DIAGNOSTIC PROCEDURES..............................................................................................15
ADDITIONAL TOOLS REQUIRED ........................................................................16
ERROR CODES.......................................................................................................19
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