Motorola APX 7500 - Emergency Alarm Decode; Wireline Interface

viii Table of Contents
September 9, 2011 68009482001
4.12.3.2 ACIM Inbound Command Handling........................................................................4-13
4.12.3.3 Extended Dispatch Operation ................................................................................4-15
4.12.4 Transmit Priority ..............................................................................................................4-16
4.12.5 Control Point Monitor.......................................................................................................4-17
4.13 Headset Operation (L999_ required)............................................................................................4-17
4.13.1 Connection ......................................................................................................................4-18
4.13.2 Receive Operation...........................................................................................................4-18
4.13.3 Transmit Operation..........................................................................................................4-18
4.14 PTT Footswitch (L999_ required).................................................................................................4-18
4.15 Crosspatch Operation ..................................................................................................................4-18
4.15.1 Connection ......................................................................................................................4-19
4.16 APCO Interface ............................................................................................................................4-20
4.17 Over-the-air Alert Tones Operation (L999_ required) ..................................................................4-20
4.18 Battery (AC Power Fail) Alert Tone Operation .............................................................................4-21
4.19 Revert to Low RF Power Operation .............................................................................................4-21
4.20 Recorder Operation......................................................................................................................4-21
4.21 External PA Operation..................................................................................................................4-22
4.21.1 Firehouse Day/Night switch.............................................................................................4-22
4.22 VIP Operation...............................................................................................................................4-23
4.23 External Speaker..........................................................................................................................4-23
4.24 Audio Jack....................................................................................................................................4-23
4.25 Crossmute Operation (L999_ required)........................................................................................4-24
4.25.1 Connection ......................................................................................................................4-24
4.26 Emergency ...................................................................................................................................4-25
Chapter 5 Maintenance.........................................................................5-1
5.1 Introduction.....................................................................................................................................5-1
5.2 Assembly and Disassembly Procedures ........................................................................................5-1
5.2.1 Top Cover..........................................................................................................................5-2
5.2.1.1 Removing the Top Cover .........................................................................................5-2
5.2.1.2 Replacing the Top Cover..........................................................................................5-2
5.2.2 Front Panel........................................................................................................................5-3
5.2.2.1 Removing the Front Panel........................................................................................5-3
5.2.2.2 Removing the Control Head (O5).............................................................................5-3
5.2.2.3 Replacing the Control Head (O5) .............................................................................5-4
5.2.2.4 Replacing the Front Panel........................................................................................5-4
5.2.3 Main Board........................................................................................................................5-4
5.2.3.1 Removing the Main Board........................................................................................5-4
5.2.3.2 Replacing the Main Board........................................................................................5-5
5.2.4 Mobile Radio .....................................................................................................................5-5
5.2.4.1 Removing the Mobile Radio .....................................................................................5-5
5.2.4.2 Replacing the Mobile Radio .....................................................................................5-6
5.2.5 Fan Assembly....................................................................................................................5-6
5.2.5.1 Removing the Fan....................................................................................................5-6
5.2.5.2 Replacing the Fan ....................................................................................................5-7
5.2.6 High Speed Board.............................................................................................................5-7
5.2.6.1 Removing the High Speed Board.............................................................................5-7
5.2.6.2 Replacing the High Speed Board.............................................................................5-8
5.2.7 Low Speed Board..............................................................................................................5-8
5.2.7.1 Removing the Low Speed Board..............................................................................5-8
5.2.7.2 Replacing the Low Speed Board..............................................................................5-9
5.2.8 Power Supply ....................................................................................................................5-9