Motorola EP350

vi Table of Contents
5.4 Radio Tuning Setup ....................................................................................................................... 5-2
5.4.1 Initial Test Equipment Control Settings.............................................................................5-3
5.5 Transmitter Alignment Options ...................................................................................................... 5-3
5.5.1 Transmit High Power Tuning ............................................................................................ 5-3
5.5.2 Transmit Low Power Tuning ............................................................................................. 5-4
5.5.3 Transmit Modulation Tuning ............................................................................................. 5-5
5.5.3.1 Service Monitor Setting...................................................................................... 5-5
5.5.3.2 Transmit 12.5 kHz Modulation Tuning ............................................................... 5-6
5.5.3.3 Transmit 25 kHz Modulation Tuning .................................................................. 5-7
5.6 Receiver Tuning.............................................................................................................................5-8
5.6.1 Service Monitor Setting.....................................................................................................5-8
5.6.2 Receive 12.5 kHz-Band Normal Squelch Tuning..............................................................5-9
5.6.3 Receive 12.5 kHz-Band Tight Squelch Tuning ...............................................................5-10
5.6.4 Receive 25 kHz-Band Normal Squelch Tuning...............................................................5-11
5.6.5 Receive 25 kHz-Band Tight Squelch Tuning ..................................................................5-12
5.7 Utilities ......................................................................................................................................... 5-13
5.7.1 Program Serial No. .........................................................................................................5-13
5.8 Front Panel Programming............................................................................................................5-14
5.8.1 Introduction ..................................................................................................................... 5-14
5.8.2 Dealer and User Configurations...................................................................................... 5-14
5.8.2.1 Switching between Dealer and User Configurations........................................5-14
5.8.3 Entering Programming Mode .......................................................................................... 5-15
5.8.4 Exiting Programming Mode............................................................................................. 5-15
5.8.5 Accessing Front Panel Programming Mode Parameters................................................5-15
5.8.6 Editing Front Panel Programming Mode Parameters ..................................................... 5-16
5.8.7 Factory Reset..................................................................................................................5-23
Chapter 6 Maintenance – EP350 (Full Keypad Model) ..................... 6-1
6.1 Introduction ....................................................................................................................................6-1
6.2 Preventive Maintenance ................................................................................................................ 6-1
6.2.1 Inspection..........................................................................................................................6-1
6.2.2 Cleaning Procedures ........................................................................................................6-1
6.3 Safe Handling of CMOS and LDMOS Devices .............................................................................. 6-2
6.4 Repair Procedures and Techniques – General..............................................................................6-3
6.5 Disassembling and Reassembling the Radio ................................................................................6-6
6.5.1 Radio Disassembly – Detailed ..........................................................................................6-7
6.5.1.1 Front Housing From Chassis Disassembly........................................................ 6-7
6.5.1.2 Chassis Assembly Disassembly ......................................................................6-10
6.5.1.3 Front Circuit Board, Display Module and Keypad Disassembly.......................6-11
6.5.1.4 Speaker Disassembly ...................................................................................... 6-12
6.5.2 Radio Reassembly – Detailed......................................................................................... 6-13
6.5.2.1 Speaker Reassembly....................................................................................... 6-13
6.5.2.2 Front Circuit Board, Display Module and Keypad Reassembly ....................... 6-14
6.5.2.3 Chassis Assembly Reassembly....................................................................... 6-15
6.5.2.4 Chassis and Front Housing Reassembly.........................................................6-17
6.6 Torque List ...................................................................................................................................6-17
6.7 Mechanical View and Parts List ...................................................................................................6-18
6.7.1 EP350 (Full Keypad without Channel Knob) Exploded View and Parts List...................6-18
Chapter 7 Maintenance – EP350 (Limited Keypad Model)............... 7-1
7.1 Introduction ....................................................................................................................................7-1