Motorola PR400 - Manual (Page 6)

iv Table of Contents
July, 2004 6881096C24-A
5.3 Radio Tuning Setup ....................................................................................................................... 5-2
5.3.1
Initial Test Equipment Control Settings............................................................................. 5-3
5.4 Transmitter Alignment Options ...................................................................................................... 5-3
5.4.1
Reference Oscillator Warp................................................................................................ 5-3
5.4.2 Modulation Balance Attenuation ....................................................................................... 5-4
5.4.3 Transmit Power Tuning..................................................................................................... 5-5
5.4.3.1
To Perform Transmit High Power Tuning, do the following: .............................. 5-7
5.4.3.2 To Perform Transmit Low Power Tuning, do the following: - ............................. 5-7
5.4.4 VCO Attenuation ............................................................................................................... 5-8
5.4.4.1
VCO Attenuation 25 kHz.................................................................................... 5-8
5.4.4.2 VCO Attenuation 12.5 kHz................................................................................. 5-9
5.4.4.3 VCO Attenuation 20 kHz.................................................................................... 5-9
5.4.5 DTMF Deviation Tuning .................................................................................................. 5-10
5.4.6 MDC1200 Deviation Tuning (MDC radios only).............................................................. 5-11
5.5 Receiver Tuning........................................................................................................................... 5-11
5.5.1
Rated Volume Tuning ..................................................................................................... 5-12
5.5.2 Squelch Tuning ............................................................................................................... 5-13
5.5.2.1
Manual Squelch Tuning ................................................................................... 5-13
5.5.2.2 Auto Tune ........................................................................................................ 5-14
5.5.3 RSSI System Level Tuning ............................................................................................. 5-14
5.5.4 RSSI Display Tuning....................................................................................................... 5-15
5.6 Utilities ......................................................................................................................................... 5-15
5.6.1
Program Serial No. ......................................................................................................... 5-15
5.6.2 Temp Comp Data Read .................................................................................................. 5-15
5.6.3 Temp Comp Data Write .................................................................................................. 5-15
5.7 Radio-to-Radio Cloning................................................................................................................ 5-15
Chapter 6 Full Keypad Model Disassembly and
Re-assembly ........................................................................ 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 Disassembling and Re-assembling the Radio — General............................................................. 6-3
6.4.1
Radio Disassembly — Detailed ........................................................................................ 6-3
6.4.1.1
Front Cover From Chassis Disassembly ........................................................... 6-3
6.4.1.2 Dust Cover Disassembly.................................................................................... 6-6
6.4.1.3 Speaker and Microphone Disassembly ............................................................. 6-6
6.4.1.4 Keyboard Removal ............................................................................................ 6-7
6.4.1.5 PTT Disassembly............................................................................................... 6-7
6.4.1.6 Chassis Disassembly......................................................................................... 6-8
6.4.2 Radio Re-assembly - Detailed .......................................................................................... 6-9
6.4.2.1
Dust Cover Re-assembly ................................................................................... 6-9
6.4.2.2 Microphone and Speaker Re-assembly............................................................. 6-9
6.4.2.3 Keypad and LCD/Keyboard Re-assembly ....................................................... 6-11
6.4.2.4 Keyboard Retainer Re-assembly ..................................................................... 6-12
6.4.2.5 Chassis Assembly/Re-assembly...................................................................... 6-12
6.4.2.6 Chassis and Front Cover Re-assembly ........................................................... 6-13
6.4.2.7 PTT Re-assembly ............................................................................................ 6-15
6.5 Mechanical View and Parts List ................................................................................................... 6-16
6.5.1
PR400 Full-Keypad Exploded View and Parts List ......................................................... 6-16