Motorola EP450 service manual Display Model Disassembly and Re-assembly

iv				Table of Contents
	5.4.3	Transmit Power Tuning			5-5
		5.4.3.1 To Perform Transmit High Power Tuning, do the following:			5-6
		5.4.3.2 To Perform Transmit Low Power Tuning, do the following:			5-6
	5.4.4	VCO Attenuation			5-7
		5.4.4.1 VCO Attenuation 25 kHz			5-7
		5.4.4.2 VCO Attenuation 12.5 kHz			5-8
		5.4.4.3 VCO Attenuation 20 kHz			5-8
	5.4.5	DTMF Deviation Tuning			5-9
	5.4.6	MDC-1200 Deviation Tuning			5-10
5.5	Receiver Tuning		...........................................................................................................................		5-10
	5.5.1	Rated Volume Tuning			5-11
	5.5.2	Squelch Tuning			5-12
		5.5.2.1	Manual Squelch Tuning		5-12
		5.5.2.2	Auto Tune		5-13
	5.5.3 RSSI System Level Tuning				5-13
	5.5.4	RSSI Display Tuning			5-14
5.6	Utilities	.........................................................................................................................................			5-14
	5.6.1	Program Serial No			5-14
	5.6.2 Temp Comp Data Read				5-14
	5.6.3 Temp Comp Data Write				5-14
5.7	Radio-to-Radio Cloning				5-14
Chapter 6		Display 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 EP450 Display Model Exploded View and Parts List				6-16
Chapter 7		Non-Display Model Disassembly and Re-assembly			7-1
7.1	Introduction				7-1
7.2	Preventive Maintenance				7-1
	7.2.1	Inspection			7-1

December 3, 2003 HKLN4215A