Motorola Gm1200e Detailled 68p64115b15 Manual

 
Introduction
Introduction1-1
 
1.0Introduction  
This chapter outlines the scope and use of the detailed service manual and provides an overview of 
the warranty and service support. 
2.0Scope of Manual 
This manual is intended for use by experienced technicians familiar with similar types of equipment. 
It contains level 3 service information required for the equipment described and is current as of the 
printing date. Changes which occur after the printing date maybe incorporated by a complete...

 
Warranty and Service Support
1-2Introduction
 
4.2After Warranty Period 
After Warranty period, Motorola continues to support products in two ways. 
Firstly, Motorolas Radio Parts and Service Group (RPSG) offer a repair service to both end users 
and dealers at competitive prices. 
Secondly, RPSG supplies individual parts and modules that can be purchased by dealers who are 
technically capable of performing fault analysis and repair. 
4.3Piece Parts 
Some replacement parts, spare parts, and/or product...

 
Control Head - Level 3 Information2-i 
Chapter 2 
Control Head - Level 3 Information 
Table of Contents 
Table of Contents 
Chapter 
2.1 Introduction/Theory of Operation
2.2 PCB/Schematic Diagram and Parts List 

 
Table of Contents
2-iiControl Head - Level 3 Information 

 
Introduction/Theory of Operation2.1-i 
Chapter 2.1 
Introduction/Theory of Operation 
Table of Contents 
Table of Contents 
Paragraph Page 
1.0 Overview  
.....................................................................................................  1  
2.0 Exploded View  Diagram  
............................................................................  2  
3.0 Theory of Operation  
..................................................................................  2
3.1 General...

 
Table of Contents
2.1-iiIntroduction/Theory of Operation 

 
Overview
Introduction/Theory of Operation2.1-1
 
1.0 Overview  
128 Channel, Keypad/Display Radio Control Head (Model K6) 
The features of the radio control head are as follows: 
n n 
On/Off Button 
n n 
Rocker type Volume Up/Down Control 
n n 
Volume Level Indicators (RSSI) 
n n 
Backlit Liquid Crystal Display (LCD) with display icons to show call progress and status 
n n 
Up/Down scrolling keys for the display 
n n 
Left/Right scrolling keys for the display 
n n 
3 x 4 CCITT Keypad  
n n 
Microphone...

 
Exploded View  Diagram
2.1-2Introduction/Theory of Operation
 
2.0 Exploded View  Diagram
3.0 Theory of Operation 
3.1 General 
The control head contains the microphone connector, several buttons to operate the radio, several 
indicator Light Emitting Diodes (LED) to inform the user about the radio status and a Liquid Crystal 
Display (LCD) with 19 pre - defined symbols, 11 bars and a 24x120 dot matrix for graphical or alpha 
- numerical information e.g. channel number, select code, call address name....

 
Theory of Operation
Introduction/Theory of Operation2.1-3
 
3.2 Power Supplies 
The power supply to the control head is taken from the host radio FLT A+ voltage via connector 
J0901 pin 2. The voltage FLT A+ is at battery level and is used for the LEDs, the back light, to power 
up the radio via On / Off button and to supply the voltage regulator circuit. The regulator circuit 
provides the stabilized +5 volt which is used for the microprocessor circuit, the display, the display 
driver and the keypad...

 
Theory of Operation
2.1-4Introduction/Theory of Operation
 
3.5 Microprocessor Circuit 
The control head uses the Motorola 68HC11E9 or 68HC11E20 (dependent on the used character 
set) microprocessor ( 
m 
P) (U0901) to control the LEDs, the LCD and to communicate with the host 
radio. RAM and ROM are contained within the microprocessor itself.
The clock generator for the microprocessor can use two different configurations:
1. The oscillator inside the microprocessor (U0901) along with a 4 MHz ceramic...