Motorola CDM1250 Service Manual

Section 2: i
6881091C63-F
Section 2: Control Head Service Information
Table of Contents
Chapter 1 Overview
1.0 CDM750 / PRO3100 Model (GCN6112_).........................................................2:1-1
2.0 CDM1250 / PRO5100 Model (GCN6113_).......................................................2:1-1
3.0 CDM1550 Series / PRO7100 Model (GCN6114_)............................................2:1-2
4.0 Data Radio Series (GCN6116_) .......................................................................2:1-2
Chapter 2 Theory of Operation
1.0 Introduction .......................................................................................................2:2-1
2.0 Control Head (CDM750 / PRO3100) ................................................................2:2-1
2.1 Power Supplies............................................................................................2:2-1
2.2 Power On/Off...............................................................................................2:2-1
2.3 Microprocessor Circuit.................................................................................2:2-1
2.4 SBEP Serial Interface..................................................................................2:2-2
2.5 Keypad Keys ...............................................................................................2:2-2
2.6 Status LED and Back Light Circuit ..............................................................2:2-3
2.7 Microphone Connector Signals ...................................................................2:2-3
2.8 Speaker .......................................................................................................2:2-4
2.9 Electrostatic Transient Protection................................................................2:2-4
3.0 Control Head (CDM1250 / PRO5100 / CDM1550 Series / PRO7100) .............2:2-4
3.1 Power Supplies............................................................................................2:2-4
3.2 Power On/Off...............................................................................................2:2-4
3.3 Microprocessor Circuit.................................................................................2:2-4
3.4 SBEP Serial Interface..................................................................................2:2-5
3.5 Keypad Keys ...............................................................................................2:2-5
3.6 Status LED and Back Light Circuit ..............................................................2:2-6
3.7 Liquid Crystal Display (LCD) .......................................................................2:2-6
3.8 Microphone Connector Signals ...................................................................2:2-7
3.9 Speaker .......................................................................................................2:2-7
3.10 Electrostatic Transient Protection................................................................2:2-7
3.11 PassPort Trunking Controller Board (PTCB)...............................................2:2-8

Motorola CDM1250 Specifications

General

Display	Alphanumeric
IP Rating	IP54
Frequency Range	VHF: 136-174 MHz, UHF: 403-470 MHz
Signaling	PL, DPL, MDC1200, Quick Call II
Operating Temperature	-22°F to +140°F (-30°C to +60°C)
Power Output	VHF: 1-25W; UHF: 1-25W