Motorola M11URD6CB1_N Manuals

Manuals and User Guides for Motorola M11URD6CB1_N. We have 1 Motorola M11URD6CB1_N manual available for free PDF download: Service Manual

Motorola M11URD6CB1_N Service Manual

Motorola M11URD6CB1_N Service Manual (87 pages)

GTX LTR / Privacy Plus 800 MHz

Brand: Motorola | Category: Radio | Size: 2.3 MB

Table of Contents

Computer Software Copyrights
2
Table of Contents
3
Foreword

7
- Scope of Manual
  7
- How to Use this Manual
  7
- Technical Support
  7
- Service Policy
  7
- Ordering Replacement Parts
  7
- Model Charts
  8
- Accessories
  10
- Maintenance Speciﬁcations
  11
- Radio Model Numbering System
  13
Introduction

15
- Notational Conventions
  15
  - Warning
    15
  - Caution
    15
  - Note
    15
- Scope of this Manual
  15
- Safety Information
  15
- Air Bag Warning
  16
  - Vehicles Equipped with Air Bags
    16
- LP Gas Warning
  16
Basic Maintenance

17
- Introduction
  17
- Preventive Maintenance
  17
  - Inspection
    17
  - Cleaning
    17
  - Plastic Surfaces
    17
  - Circuit Boards and Components
    17
- Safe Handling of CMOS Devices
  17
  - Precautions
    18
- Repair Procedures and Techniques
  18
  - Parts Replacement
    18
  - Rigid Circuit Boards
    18
  - Chip Components
    18
    
    Chip Component Removal
    19
    
    Chip Component Replacement
    19
  - Over-Molded Pad-Array Carrier (OMPAC)
    19
    
    OMPAC Removal
    19
    
    OMPAC Replacement
    19
  - Shields
    19
    
    Shield Removal
    19
    
    Shield Replacement
    20
  - Replacement Oftransistor Q6505
    20
    
    Preparing Main Board for New Transistor
    20
    
    Removing Faulty Transistor
    20
    
    Installing Flange Capacitors C6567 and C6568
    21
    
    Positioning New Transistor
    21
    
    Reassembly of Radio
    21
    
    Soldering Transistor
    21
Test Equipment, Service Aids, and Tools

23
- Test Equipment
  23
- Field Programming
  24
- Service Tools
  25
Test Mode and Error Codes

27
- Front Panel Test Mode
  27
  - Test Mode/Entry
    27
  - Test Mode/Channel Selection
    27
  - Test Mode/Tx Modulation
    27
  - Fail Mode
    28
  - Exiting Test Mode
    28
Disassembly & Reassembly for 15 W Models

29
- Introduction
  29
- Disassemble the Radio
  29
  - Remove the Control Head
    29
  - Remove the Top Cover
    29
  - Remove the Main Board
    30
  - Disassemble the Control Head
    30
- Assemble the Radio
  31
Disassembly & Reassembly for 35 W Models

33
- Introduction
  33
- Disassemble the Radio
  33
  - Remove the Control Head
    33
  - Remove the Top Cover
    33
  - Remove the Main Board
    34
  - Disassemble the Control Head
    34
- Assemble the Radio
  35
Radio Tuning Procedure

37
- General
  37
- Service Menu
  37
- Tuning Procedure
  38
  - Starting the Tuning Procedure
    38
  - Alignment Default Data
    38
  - Tx Power
    38
  - Reference Oscillator Alignment
    38
  - Transmitter Power
    39
  - Transmit Current Limit
    39
  - Transmit Deviation Balance (Compensation) & Deviation Limit
    39
  - Transmit Deviation Limit
    39
  - Squelch
    39
  - Ending the Tuning Procedure
    40
Theory of Operation

41
- Introduction
  41
  - Overview
    41
- Receiver Detailed Functional Description
  42
- Transmitter Detailed Functional Description
  43
  - 15 Watt PA
    43
  - Power Control Circuitry
    44
    
    Current Limit
    44
    
    Power Set
    44
    
    Thermal Protection
    44
- Synthesizer Detailed Functional Description
  44
- Controller Detailed Functional Description
  46
  - General
    46
  - Voltage Regulators
    46
  - Electronic On/Off
    46
  - Mechanical On/Off
    46
  - Ignition
    47
  - Hook
    47
  - Microprocessor Clock Synthesizer
    47
  - Serial Peripheral Interface (SPI)
    47
  - SBEP Serial Interface
    47
  - Microprocessor (Open Controller)
    47
  - One-Time Programmable (Flash) Memory
    48
  - Electrically Erasable Programmable Memory (EEPROM)
    48
  - Static Random Access Memory (SRAM)
    49
  - Control Head
    49
- Controller Audio & Signaling Circuits
  49
  - General
    49
    
    Audio Ground
    49
    
    Audio Signalling Filter IC (ASFIC)
    49
  - Transmit Audio Circuits
    50
    
    Flat Tx Audio Input Path
    50
    
    MIC Input Path
    50
    
    PTT Sensing and TX Audio Processing
    50
  - Transmit Signalling Circuits
    51
    
    Dual Tone Multiple Frequency (DTMF) Data
    51
    
    High Speed Data
    51
    
    Sub-Audible Data (PL/DPL)
    51
  - Receive Audio Circuits
    52
    
    Audio Ampliﬁcation Speaker (+) Speaker
    53
    
    Audio Processing and Digital Volume Control
    53
    
    External Rx Audio
    54
    
    Handset Audio
    54
    
    Receive Signalling Circuits
    54
    
    Sub-Audible Data (PL/DPL) and High Speed Data Decoder
    54
    
    Accessory Connector Conﬁgurations
    55
    
    Alert Tone Circuits
    55
    
    Public Address
    55
    
    Remote Desk Set
    55
    
    External Alarm
    56
    
    RSSI Buffer
    56
Troubleshooting

57

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