Motorola GM328 Manuals

Manuals and User Guides for Motorola GM328. We have 2 Motorola GM328 manuals available for free PDF download: Service Manual, Instruction Booklet

Motorola GM328 Service Manual

Motorola GM328 Service Manual (556 pages)

Brand: Motorola | Category: Radio | Size: 13.67 MB

Table of Contents

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15
- Safety Information
  9
  - Approved Accessories
    11
  - Additional Information
    11
  - Operational Warnings
    13
  - Table of Contents
    15
- Scope of Manual
  17
- Warranty and Service Support
  17
- Radio Model Information
  19
  - Maintenance
    21
- Introduction
  21
- Preventive Maintenance
  21
  - Inspection
    21
  - Cleaning
    21
- Safe Handling of CMOS and LDMOS
  22
- General Repair Procedures and Techniques
  22
- Notes for All Schematics and Circuit Boards
  25
  - Service Aids
    33
- Recommended Test Tools
  33
- Test Equipment
  34
Table of Contents

37
- GM328 Model (GCN6112_)
  39
- GM338 Model (GCN6114_)
  40
- GM398 Model (GCN6115_)
  41
- Theory of Operation
  
  43
  - Introduction
    43
  - Controlhead Model for GM328
    43
    
    Power Supplies
    43
    
    Power on / off
    43
    
    Microprocessor Circuit
    44
    
    SBEP Serial Interface
    44
    
    Keypad Keys
    45
    
    Status LED and Back Light Circuit
    45
    
    Microphone Connector Signals
    45
    
    Speaker
    46
    
    Electrostatic Transient Protection
    46
  - Controlhead Model for GM338
    46
    
    Power Supplies
    46
    
    Power on / off
    46
    
    Microprocessor Circuit
    47
    
    SBEP Serial Interface
    47
    
    Keypad Keys
    48
    
    Status LED and Back Light Circuit
    48
    
    Liquid Crystal Display (LCD)
    49
    
    Microphone Connector Signals
    49
    
    Speaker
    50
    
    Electrostatic Transient Protection
    50
  - Controlhead Model for GM398
    51
    
    Power Supplies
    51
    
    Voltage Regulator Circuit
    51
    
    Power on / off
    51
    
    Microprocessor Circuit
    52
    
    SBEP Serial Interface
    52
    
    Keypad Keys
    53
    
    Status LED and Back Light Circuit
    53
    
    Liquid Crystal Display (LCD)
    54
    
    Microphone Connector Signals
    54
    
    Speaker (Remote Mount Configuration Only)
    55
    
    Electrostatic Transient Protection
    55
- Troubleshooting Charts
  
  57
  - Controlhead GM328 Troubleshooting Flow Chart
    57
    
    On/Off
    57
    
    Microprocessor
    58
  - Controlhead GM338 Troubleshooting Flow Chart
    59
    
    On/Off
    59
    
    Microprocessor
    60
    
    Display
    61
    
    Backlight
    62
  - Controlhead GM398 Troubleshooting Flow Chart
    63
    
    On/Off
    63
    
    Microprocessor
    64
    
    Microprocessor (Cont.)
    64
    
    Microprocessor (Cont.)
    65
    
    Display
    66
    
    Keypad Backlight
    67
    
    Display Backlight
    68
  - Allocation of Schematics and Circuit Boards
    69
  - December
    89
Table of Contents

91
- Theory of Operation
  
  93
  - Controller Circuits
    93
    
    Overview
    93
    
    General
    93
    
    Radio Power Distribution
    94
    
    Electronic ON/OFF
    96
    
    Emergency
    96
    
    Mechanical ON/OFF
    97
    
    Ignition
    97
    
    Microprocessor Clock Synthesizer
    97
    
    Serial Peripheral Interface (SPI)
    98
    
    SBEP Serial Interface
    99
    
    General Purpose Input/Output
    99
    
    Normal Microprocessor Operation
    100
    
    FLASH Electronically Erasable Programmable Memory(FLASH EEPROM)1-10
    102
    
    Electrically Erasable Programmable Memory (EEPROM)
    102
    
    Static Random Access Memory (SRAM)
    102
  - Controller Board Audio and Signalling Circuits
    103
    
    General - Audio Signalling Filter IC with Compander (ASFIC CMP)
    103
    
    Transmit Audio Circuits
    103
    
    Transmit Signalling Circuits
    106
    
    Receive Audio Circuits
    108
    
    Receive Signalling Circuits
    111
    
    Voice Storage (Optional)
    112
- Troubleshooting Charts
  
  113
  - Controller Troubleshooting Chart
    113
Table of Contents

143
- Model Chart and Technical Specifications
  
  145
  - GM328/GM338/GM398 Model Chart
    145
  - Technical Specifications
    146
- Theory of Operation
  
  149
  - Introduction
    149
  - VHF (136-174 Mhz) Receiver
    149
    
    Receiver Front-End
    149
    
    Front-End Band-Pass Filters & Pre-Amplifier
    150
    
    First Mixer and High Intermediate Frequency (IF)
    150
    
    Low Intermediate Frequency (IF) and Receiver Back End
    151
  - VHF (136-174 Mhz) Transmitter Power Amplifier (PA) 25 W
    151
    
    First Power Controlled Stage
    152
    
    Power Controlled Driver Stage
    152
    
    Final Stage
    152
    
    Directional Coupler
    153
    
    Antenna Switch
    153
    
    Harmonic Filter
    153
    
    Power Control
    153
  - VHF (136-174 Mhz) Frequency Synthesis
    154
    
    Reference Oscillator
    154
    
    Fractional-N Synthesizer
    154
    
    Voltage Controlled Oscillator (VCO)
    155
    
    Synthesizer Operation
    156
- Troubleshooting Charts
  
  159
Table of Contents

189
- Model Chart and Technical Specifications
  
  191
  - GM328/GM338/GM398 Model Chart
    191
  - Technical Specifications
    192
- Theory of Operation
  
  195
  - Introduction
    195
  - UHF (403-470 Mhz) Receiver
    195
    
    Receiver Front-End
    195
    
    Front-End Band-Pass Filters & Pre-Amplifier
    196
    
    First Mixer and High Intermediate Frequency (IF)
    196
    
    Low Intermediate Frequency (IF) and Receiver Back End
    197
  - UHF (403-470 Mhz) Transmitter Power Amplifier (PA) 25 W
    197
    
    First Power Controlled Stage
    198
    
    Power Controlled Driver Stage
    198
    
    Final Stage
    198
    
    Directional Coupler
    199
    
    Antenna Switch
    199
    
    Harmonic Filter
    199
    
    Power Control
    199
  - UHF (403-470 Mhz) Frequency Synthesis
    201
    
    Reference Oscillator
    201
    
    Fractional-N Synthesizer
    201
    
    Voltage Controlled Oscillator (VCO)
    201
    
    Synthesizer Operation
    203
- Troubleshooting Charts
  
  205
Table of Contents

237
- Model Chart and Technical Specifications
  
  239
  - GM328/GM338/GM398 Model Chart
    239
  - Technical Specifications
    240
- Theory of Operation
  
  243
  - Introduction
    243
  - UHF (450-527 Mhz) Receiver
    243
    
    Receiver Front-End
    243
    
    Front-End Band-Pass Filters & Pre-Amplifier
    244
    
    First Mixer and High Intermediate Frequency (IF)
    244
    
    Low Intermediate Frequency (IF) and Receiver Back End
    245
  - UHF (450-527 Mhz) Transmitter Power Amplifier (PA) 25 W
    245
    
    First Power Controlled Stage
    246
    
    Power Controlled Driver Stage
    246
    
    Final Stage
    246
    
    Directional Coupler
    247
    
    Antenna Switch
    247
    
    Harmonic Filter
    247
    
    Power Control
    247
  - UHF (450-527 Mhz) Frequency Synthesis
    248
    
    Reference Oscillator
    249
    
    Fractional-N Synthesizer
    249
    
    Voltage Controlled Oscillator (VCO)
    250
    
    Synthesizer Operation
    251
- Troubleshooting Charts
  
  253
Table of Contents

277
- Model Chart and Technical Specifications
  
  281
  - GM338 Model Chart
    281
  - Technical Specifications
    282
- Theory of Operation
  
  285
  - Introduction
    285
  - Low Band Receiver
    285
    
    Receiver Front-End
    285
    
    Front-End Band-Pass Filters and Pre-Amplifier
    286
    
    First Mixer and High Intermediate Frequency (IF)
    286
    
    High Intermediate Frequency (IF) and Blanker Switches
    286
    
    Low Intermediate Frequency (IF) and Receiver Back End
    287
    
    Extender" (Noise Blanker)
    287
  - Transmitter Power Amplifier (PA) 60 W
    288
    
    Power Controlled Stage
    288
    
    Driver Stage
    289
    
    Final Stage
    289
    
    Antenna Switch
    289
    
    Harmonic Filter
    289
    
    Power Control
    290
    
    TX Safety Switch
    290
  - Frequency Synthesis
    291
    
    Fractional-N Synthesizer
    291
    
    Voltage Controlled Oscillator (VCO) and Buffers
    292
    
    Synthesizer Operation
    293
- Troubleshooting Charts
  
  295
Table of Contents

381
- Model Chart and Technical Specifications
  
  383
  - GM338 Model Chart
    383
  - Technical Specifications
    383
- Theory of Operation
  
  385
  - Introduction
    385
  - VHF (136-174 Mhz) Receiver
    385
    
    Receiver Front-End
    385
    
    Front-End Band-Pass Filters & Pre-Amplifier
    386
    
    First Mixer and 1St Intermediate Frequency (IF)
    386
    
    2Nd Intermediate Frequency (IF) and Receiver Back End
    387
  - Transmitter Power Amplifier (PA) 45 W
    387
    
    Power Controlled Stage
    388
    
    Pre Driver Stage
    388
    
    Driver Stage
    388
    
    Final Stage
    388
    
    Directional Coupler
    388
    
    Antenna Switch
    389
    
    Harmonic Filter
    389
    
    Power Control
    389
  - Frequency Synthesis
    390
Table of Contents

413
- Fractional-N Synthesizer
  423
- Reference Oscillator
  423
- Voltage Controlled Oscillator (VCO)
  424
- Synthesizer Operation
  425
- Troubleshooting Charts
  427
Table of Contents

449
- Model Chart and Technical Specifications
  
  451
  - GM338 Model Chart
    451
  - Technical Specifications
    451
- Theory of Operation
  
  453
  - Introduction
    453
  - UHF (450-520 Mhz) Receiver
    453
    
    Receiver Front-End
    453
    
    Front-End Band-Pass Filters & Pre-Amplifier
    454
    
    First Mixer and High Intermediate Frequency (IF)
    454
  - Transmitter Power Amplifier (PA) 40W
    455
    
    Low Intermediate Frequency (IF) and Receiver Back End
    455
    
    Power Controlled Stage
    456
    
    Pre Driver Stage
    456
    
    Pre-Driver Stage
    456
    
    Driver Stage
    456
    
    Final Stage
    456
    
    Bi-Directional Coupler
    456
    
    Antenna Switch
    457
    
    Harmonic Filter
    457
    
    Power Control
    457
  - Frequency Synthesis
    458
    
    Reference Oscillator
    458
    
    Fractional-N Synthesizer
    458
    
    Voltage Controlled Oscillator (VCO)
    460
    
    Synthesizer Operation
    461
- Troubleshooting Charts
  
  463
Table of Contents

485
- Model Chart and Technical Specifications
  
  487
  - GM338 Model Chart
    487
  - Technical Specifications
    487
- Theory of Operation
  
  489
  - Introduction
    489
  - UHF (403-470 Mhz) Receiver
    489
    
    Receiver Front-End
    489
    
    Front-End Band-Pass Filters & Pre-Amplifier
    490
    
    First Mixer and High Intermediate Frequency (IF)
    490
    
    Low Intermediate Frequency (IF) and Receiver Back End
    491
  - UHF (403-470 Mhz) Transmitter Power Amplifier (PA) 40 W
    491
    
    First Power Controlled Stage
    492
    
    Power Controlled Driver Stage
    492
    
    Final Stage
    492
    
    Directional Coupler
    493
    
    Antenna Switch
    493
    
    Harmonic Filter
    493
    
    Power Control
    493
  - UHF (403-470 Mhz) Frequency Synthesis
    494
    
    Reference Oscillator
    494
    
    Fractional-N Synthesizer
    495
    
    Voltage Controlled Oscillator (VCO)
    496
    
    Synthesizer Operation
    497
- Troubleshooting Charts
  
  499
Table of Contents

521
- Model Chart and Technical Specifications
  
  523
  - GM338 Model Chart
    523
  - Technical Specifications
    523
- Theory of Operation
  
  525
  - Introduction
    525
  - UHF (450-520 Mhz) Receiver
    525
    
    Receiver Front-End
    525
    
    Front-End Band-Pass Filters & Pre-Amplifier
    526
    
    First Mixer and High Intermediate Frequency (IF)
    526
    
    Low Intermediate Frequency (IF) and Receiver Back End
    527
  - UHF (450-520 Mhz) Transmitter Power Amplifier (PA) 40W
    527
    
    First Power Controlled Stage
    528
    
    Power Controlled Driver Stage
    528
    
    Final Stage
    528
    
    Directional Coupler
    528
    
    Antenna Switch
    529
    
    Harmonic Filter
    529
    
    Power Control
    529
  - UHF (450-520 Mhz) Frequency Synthesis
    530
    
    Reference Oscillator
    530
    
    Fractional-N Synthesizer
    530
    
    Voltage Controlled Oscillator (VCO)
    532
    
    Synthesizer Operation
    533
- Troubleshooting Charts
  
  535

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Motorola GM328 Instruction Booklet

Motorola GM328 Instruction Booklet (4 pages)

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