Section 8: i
Section 8: VHF (136–174 MHz) 25–45 W Bipolar
Service Information
Model Charts and Technical Specifications
1.0 VHF (136–174 MHz) 25–45 W Bipolar Model Charts.......................................8:1-1
1.1 CDM Series Model Chart ............................................................................8:1-1
1.2 PRO Series Model Chart.............................................................................8:1-2
Theory of Operation
2.1 Receiver Front-End .....................................................................................8:2-1
2.2 Front-End Bandpass Filters and Pre-Amplifier............................................8:2-2
2.3 First Mixer and 1st Intermediate Frequency (IF) .........................................8:2-2
2.4 2nd Intermediate Frequency (IF) and Receiver Back-End ..........................8:2-2
3.0 VHF (136–174 MHz) 25–45 W Bipolar Transmitter Power Amplifier
3.1 Power Controlled Stage ..............................................................................8:2-3
3.2 Pre-Driver Stage..........................................................................................8:2-4
3.3 Driver Stage ................................................................................................8:2-4
3.4 Final Stage ..................................................................................................8:2-4
3.5 Directional Coupler......................................................................................8:2-4
3.6 Antenna Switch ...........................................................................................8:2-4
3.7 Harmonic Filter ............................................................................................8:2-5
3.8 Power Control..............................................................................................8:2-5
4.0 VHF (136–174 MHz) 25–45 W Bipolar Frequency Synthesis...........................8:2-5
4.1 Reference Oscillator....................................................................................8:2-5
4.2 Fractional-N Synthesizer .............................................................................8:2-6
4.3 Voltage Controlled Oscillator (VCO)............................................................8:2-7
4.4 Synthesizer Operation.................................................................................8:2-8
Troubleshooting Charts
1.0 Troubleshooting Flow Chart for Receiver .........................................................8:3-1
2.0 Troubleshooting Flow Chart for 45 W Transmitter............................................8:3-3
3.0 Troubleshooting Flow Chart for Synthesizer.....................................................8:3-5
4.0 Troubleshooting Flow Chart for VCO................................................................8:3-6
Summary of Contents for PRO Series
Page 1: ...CDM Series and PRO Series Two Way Mobile Radios Detailed Service Manual 6881091C63 F ...
Page 4: ...Notes ...
Page 6: ...Notes ...
Page 8: ...Section 1 ii 6881091C63 F Notes ...
Page 12: ...Section 1 1 4 Radio Model Information 6881091C63 F Notes ...
Page 22: ...Section 1 2 10 Notes For All Schematics and Circuit Boards 6881091C63 F Notes ...
Page 46: ...Section 2 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 78: ...Section 3 1 20 Controller Board Audio and Signaling Circuits Section 6881091C63 F Notes ...
Page 80: ...Section 3 2 2 Troubleshooting Flow Chart for Controller 6881091C63 F Notes ...
Page 84: ...Section 3 3 4 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 146: ...Section 3 3 66 Controller T6 T7 Schematics and Parts Lists 8471235L06 Notes 6881091C63 F ...
Page 152: ...Section 4 1 4 Technical Specifications 6881091C63 F Notes ...
Page 168: ...Section 4 3 8 Troubleshooting Flow Chart for VCO 6881091C63 F Notes ...
Page 172: ...Section 4 4 4 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 232: ...Section 5 1 4 Technical Specifications 6881091C63 F Notes ...
Page 242: ...Section 5 2 10 UHF Band 1 403 470 MHz 1 25 W Frequency Synthesis 6881091C63 F Notes ...
Page 296: ...Section 6 1 4 Technical Specifications 6881091C63 F Notes ...
Page 306: ...Section 6 2 10 UHF Band 2 450 512 527 MHz 1 25 W Frequency Synthesis 6881091C63 F Notes ...
Page 316: ...Section 6 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 352: ...Section 7 3 6 Troubleshooting Flow Chart for VCO 6881091C63 F Notes ...
Page 356: ...Section 7 4 4 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 458: ...Section 8 1 4 Technical Specifications Section 6881091C63 F Notes ...
Page 474: ...Section 8 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 496: ...Section 9 1 4 Technical Specifications Section 6881091C63 F Notes ...
Page 512: ...Section 9 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 530: ...Section 10 1 4 Technical Specifications Section 6881091C63 F Notes ...
Page 546: ...Section 10 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 564: ...Section 11 1 4 Technical Specifications 6881091C63 F Notes ...
Page 580: ...Section 11 3 8 Troubleshooting Flow Chart for VCO 6881091C63 F Notes ...
Page 582: ...Section 11 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 608: ...Section 12 1 4 Technical Specifications 6881091C63 F Notes ...
Page 624: ...Section 12 3 8 Troubleshooting Flow Chart for PassPort 6881091C63 F Notes ...
Page 626: ...Section 12 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Page 654: ...Section 13 1 4 Technical Specifications 6881091C63 F Notes ...
Page 672: ...Section 13 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...