Motorola ASTRO XTL 1500 Detailed Service Manual page 15

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Figure 3-50. Boot RX and Boot TX Data Lines ........................................................................................3-75
Figure 4-1. Frequency Generator Unit DC Power Supply Distribution (VHF) ..........................................4-8
Figure 4-2. Frequency Generation Unit Block Diagram (VHF) ................................................................4-9
Figure 4-3. Waveform Representation During Programming of the LV Frac-N IC (U3751) ................... 4-11
Figure 4-4. Frequency Generation Unit DC Power Supply Distribution (UHF Range 1)........................4-13
Figure 4-5. Frequency Generation Unit Block Diagram (UHF Range 1)................................................4-14
Figure 4-6. Waveform Representation During Programming of the LV Frac-N IC (U5752) ...................4-16
Figure 4-7. Frequency Generation Unit DC Power Supply Distribution (UHF Range 2)........................4-19
Figure 4-8. Frequency Generation Unit Block Diagram (UHF Range 2)................................................4-20
Figure 4-9. Waveform Representation During Programming of the LV Frac-N IC (U5752) ...................4-22
Figure 4-10. Frequency Generation Unit DC Power Supply Distribution (700-800 MHz) .......................4-25
Figure 4-11. Frequency Generation Unit Block Diagram (700-800 MHz) ...............................................4-26
Figure 4-12. Waveform Representation During Programming of the LV Frac-N IC (U6751) ...................4-28
Figure 5-1. Main Board Test Points-Top Side ......................................................................................5-10
Figure 5-2. Main Board Test Points-Bottom Side ................................................................................5-10
Figure 5-3. Poor RX Sensitivity or No RX Audio (136-174 MHz)-Part 1 of 2......................................5-12
Figure 5-4. Poor RX Sensitivity or No RX Audio (136-174 MHz)-Part 2 of 2......................................5-13
Figure 5-5. RX IF-Poor SINAD or No Audio (136-174 MHz) ..............................................................5-14
Figure 5-6. RX Back-End-Poor SINAD or No Audio (136-174 MHz)-Part 1 of 3..............................5-15
Figure 5-7. RX Back-End-Poor SINAD or No Audio (136-174 MHz)-Part 2 of 3..............................5-16
Figure 5-8. RX Back-End-Poor SINAD or No Audio (136-174 MHz)-Part 3 of 3..............................5-17
Figure 5-9. Low or No RX Injection Signal (136-174 MHz) ...................................................................5-18
Figure 5-10. Low or No TX Injection Signal (136-174 MHz) ...................................................................5-19
Figure 5-11. TX or RX VCO Unlock (Fail 001) (136-174 MHz)-Part 1 of 2...........................................5-20
Figure 5-12. TX or RX VCO Unlock (Fail 001) (136-174 MHz)-Part 2 of 2...........................................5-21
Figure 5-13. No Output Power at TX Mode (136-174 MHz) ...................................................................5-22
Figure 5-14. No Output Power and IDC < 2A at TX Mode (136-174 MHz).............................................5-23
Figure 5-15. No 16.8 MHz Reference Oscillator Frequency (380-470 MHz and 450-520 MHz)............5-24
Figure 5-16. Poor RX Sensitivity or No RX Audio (380-470 MHz and 450-520 MHz)-Part 1 of 2 .......5-25
Figure 5-17. Poor RX Sensitivity or No RX Audio (380-470 MHz and 450-520 MHz)-Part 2 of 2 .......5-26
Figure 5-18. RX IF-Poor SINAD or No Audio (380-470 MHz and 450-520 MHz)-Part 1 of 2............5-27
Figure 5-19. RX IF-Poor SINAD or No Audio (380-470 MHz and 450-520 MHz)-Part 2 of 2............5-28
Figure 5-20. RX Back-End-Poor SINAD or No Audio (380-470 MHz and 450-520 MHz)-
Part 1 of 3 ............................................................................................................................5-29
Figure 5-21. RX Back-End-Poor SINAD or No Audio (380-470 MHz and 450-520 MHz)-
Part 2 of 3 ............................................................................................................................5-30
Figure 5-22. RX Back-End-Poor SINAD or No Audio (380-470 MHz and 450-520 MHz)-
Part 3 of 3 ............................................................................................................................5-31
Figure 5-23. Low or No RX Injection Signal (380-470 MHz and 450-520 MHz) ....................................5-32
Figure 5-24. Low or No TX Injection Signal (380-470 MHz and 450-520 MHz) .....................................5-33
Figure 5-25. No TX Audio (380-470 MHz and 450-520 MHz) ................................................................5-34
Figure 5-26. TX or RX VCO Unlock (Fail 001) (380-470 MHz and 450-520 MHz)-Part 1 of 2 ............5-35
Figure 5-27. TX or RX VCO Unlock (Fail 001) (380-470 MHz and 450-520 MHz)-Part 2 of 2 ............5-36
Figure 5-28. RF Power Amplifier (RFPA)-No or Low TX Power Output (380-470 MHz and
450-520 MHz)-Part 1 of 5.................................................................................................5-37
Figure 5-29. RF Power Amplifier (RFPA)-No or Low TX Power Output (380-470 MHz and
450-520 MHz)-Part 2 of 5.................................................................................................5-38
Figure 5-30. RF Power Amplifier (RFPA)-No or Low TX Power Output (380-470 MHz and
450-520 MHz)-Part 3 of 5.................................................................................................5-39
Figure 5-31. RFPA Power Control-No VGBIAS (380-470 MHz and 450-520 MHz).............................5-42
Figure 5-32. No 16.8 MHz Reference Oscillator Frequency (700-800 MHz) ..........................................5-43
Figure 5-33. Poor RX Sensitivity or No RX Audio (700-800 MHz)-Part 1 of 2......................................5-44
Figure 5-34. Poor RX Sensitivity or No RX Audio (700-800 MHz)-Part 2 of 2......................................5-45
Figure 5-35. RX IF-Poor SINAD or No Audio (700-800 MHz) ..............................................................5-46
June 15, 2005
List of Figures
6815854H01-A