iv Table of Contents
Chapter 5 Troubleshooting Charts ..................................................... 5-1
5.1 List of Troubleshooting Charts ....................................................................................................... 5-1
5.2 Main Troubleshooting Flowchart.................................................................................................... 5-3
5.3 Power-Up Failure ........................................................................................................................... 5-4
5.4 DC Supply Failure........................................................................................................................ 5-15
5.5 Main Display Failure .................................................................................................................... 5-22
5.6 Volume/Channel Error ................................................................................................................. 5-23
5.7 Volume Set Error (APX 2000/ APX 4000 (Two Knobs)) .............................................................. 5-24
5.8 Channel Select Error (APX 2000/ APX 4000 (Two Knobs)) ........................................................ 5-25
5.9 Keypad Error................................................................................................................................ 5-26
5.10 Side Button Error ......................................................................................................................... 5-27
5.11 RX Audio Error............................................................................................................................. 5-28
5.12 TX Audio Error ............................................................................................................................. 5-30
5.13 Keyload/Secure Hardware/Memory ............................................................................................. 5-32
5.14 RX RF Failure .............................................................................................................................. 5-34
5.15 FGU Failure ................................................................................................................................. 5-45
5.16 VCO Failure ................................................................................................................................. 5-46
5.17 GPS Failure ................................................................................................................................. 5-52
5.18 Bluetooth Failure.......................................................................................................................... 5-53
5.19 PA Failure .................................................................................................................................... 5-59
Chapter 6 Troubleshooting Waveforms ............................................. 6-1
6.1 List of Waveforms .......................................................................................................................... 6-1
6.2 Clocks ............................................................................................................................................ 6-2
6.3 Audio SSI ....................................................................................................................................... 6-7
6.4 RX SSI ......................................................................................................................................... 6-11
6.5 TX SSI.......................................................................................................................................... 6-14
6.6 SPI ............................................................................................................................................... 6-17
6.7 I2C BUS ....................................................................................................................................... 6-19
6.8 One Wire...................................................................................................................................... 6-22
6.9 GCAI ............................................................................................................................................ 6-23
6.10 USB.............................................................................................................................................. 6-25
6.11 SDRAM ........................................................................................................................................ 6-27
6.12 FLASH CONTROL....................................................................................................................... 6-29
6.13 Receive Baseband Signals .......................................................................................................... 6-34
6.14 GPS ............................................................................................................................................. 6-35
6.15 Bluetooth Troubleshooting Waveforms........................................................................................ 6-38
6.16 Bluetooth Steady-State ................................................................................................................ 6-58
6.17 LF CW on Spectrum Analyzer ..................................................................................................... 6-63
Chapter 7 Troubleshooting Tables ..................................................... 7-1
7.1 List of Board and IC Signals .......................................................................................................... 7-1
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