User's Manual

Table of Contents v
6881094C31-C October 14, 2003
3.2.4.4 Display Module ...................................................................................................... 3-29
3.2.4.5 Keypad Module...................................................................................................... 3-30
3.2.4.6 Controls and Control Top Flex............................................................................... 3-30
3.2.4.7 System Clocks....................................................................................................... 3-31
3.2.5 VOCON Audio Paths ...................................................................................................... 3-32
3.2.5.1 Transmit Audio Path .............................................................................................. 3-32
3.2.5.2 Receive Audio Path ............................................................................................... 3-33
3.2.6 Radio Power-Up/Power-Down Sequence....................................................................... 3-33
3.3 Encryption Module ....................................................................................................................... 3-34
Chapter 4 Troubleshooting Procedures............................................. 4-1
4.1 Handling Precautions..................................................................................................................... 4-1
4.2 Recommended Service Tools........................................................................................................ 4-2
4.3 Voltage Measurement and Signal Tracing..................................................................................... 4-3
4.4 Standard Bias Table ...................................................................................................................... 4-4
4.5 Power-Up Self-Check Errors ......................................................................................................... 4-5
4.6 Power-Up Self-Check Diagnostics and Repair (Not for Field Use)................................................ 4-6
Chapter 5 Troubleshooting Charts ..................................................... 5-1
5.1 List of Troubleshooting Charts....................................................................................................... 5-1
5.2 Main Troubleshooting Flowchart.................................................................................................... 5-2
5.3 Power-Up Failure........................................................................................................................... 5-3
5.4 DC Supply Failure.......................................................................................................................... 5-5
5.5 Display Failure (NNTN4563, NNTN4819, & NNTN4717 VOCON Kits)......................................... 5-8
5.6 Display Failure (NTN9564) .......................................................................................................... 5-11
5.7 Volume Set Error ......................................................................................................................... 5-14
5.8 Channel/Zone Select Error .......................................................................................................... 5-15
5.9 Button Test .................................................................................................................................. 5-16
5.10 Top/Side Button Test ................................................................................................................... 5-17
5.11 VCO TX/RX Unlock ..................................................................................................................... 5-18
5.12 VOCON TX Audio........................................................................................................................ 5-19
5.13 VOCON RX Audio ....................................................................................................................... 5-21
5.14 RX RF.......................................................................................................................................... 5-23
5.15 TX RF (VHF)................................................................................................................................ 5-28
5.16 TX RF (UHF R1/700-800 MHz) ...................................................................................................5-31
5.17 Keyload Failure............................................................................................................................ 5-34
5.18 Secure Hardware Failure............................................................................................................. 5-35
Chapter 6 Troubleshooting Waveforms ............................................. 6-1
6.1 List of Waveforms .......................................................................................................................... 6-1
6.2 13 MHz Clock ................................................................................................................................ 6-2
6.3 16.8 MHz Buffer Input and Output................................................................................................. 6-3
6.4 32.768 kHz Clock Outputs............................................................................................................. 6-4
6.5 SPI B Data..................................................................................................................................... 6-5
6.6 Receive Serial Audio Port (SAP) ................................................................................................... 6-6
6.7 Receive Baseband Interface Port (RX BBP) ................................................................................. 6-7
6.8 Transmit Baseband Interface Port (TX BBP)................................................................................. 6-8