10-1
Troubleshooting
Charts 10
Introduction to
This Section
This section contains detailed troubleshooting flowcharts. These
charts should be used as a guide in determining the problem areas.
They are not a substitute for knowledge of circuit operation and astute
troubleshooting techniques. It is advisable to refer to the related
detailed circuit descriptions in the theory section prior to
troubleshooting a radio.
List of
Troubleshooting
Charts
Most troubleshooting charts end up by pointing to an IC to replace. It
is not always noted, but it is good practice to verify supplies and
grounds to the affected IC and to trace continuity to the
malfunctioning signal and related circuitry before replacing any
IC. For instance, if a clock signal is not available at a destination IC,
continuity from the source IC should be checked before replacing the
source IC.
Chart 1. 800 MHz Radio Main........................................................ 10-3
Chart 2. VHF/UHF Radio Main........................................................ 10-4
Chart 3. Radio Power-up Fail.......................................................... 10-5
Chart 4. Bootstrap Fail ................................................................... 10-6
Chart 5. DC Supply Failure............................................................. 10-7
Chart 6. 01/81 Host ROM Checksum Failure.................................. 10-8
Chart 7. 01/82 or 002, External EEPROM Checksum Failure ........... 10-9
Chart 8. 01/84 SLIC Initialization Failure ...................................... 10-10
Chart 9. 01/88 MCU (Host µC) External SRAM............................. 10-11
Chart 10. 01/92, Internal EEPROM Checksum Failure..................... 10-12
Chart 11. 02/A0, ADSIC Checksum Failure..................................... 10-13
Chart 12. 02/81, DSP ROM Checksum Failure................................ 10-14
Chart 13. 02/88, DSP External SRAM FailureU414.......................... 10-15
Chart 14. 02/90, General DSP Hardware Failure............................. 10-16
Chart 15. 09/10, Secure Hardware failure ...................................... 10-17
Chart 16. 09/90, Secure Hardware Failure...................................... 10-18
Chart 17. Key Load Fail .................................................................. 10-19
Chart 18. Button Test..................................................................... 10-20
Chart 19. Keypad Error .................................................................. 10-21
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