Chapter 6 Basic Troubleshooting
6.1 Introduction
This chapter contains error codes and board replacement procedures. If the board does not pass all
the performance checks in Chapter 3 or exhibits an error code listed below, then the circuit board
should be replaced. If repair requires knowledge of details of component level troubleshooting,
please send radio to a Motorola Service Center listed in Appendix B.
6.2 Replacement Back Cover Kit Procedures
Once a problem has been isolated to a specific board, install the appropriate service kit (See Model
Charts in Chapter 1), which is orderable. from Motorola Radio Products and Solutions Organization
at 1-800-422-4210.
If a board is replaced, it does not necessarily need to be retuned if it has been factory tuned. It
should however be checked for performance before being placed into service. Of particular concern
is the Bias DAC, which will need to be set for the appropriate final device bias current prior to keying
up the radio. If the bias is not properly set it may be possible to cause damage to the transmitter.
NOTE
To access the various connector pins, use the housing eliminator/test fixture along with the
diagrams found in this section of the manual. (See the section, "Service Aids" on page 2-2,
for the appropriate Motorola service aids and tools parts numbers.)
The Tuner Tool only allows the serial number of the blank board to be entered
once. Be very attentive during this procedure.
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