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 A.
6.2 Power-Up Error Codes
Upon powering up, the radio performs certain tests to determine if its basic electronics and software
are in working order. Any error detected has an associated error code that is presented on the radio
display. These error codes are intended to be used by a service technician when the radio
generates the Self Test Fail Tone. If these tests are successfully completed, the radio will generate
the Self Test Tone .
There are two classes of detectable errors, fatal and non-fatal. If it is considered as a fatal error, then
the normal radio operation will be inhibited. Fatal errors include hardware errors detected by the
microprocessor and certain memory errors. These memory errors include incorrect ROM checksum,
incorrect RAM checksum, and incorrect checksums of codeplug (Persistent Storage) blocks that
contain operating parameters. If the codeplug block operating parameters are corrupted, operation
of the unit on the proper frequency, system, and group are in question. Attempts to use this
information could provide the user with a false sense of security that others are receiving his
messages. Corrupted codeplug blocks of call IDs, or their associated aliases are considered non-
fatal errors. While the user may be inconvenienced, normal communication is still possible.
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.)
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