Service manual

A. Introduction to This Section
This section of the manual contains troubleshoot-
ing charts, error codes, a functional block diagram,
interconnect diagrams, and flexible circuit information.
This section will help you isolate a problem to the
board level. Board-level troubleshooting does not
attempt to isolate problems to the component level.
Component-level service information can be found in
the “ASTRO Digital SABER Portable Radios Detailed
Service Manual.” (Refer to “Related Publications Avail-
able Separately” list located in the front section of this
manual.)
NOTE
To access the various connector pins, use the
housing eliminator/test fixture along with the dia-
grams found in this section of the manual. (Refer to
the “Service Aids for Board-Level Troubleshooting”
table for the appropriate Motorola housing elimina-
tor/test fixture part number.)
B. Replacement Board Procedures
Once a problem has been narrowed down to a
specific board, it is important to get the customer’s
radio back in service as quickly as possible. This can
be done several ways:
1. Install a good board from your inventory into the
customer’s radio.
2. Order a replacement board from Worldwide Sys-
tem and Aftermarket Products Division at
1-800-422-4210.
3. Troubleshoot the defective board using the
“ASTRO Digital SABER Portable Radios Detailed
Service Manual.” (Refer to the “Related Publica-
tions Available Separately” list located in the front
section of this manual for the specific manual
number.)
C. Power-Up Error Codes
When the radio is turned on (power-up), the radio
performs cursory tests to determine if its basic elec-
tronics and software are in working order. Problems
detected during these tests are presented as error
codes on the radio’s display. The presence of an error
should prompt the user that a problem exists and that
a service technician should be contacted.
Self-test errors are classified as either fatal or non-
fatal. Fatal errors will inhibit user operation; non-fatal
errors will not. Use Table 15 to aid in understanding
particular power-up error code displays.
SECTION VIII. BOARD-LEVEL TROUBLESHOOTING
Table 15. Power-Up Error Code Displays
Note: If the corrective action does not fix the failure, replace the controller board.
Error Code Description Corrective Action
01/81 ROM Checksum Failure Reprogram the FLASH memory.
01/02 External EEprom Checksum Non-Fatal Error Reprogram codeplug.
01/82 External EEprom Checksum Failure Reprogram the codeplug.
01/88 RAM Failure - Note: not a checksum failure Turn the radio off, then on.
01/90 General Hardware Failure Turn the radio off, then on.
01/92 Internal EEPROM Checksum Failure Reprogram the codeplug.
02/10 DSP support IC checksum Non-Fatal Error Turn the radio off, then on.
02/81 DSP ROM Checksum Failure Reprogram the FLASH memory.
02/88 DSP RAM Failure - Note: not a checksum failure Turn the radio off, then on.
02/90 General DSP Hardware Failure Turn the radio off, then on.
(DSP startup message not received correctly)
25