Service manual

July 1, 2002 68P81076C25-C
4-10 Troubleshooting Procedures: ASTRO Spectra Plus Procedures
4.2 ASTRO Spectra Plus Procedures
This section will aid you in troubleshooting a malfunctioning ASTRO Digital Spectra Plus radio. It is
intended to be detailed enough to localize the malfunctioning circuit and isolate the defective
component.
Please review sections 4.1.1 Handling Precautions on page 4-1 and 4.1.2 Voltage Measurement and
Signal Tracing on page 4-2 before continuing. Also, for information on troubleshooting the RF board,
refer to Section 4.1.4 RF Board Troubleshooting on page 4-5.
4.2.1 ASTRO Spectra Plus Power-Up Self-Check Errors
Each time the radio is turned on the MCU and DSP perform some internal diagnostics. These
diagnostics consist of checking the programmable devices such as the FLASH ROMs and SRAM
devices. At the end of the power-up self-check routines any errors produced are recorded. If an error
exists, use the Customer Programming Software (CPS) from the RS232 bus on front and rear of the
radio to read the error code. Table 4-5 lists self-check error codes, describes the codes, and gives
the recommended corrective action.
Table 4-5. ASTRO Spectra Plus Power-Up Self-Check Error Codes
Error Code Description Corrective Action
01/02 FLASH ROM codeplug Checksum Non-Fatal
Error
Reprogram the codeplug
01/12 Security Partition Checksum Non-Fatal Error Send radio to depot
01/20 ABACUS Tune Failure Non-Fatal Error Turn radio off, then on
01/22 Tuning Codeplug Checksum Non-Fatal Error Send radio to depot
01/81 Host ROM Checksum Fatal Error Send radio to depot
01/82 FLASH ROM codeplug Checksum Fatal Error Reprogram the codeplug
01/88 External RAM Fatal Error --Note: Not a checksum
error
Send radio to depot
01/90 General Hardware Failure Fatal Error Turn radio off, then on
01/92 Security Partition Checksum Fatal Error Send radio to depot
01/93 FLASHport Authentication Code Failure Send radio to depot
01/98 Internal RAM Fail Fatal Error Send radio to depot
01/A2 Tuning Codeplug Checksum Fatal Error Send radio to depot
02/81 DSP ROM Checksum Fatal Error Send radio to depot
Most of the ICs are static-sensitive devices. Do not
attempt to troubleshoot or disassemble a board
without first referring to the following Handling
Precautions section.
!
C a u t i o n