5.13 Secure Hardware Failure - Motorola APX 7000 Detailed Service Manual

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Troubleshooting Charts: Secure Hardware Failure

5.13 Secure Hardware Failure

Use an ohmmeter to electrically verify the following secure

related signals on the controller board and the Vdd levels:

Use a voltmeter to measure voltaVerify electrical activity at

the following signal probre points at power up:

MACE_CODEC_FSYNC

MACE_CODEC_CLK

RED_RX_CODEC

Replace respective

source IC or

Controller Board

Fail 09/10 or 09/90 Secure

Hardware Failure

Use an oscilloscope to

measure a 4MHz clock

signal at R6113 –

ENC_CLK_4MHz

Signal Present?

Test point – F_SSIR_TXMACE

Test point – F_SSIR_RX_CDC

Signals good?

This failure relates only to secure

equipped radios and indicates a power

up self test failure for the secure

circuitry. More specifically this failure

indicates a failure in communications

between the DSP and the secure

circuitry. The secure circuitry is not

considered to be field repairable so

troubleshooting is limited to verifying a

problem with the secure circuitry and

replacing the controller if required.

Controller Board