Secure Hardware Failure - Motorola APX 3000 Detailed Service Manual

5-26
5.9

Secure Hardware Failure

Secure Hardware Failure
Make sure the radio is fully assembled. These
errors will occur if the Main boards are
not properly assembled. Also note a battery
removal and reattachment is needed after a
"Secure HW Upgrade" to clear errors.
Use an ohmmeter to electrically verify the following secure related
signals on the controller board and the Vdd levels:
Signal
VDD_IOP
VDD_IOM
VDDC
Use an oscilloscope to verify clocks on main board:
Signal
MACE CLOCK
OPT_SSI_CLK
OPT_SSI_FSYNC
Use an oscilloscope to verify activity on Main board :
Signal
SSI_MACE_DIN
09/10 or 09/90
Probe Point Level
R2509 1.875V
R2511 1.875V
R2512 1.875V
No
Are voltage levels
correct?
Yes
Probe Point Frequency
R6113 4 MHz
R6170 1.5 MHz
R2513 8 KHz
No
Are signals correct?
Yes
Probe Point
R6118
Troubleshooting Charts: Secure Hardware Failure
Synopsis
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.
Repair DC Voltage
Regulators
Examine data validity
Yes
Are data signals
present?
Check SSI clock
signals from CPLD
and repair circuitry
No