5.16 Secure Hardware Failure - Motorola APX 5000 Service Manual

Troubleshooting Charts: Secure Hardware Failure

5.16 Secure Hardware Failure

09/10 or 09/90
Secure Hardware Failure
Make sure the radio is fully assembled. These
errors will occur if vocon or expansion 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 Probe Point
VDD_IOP R2509
VDD_IOM R2511
VDDC R2512
Are voltage levels
correct?
Yes
Use an oscilloscope to verify clocks on expansion board:
Signal Probe Point
MACE CLOCK P2001_60
OPT_SSI_CLK P2001_44
OPT_SSI_FSYNC P2001_46
Are signals correct?
Yes
Use an oscilloscope to verify activity
during power-up on expansion board:
Signal
SSI_RED_RX_MACE
SSI_MACE_DIN
Are data signals
present?
Replace expansion
board.
equipped radios and indicates a power
troubleshooting is limited to verifying a
Level
1.875V
1.875V
1.875V
No Repair DC Voltage
Regulators
Frequency
4 MHz
1.5 MHz
8 KHz
Use an oscilloscope to verify clocks on VoCon board:
Signal
No
MACE CLOCK
SSI_OPT_CLK
OPT_SSI_SYNC
Probe Point
P2001_54
P2001_56
Use an oscilloscope to verify activity on VoCon board :
No
Signal
SSI_RED_RX_MACE
SSI_MACE_DIN
Yes
Synopsis
This failure relates only to secure
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
problem with the secure circuitry and
replacing the controller if required.
Probe Point Frequency
R6113 4 MHz
R6107 1.5 MHz
J4001_46 8 KHz
Probe Point
J4001_54
J4001_56
Check SSI clock
No
Are signals correct? signals from CPLD
and repair circuitry
Yes
Examine connection
between VoCon and
Expansion J4001 & P2001
Yes
Are data signals No
present?
5-33