09/10, Secure Hardware Failure - Motorola ASTRO Digital Spectra Service Manual

Troubleshooting Charts
Fail 09/10
Secure Hardware
Failure
Verify connections
to secure module
through J801.
No
Connections
Repair opens.
good?
Yes
Replace module
Yes Is known
with known
good module
good one and
available?
retest.
No
Use ohmmeter to electrically
Radio
verify following signal
functions
No
connections to source IC:
with known
Signal @ J801
good
MOSI,MISO,SPI_SCK
module?
EMC_WAKEUP*
EMC_EN*
Yes EMC_REQ
Pins 6,21,22
Replace secure
Verify bias of following signals
module.
Signal@J801
UNSW_B+ 7.5VDC–1.0VDC
SW_B+ 7.5VDC–1.0VDC
GND
TECHNICAL PUBLICATIONS DEPT.
ASTRO SABER C.17 DWG. NO.
Chart C.17

09/10, Secure Hardware Failure

68P81076C25-C
Synopsis
This failure relates only to
secure equipped radios and
indicates a power up self-test
failure for the secure module.
More specifically this failure
indicates a failure in
communications between the
Host C and secure module.
The secure module is not
considered field repairable so
troubleshooting is limited to
verifying a problem with the
module and replacing. Typical
failure modes would be:
1) Open between secure module
and vocon board at J801.
2) The host C communicates
with the secure module via the
SPI bus (Refer to Fig. S1). A
failure of this bus.
3) Failure to get proper
supplies and grounds to J801.
Source
No
U204
Connections
connections.
U206
good?
U206
U206
GND
Yes
Nominal Bias
Verify electrical activity at the
following signals at power up:
Signal @ J801 Source
GND
MOSI,MISO,SPI_SCK U204
EMC_WAKEUP* U206
EMC_EN* U206
EMC_REQ U206
Replace
Yes
No
respective Replace secure
Signals
source IC or
good?
VOCON board.
Repair opens.
Replace module
with known
good one and
retest.
Radio
Repair
functions
with known
good
module?
Replace secure
module.
module.
MAEPF-24411-O
Fail 09/90
Secure Hardware
This failure relates only to
Failure
secure equipped radios and
indicates a power up self-test
failure for the secure module.
Verify connections More specifically this failure
to secure module indicates a failure in
through J801. communications between the
DSP and secure module. The
secure module is not considered
field repairable so
troubleshooting is limited to
verifying a problem with the
No
Connections
module and replacing. Typical
good?
failure modes would be:
1) Open between secure module
and vocon board at J801.
2) The DSP communicates with
Yes
the secure module via the
SCI/SSI bus (Refer to Fig. S1).
A failure of this bus.
3) Failure to get proper
Is known
Yes
supplies and grounds to J801.
good module
available?
No
Use ohmmeter to electrically
verify following signal
No
connections to source IC:
Signal @ J801 Source
EMC_RXD U405
EMC_TXD U405
Pins 6,21,22 GND
Yes
Verify bias of following signals
Signal@J801 Nominal Bias
UNSW_B+ 7.5VDC–1.0VDC
SW_B+ 7.5VDC–1.0VDC
Verify electrical activity at the
GND GND
following signals at power up:
Signal @ J801
EMC_RXD
Replace
No
respective
source IC or
VOCON board.
Chart C.18
5-13
Synopsis
No
Repair
Connections
connections.
good?
Yes
Source
U405
Yes
Signals Replace secure
good? module.
MAEPF-24412-O
09/90, Secure Hardware Failure
July 1, 2002