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Troubleshooting Charts
5-13
6881076C25-E
September 5, 2008
Chart C.17 09/10, Secure Hardware Failure
Chart C.18 09/90, Secure Hardware Failure
Signals
good?
No
Yes
Replace secure
module.
Replace
respective
source IC or
VOCON board.
Repair opens.
Fail 09/90
Secure Hardware
Failure
Verify connections
to secure module
through J801.
Connections
good?
No
Yes
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
DSP 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 DSP communicates with
the secure module via the
SCI/SSI bus (Refer to Fig. S1).
A failure of this bus.
3) Failure to get proper
supplies and grounds to J801.
Replace module
with known
good one and
retest.
Is known
good module
available?
No
Yes
Radio
functions
with known
good
module?
Replace secure
module.
Yes
Use ohmmeter to electrically
verify following signal
connections to source IC:
Signal @ J801
Source
EMC_RXD
U405
EMC_TXD
U405
Pins 6,21,22
GND
Verify bias of following signals
Signal@J801
Nominal Bias
7.5VDC–1.0VDC
SW_B+ 7.5VDC–1.0VDC
GND
GND
No
Connections
good?
Repair
connections.
Yes
MAEPF-24412-O
No
Verify electrical activity at the
following signals at power up:
Signal @ J801
Source
EMC_RXD
U405
Repair opens.
Fail 09/10
Secure Hardware
Failure
Verify connections
to secure module
through J801.
Connections
good?
No
Yes
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.
Replace module
with known
good one and
retest.
Is known
good module
available?
No
Yes
Radio
functions
with known
good
module?
Replace secure
module.
Yes
Use ohmmeter to electrically
verify following signal
connections to source IC:
Signal @ J801
Source
MOSI,MISO,SPI_SCK
U204
EMC_WAKEUP*
U206
EMC_EN*
U206
EMC_REQ
U206
Pins 6,21,22
GND
Verify bias of following signals
Signal@J801
Nominal Bias
7.5VDC–1.0VDC
SW_B+ 7.5VDC–1.0VDC
GND
GND
No
Connections
good?
Repair
connections.
Yes
No
Verify electrical activity at the
following signals at power up:
Signal @ J801
Source
MOSI,MISO,SPI_SCK
U204
EMC_WAKEUP*
U206
EMC_EN*
U206
EMC_REQ
U206
Signals
good?
No
Yes
MAEPF-24411-O
Replace secure
module.
Replace
respective
source IC or
VOCON board.
ASTRO SABER C.17
FAIL 09/10 SECURE HARDWARE
MAEPF-24411
TECHNICAL PUBLICATIONS DEPT.
DWG. NO.
Summary of Contents for ASTRO Digital Spectra
Page 2: ......
Page 6: ...September 5 2008 6881076C25 E iv Document History Notes ...
Page 20: ...xviii List of Tables September 5 2008 6881076C25 E Notes ...
Page 24: ...September 5 2008 6881076C25 E xxii CommercialWarranty Notes ...
Page 48: ...September 5 2008 6881076C25 E xlvi Model Numbering Charts and Specifications Notes ...
Page 142: ...September 5 2008 6881076C25 E 3 82 Theory of Operation Power Amplifiers Notes ...
Page 434: ...September 5 2008 6881076C25 E Glossary 10 Notes ...
Page 440: ...Index 6 September 5 2008 6881076C25 E Notes ...
Page 441: ......