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Symptom:
Possible Cause:
What to Do:
Symptom:
Possible Cause:
What to Do:
Symptom:
Possible Cause:
What to Do:
Symptom:
Possible Cause:
What to Do:
Symptom:
Possible Cause:
What to Do:
1
It is recommended to record the values for Correlation Magnitude, Amplitude, and the results of the transmit
test for later reference
ADFM Technical Manual (January 2000)
Ancillary Data VXDR, VDD1, and VDC are outside the range
listed in section "Maintenance and Troubleshooting".
Batteries or Power Supply. ADFM Motherboard.
Replace batteries. Check power supply.
Replace Motherboard. Refer to section "Least Replaceable
Assembly Fault Isolation," page 6-6, and "Power," page 6-7 for
further information and trouble shooting.
Transmit Test Failure
Cabling between the Motherboard and the Electronics Unit's
rear panel Transducer Connector. Transducer Cable or
connectors. ADFM Motherboard.
Refer to section "Least Replaceable Assembly Fault Isolation,"
page 6-6.
"Loop Test Failure". An occasional loop test failure may be
normal since this is a statistical test. If the percentage of
loop test failures is large (>10%) a problem may have
arisen.
Transducer not connected properly, or defective. High
interference source. ADFM Motherboard.
Refer to section "Least Replaceable Assembly Fault Isolation,"
page 6-6.
Eliminate interference source
environment. From BBTALK type "PT3" followed by a CR. The
Correlation Magnitude at Lag 0 should be 255, at Lag 7 it
should be typically < 20. Also, the Amplitude should be typically
< 65. Otherwise it may indicate a high source of interference.
Replace Motherboard.
Any RAM Test failure.
ADFM Motherboard.
Replace Motherboard.
Clock Interrupt failed.
ADFM Motherboard.
Replace Motherboard.
.
ADFM Troubleshooting
1,
or shield transducer
page 6-5
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