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B KLN 94
Rev. 4, Jan/2003 10599I04.CDL Page 2-80
2.5 ERROR CODES
The KLN 94 provides numeric error codes and text messages for certain failures. The following
table may assist in identifying the root cause of these problems.
GPS Rec.
Error Codes
Definition Suggested Action
RCVR Hardware
Error: XXXX:
This message appears when the
KLN 94 fails a specific internal test
for the GPS receiver. The possible
error codes are described below:
RCVR Hardware
Error: 0002
ROM Failure: The ROM memory
has failed self-test.
Bad ROM. Return for service.
RCVR Hardware
Error: 0004
RAM Failure: The RAM memory
has failed self-test.
Bad RAM. Return for service.
RCVR Hardware
Error: 0008
Nonvolatile Memory Failure: The
battery-backed RAM has failed a
checksum test. Non-volatile
memory will be cleared.
It could be one of the following, in the order of
probability:
1. The battery-backup power to the GPS Receiver
was lost. This could be due to either a dead internal
battery or a bad connection on the cable to the
receiver.
2. The RAM memory is bad.
RCVR Hardware
Error: 0010
RF Failure: This means the
receiver is not sensing a proper RF
signal from the satellites/antenna.
It could be one of the following, in the order of
probability:
1. Coax open or shorted. Confirm the 5 volts at the
antenna end.
2. Bad antenna. Substitute the antenna or inject a
signal at the coax.
3. Bad Receiver Module in GPS. Substitute the
GPS unit or inject signal at the input.
RCVR Hardware
Error: 0080
ASIC Failure: The GPS Correlator
ASIC fails self-test.
It could be one of the following, in the order of
probability:
1. The flex cable between the Receiver and Main
Board may have come out of the socket in the GPS.
2. Bad ASIC on receiver module in GPS. Substitute
the GPS unit.