5c-4
Service Error Messages
515 Freq Ext level cal restore failure
Description After detecting a failure in comparing calibration data between RAM and
the calibration ROM, a data restore was attempted unsuccessfully.
Cause There is either a failure in writing data to RAM or in reading data from
the calibration ROM.
What To Do The calibration ROM can be verified by replacing the A10 (freq ext)
assembly. The calibration ROM is contained in the assembly.
If the failure is still present after replacing the A10 assembly, replace the
A3 assembly, which contains the RAM.
516 Config cal restore failure
Description After detecting a failure in comparing calibration data between RAM and
the calibration ROM, a data restore was attempted unsuccessfully.
Cause There is either a failure in writing data to RAM or in reading data from
the calibration ROM.
What To Do Replace the A3 assembly. The A3 assembly has a continuity failure. The
calibration ROM is on the A3 assembly with the RAM.
517 Output prelevel cal restore failure
Description After detecting a failure in comparing calibration data between RAM and
the calibration ROM, a data restore was attempted unsuccessfully.
Cause There is either a failure in writing data to RAM or in reading data from
the calibration ROM.
What To Do The calibration ROM can be verified by replacing the A6 assembly. The
calibration ROM is contained in the assembly.
if the failure is still present after replacing the A6 assembly, replace the
A3 assembly, which contains the RAM.
518 Atten comp loss cal restore failure
Description After detecting a failure in comparing calibration data between RAM and
the calibration ROM, a data restore was attempted unsuccessfully.
Cause There is either a failure in writing data to RAM or in reading data from
the calibration ROM.
What To Do Replace the A3 assembly. The A3 assembly has a continuity failure. The
calibration ROM is on the A3 assembly with the RAM.
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