HP 8647A - Page 122

509
Description
Cause
What
To Do
510
Description
Cause
What To Do
511
Description
Cause
What To Do
Timebase calrestorefailure
After detecting a failure in comparing calibration data
between
RAM and the calibration ROM, a data restore
was attempted unsuccessfully.
There is either
a failure in writing data to RAM or in
reading data from the calibration
ROM.
The calibration ROM can be verified by replacing the
A4 assembly. The calibration
ROM is contained in the
module.
If the failure is still present after replacing the A4
assembly, replace the
A3 assembly, which contains
the
RAM.
Temperature calrestore failure
After detecting a failure in comparing calibration data
between
RAM and the calibration ROM, a data restore
was attempted unsuccessfully.
There is either a failure in writing data to
RAM or in
restoring data from the calibration
ROM.
The calibration ROM can be verified by replacing the
A7 assembly. The calibration
ROM is contained in the
module.
If the failure is still present after replacing the A7
assembly, replace the
A3 assembly, which contains
the
RAM.
TC coeff’s calrestose failure
After detecting a failure in comparing calibration data
between
RAM and the calibration ROM, a data restore
was attempted unsuccessfully.
There is either
a failure in writing data to RAM or in
reading data from the calibration
ROM.
The calibration ROM can be verified by replacing the
A7 assembly. The calibration
ROM is contained in the
assembly.
If the failure is still present after replacing the A7
assembly, replace the
A3 assembly, which contains
the
RAM.
Service Error Messages 5c-3