708 Appendix C Error Messages
This section discusses system error messages that may be displayed by the generator
from time to time.
Power-on self test messages
The integrity of the data stored in non-volatile memory is checked every time the generator
is turned on. The following tests are performed:
1. The system configuration memory is checked. The memory remembers what the
generator was doing when it was last powered down. The memory also stores all
system wide parameters such as calibration factors and the light meter size. It is also
checked to see if it is compatible with the current version of operating firmware. If
everything is in order, then the generator goes on to step 2.
Otherwise, a “System corrupt!” message is displayed for 2 seconds. This message is
immediately followed by a “Memory blank” message, which is displayed for 2 seconds
while the format memory is re-initialized. Memory initialization involves clearing the
entire non-volatile memory and loading it with factory default data. Any and all data
created or edited by the user will be wiped out. The calibration factors are restored to
the original values used at the factory to test and calibrate the unit. The generator then
continues with step 3.
Note: System corruption is rare, and may be an indication of a bad memory backup
battery or a damaged generator.
Note: If you update the firmware EPROM in your unit, your system will appear to be
corrupt at the next power-on.
2. The remainder of non-volatile memory is checked to see if any data has been corrupted
since the last time the generator was used. This check includes each of the 300 format
storage locations. All user created custom images and test sequences are also
checked. If no problems are found, the generator goes on to step 3.
If one (or more) items have been corrupted, a message containing a tally of the
defective items is displayed for 2 seconds. A message for two corrupted items is shown
here. Please note that the checking routine does not identify the types of items (format,