Originally Posted by jmartin871
While attempting to up date the data base in my Chelton PFD, somehow a file in the boot up routine was corrupted. Now, when power is applied, the unit goes through the programmed start up routine, but when it is at the point of coming on line, it starts over again and never completes the start up.
Any suggestions would be greatly appreciated.
One caution when using the Chelton systems is to NEVER interrupt power to the devices when they are booting up and especially during the TESTING phase because doing so can corrupt critical files.
You can try the following:
Insert your data card and boot up to access the maintenance and update menu.
Select "View Log Files" [or a selection similar to that]. This should show you which file has been corrupted - it will have failed the CRC check.
Note that you can also find this information in the BIT_LOG.DAT file in the CODE subdirectory.
If the problem is one of the database files then trying the database update with a fresh download will probably solve the problem.
If the problem is one of the system files you will need to replace it with a backup if you have one. If you need a system file and do not have a backup you can PM me and I can send you one from my backups. However, I am not sure whether this will require you to reconfigure limits and calibrations since mine will be from a different airplane and system.
You will need a basic knowledge of DOS and a way to plug a keyboard into your Chelton to replace the offending system file.
You can learn quite a bit about your Chelton by browsing the website referenced above.
Hope this helps.