Hardware reference guide

7535 Hardware Reference Guide 61
Chapter 5: Reinstalling The OS
USB Download
Upgrading The Software Image
The A end of the USB cable plugs into your PC and the smaller square
B end of the cable plugs into the portable docking module connected to
the 7535. When the USB connection is established, a new drive appears
on your PC named “Removable Disk”.
The 7535 displays the following line on the console:
nand0-0 removed
Command>
That part of the 7535’s flash memory which stores the operating-system
image and is normally accessible only by the bootloader has been dis-
mounted and made available to the bootloader’s USB driver.
The regular bootloader commands (1 and !) to load and run the main
operating system will not work, and will give an error that there is no
operating-system image available.
3. Rename the Software Image from the part number under which it was
provided (such as 1000428A1.img) to 753xOS.img.
4. Copy the file 753xOS.img to the “Removable Disk” drive on your
PC.
5. ‘Stop’ the Removable Disk drive.
Once the file copy has finished, the Removable Disk must be ‘stopped’
to properly save the new file. To do this, select the Unplug or Eject
Hardware icon in the system tray in the bottom right corner of your
PC, or use the Add/Remove Hardware option in the Control Panel
(follow the options to “Uninstall/Unplug a device”, and then
“Unplug/Eject a device”, then select the Mass Storage Device).
Important: If the Removable Disk is not stopped, the 7535 image could become
corrupt causing the terminal not to boot properly.
If this happens, you must boot the 7535 into BooSt, connect it to
your PC with the USB cable, and format the Removable Disk (right
click on the drive and select the Format option).