Hardware reference guide

Chapter 5: Reinstalling The OS
Serial Download
Equipment Needed
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7535 Hardware Reference Guide
• Enter the Control Panel, select the System icon, and open the Properties
tab. The item for “WinCE Code” displays the datecode of the OS image.
• Hold down the 7535’s Scan, Blue and Enter buttons for 6 seconds. The
7535 boots into its boot loader and displays the datecode of the OS image.
5.2 Serial Download
This section explains how to replace the operating-system software image on a 7535
through a serial cable.
5.2.1 Equipment Needed
Replacing the software image serially requires the following items:
• The new software image. The software image can be obtained from Psion
Teklogix.
• A PC with an available serial connection.
• A 7535 Portable Docking Module (PDM), which has a serial port that con-
nects to the 7535’s console port.
• Serial communications software that can handle Y-modem file transfer.
• A serial cable. This cable, available as Psion Teklogix part number
9003659, has a 9-pin D-connector on both ends.
5.2.2 Upgrading The Software Image
The software image on a 7535 is upgraded by rebooting the device into the BooSt
bootloader, copying the OS image file to the 7535, then rebooting the device. The
7535’s boot loader loads and runs the new OS image file.
The new OS image file must be named 753xOS.img.
The following steps explain the process for upgrading the OS software image in a
7535 using a serial connection and a Portable Docking Module:
On the 7535...
1. Press and hold the Scan, Blue and Enter buttons simultaneously for six
seconds. The 7535 reboots to the BooSt bootloader and displays text
similar to the following: