L60iF Issue 9 November 2018
21
A1.3 Changing the Eprom
Warning. These devices are static sensitive; operators should follow the appropriate procedure.
From time to time as upgrades and updates become available users may be offered the opportunity to
modify instrument firmware. This change is made by replacing the Eprom that carries the firmware program.
The procedure will be the same for each upgrade and is described here.
1.
Disconnect all power from the unit.
2.
Remove the six fixing screws holding the instrument case in position (two either side of the handle, two
on each side at the lower edge).
3.
Remove the case. The bottom edge should be eased out to facilitate removal.
4.
Identify the circuit board and the Eprom mounted on it (position labelled IC6). Drawing 9001-711 is
available illustrating this layout.
5.
The old Eprom carries a label which shows information as follows
L60iF Ver 1.02
0000 372D
These are the version number and checksum.
6.
Remove this Eprom with an appropriate tool.
7.
Ensure that the new Eprom carries the correct label, for example
L60iF 1.03
0000 9719
8.
Make sure that the pins are in line
9.
Insert the Eprom, ensure that the notch is away from the edge of the board and that no pins are bent.
10.
Press home firmly.
11.
Replace the lid of the case.
12.
Apply power. The Version should now read the updated value.