Do you need this mod on your TIU’s that are not rev L?
Don't fix stuff that ain't broke.
This was for the Rev. L, and it was demonstrated by Adrian to be less than a perfect fix in his club environment.
The Rev. L changed something in the DCS carrier interface that made the 74ACT244 driver much more susceptible to voltage spikes. This results in one or more of the paralleled gates being blown and reducing the amplitude of the DCS signal. So far, the previous versions of the TIU have not had a bit problem with this chip being damaged.
So is there a certain Rev L date of manufacture or part number I should look for to get one that is the latest and has the service fix already, even though you say it isn't a perfect fix, but is better than a Rev L dated XXXX? I am in the market to get a new TIU so