TIU question

Chuck, see this thread and Barry’s answer.

https://ogrforum.com/...iu-blinks-nine-times

Thanks Dan!

Is it a rev G?  If so memory chip bad.  G

@Chuck Sartor posted:

When you first power up a TIU, what does 9 blinks mean?

Like George says, it usually means it's a goner!  I've never been able to rescue one that had that symptom.

I have, seems like I am seeing more of them.  Got one on bench now.  G

George, how do you "rescue" those?

Is it a bad eeprom?  Back in the day that was the only way to indicate software load failure for many embedded products, start blinking a led or something.

It is the memory chip.  Pain in the you know what to remove and install, and an obsolete chip.  But they can be found and installed.  G

I always appreciated those nice lab tech ladies who would do that kind of work for us, hunched over a microscope with a soldering iron.

Yep, back when I was still working, I'd just take the board out to one of the rework stations and hand it to the tech with the part, a few minutes later I had it all fixed.

@GGG posted:

Is it a rev G?  If so memory chip bad.  G

how can you tell what rev..is it ?

On the bottom of the TIU there is a sticker.  If no sticker, it’s likely a “G”.

Thanks for checking me GRJ.  Meant to say “sticker with a revision on it”.

The "G" has an FCC sticker but no rev sticker.