Both chips are PLCC32 chips and both of them are AN28F512 on 94-95 PCMs and AN28F512 on the Event side of the 96-97 PCM and an AN28F010 on the Time side. Again, both PLCC32.
You heat up the chip from the top.

For repair, 90% of the time, just one of the chips goes bad, but if you want to do socketing, you'll have to remove both.

 

I haven't taken one apart yet, but how do you know which is the E side and the T side. (r they marked)

Not only that, when you take them out a program them, do I need 2 seperate files, one for each of them, or can I use the same file to program them both.

Not trying to be a nusance, just want to get all my stuff in order.

Thanks

David Moss

 

So were can we get the hex code for the chips?
Can the hex code be read off a good PCM?


Jeff D.

 

Sorry to bring back life to a long lost post(was doing some reserach)....but, I just have to comment on this. Madwolf and the few others that seem to know what they are doing...Im actually disappointed in your adivce for the removal and install of the chips. The only correct way to do it is to use a temperature, voltage and vaccume controlled soldering/desoldering station. The board, neighbor chips and even the flash chips themselves...do not appreciate all that intense heat(from the soldering tips espically but also the heatgun(which Im not sure that would be too bad) but the uncontrolled temperature tips, that can do some damage. With a good quality soldering/desoldering station...there is no need to use a heat gun and you can keep the temps within limits to prevent possible chip/board damage. I got mine from http://www.howardelectronics.com

I do agree with everything else involving not letting newbies attemp to fix their own PCM. It really does require some previous skill/practice and the correct tools to do the job. There are a few little tricks to like getting the chip legs into the solder in the correct places(without touching the next one) or running it together, and so on. Also, Itll be hard to sell/maket that kit for cheaper than people like myself(or madwolf) can do as a fix that will be guaranteed to work. Good luck either way(if your still doing this plan now...it has been over half a year since the last post on the post before now) Im a business guy meself and am always into cool ideas.