EPROM Eraser not erasing New EPROM

[Roger Heflin]

On Fri, 14 Apr 2000, 93 Formula wrote:

> And the saga (of the dim-whitted newbie) continues...
> 
> Any other ideas?  I pulled the factory sticker off and lined up the hole in 
> the eprom with a whole in the dataerase, and set the timer on max (24 
> minutes) 3 times (It wont run without the timer) It STILL hasnt erased it 
> according to the pocket programmer. Damn, could it be that these newer GM 
> chips are write once only? Or could I try something else. If nobody has any 
> other ideas, I may just have to try to erase my original 1993 chip instead. 
> They shouldnt call these memcals EPROMs if you cant write to them.
> Jeff.
> 

It there is a window it is an eprom.  Prom's don't have windows.   Are
you lining up the "window" with the hole the blue light comes out of?
If you aren't it will take much longer to erase things.   Also how far
away is the window from the light source,  it should be about 1/2" or
less, the closer the quicker it will erase.   I typically have had to
do at least 20 minutes erase a chip.

You are leaving the memcal cap off while you are erasing it right?

			Roger

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