At 09:41 PM 5/3/97 +0000, you wrote:
>Hi folks,
>        I have attempted to erase my first jw part. It is a 16c63.
>I have placed the window about 2" from a 15w uv-b bulb for about
>2 hours. A subsequent read of the device shows that the program is
>still there. What am I doing wrong? Do I need a different type of
>eraser? Any help would be appreciated. Thanks.
>
>Jeff
>
Jeff,

If the program is still there keep trying. Move the 16C63 closer (very
close) to the UV source and check you have the right sort of UV. I don't
know what you meant when you said UV "bulb" but to us in Australia that
sort of suggests you have a incandescent "black light" and not the sort of
UV we want. Generally UV erasers are clear fluro "tubes" Hey, this might
just be a language thing. It appears "bulb" is commonly used in the USA
when I look at other piclist postings.

Anyway, after 2 hours something should be happening if your UV is good
unless...

If your part completely reads as '0000' then forget it. You have code
protected it and it won't erase.

If you are reading the program back then everything is ok. You just need to
get the UV situation sorted and the part will erase when that is done.

Good luck!

Jim