erasing/burning 27sf512 with enhanced willem burner
 

I was having trouble erasing my 27sf512 chips after burning them until i stubled accross some false information that led to my discovery of good information.

If i put a blank chip, never been burnt, in the burner and then erased, it worked fine, but if i programmed the chip i was unable to get them to erase. I found a thread on a camaro form to pull the safety jumper and set the eprom to W27C. This didn't work either, so on a hunch i reset the burner and just tried erasing with the jumper out and it worked.

So for those of you using enhanced buners with sst27sf512 chips: burn with safety jumper in, erase with safety jumper out.

Re: erasing/burning 27sf512 with enhanced willem burner
 

i've been having the same problem it keeps reading error. where is the safety jumper? it wont allow me to erase and re-write

Re: erasing/burning 27sf512 with enhanced willem burner
 

https://www.homemadeturbo.com/forum/...ish/search.gif

that button does wonders if clicked ;).

no but for real there is a few topics that explain it pretty good. just search for 27sf512.

Re: erasing/burning 27sf512 with enhanced willem burner
 

safety jumper is on the top between all the led's. Mine is yellow.