MCUmall EPROM BIOS Chip Burner Forum
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 Using The Enhanced/Dual power Willem Programmer
 another sst27sf512 + dual not working
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ronald55555

2 Posts

Posted - 08/08/2007 :  09:47:16  Show Profile  Reply with Quote
I have a willem dual power, 0.97ja, sst27sf512(brand new), correct cable that came with the burner, I cant erase nor burn.
I've followed the following jumper settings.

DIP 3 5 7 8 9 on(as in the pic in the program)
VPP jumper on bottom 2(normal)
jumpers set for pcb3b
JP1 and JP2 set at normal for when i try to read or burn
extra jumper on JP1 for erase
The 2 jumpers set at 12V(normal)
The jumper under that at 5V
using ac adapter, with jumper set accordingly




I've tried 5 different chips bought from xenocron, so it's unlikely all of them are bad. I also followed the instruction on xenocron
http://www.xenocron.com/install/Willem-SST.htm

Here's what i've tried:
start with a fresh chip, erase(with jumper in), pops up the "set jumper for W......", i hit ok, bar goes to 100%, says erase ok on the bottom. But when i do a blank check, it fails. I tried to burn it anyway, I unplugged everything, close problem, remove one of the jumper from JP1, load bin, hit burn, bar goes to 100%, but it gives me an error on the bottom offset0x0000.

I've also tried burning a brand new chip without trying to erase first, same error.

After i try to erase, I hit read, and looked at the buffer and it was not all FF, even though it said erase ok. so the blank check is right. I also tried to read a brand new chip, and it was not empty neither.

I also tried the test H/W tab and mesured the voltage according to instructons i found on another site, dont remember the exact numbers, but they were fine.

Anyone has any clue what's wrong?
Reply #1

ronald55555

2 Posts

Posted - 08/08/2007 :  09:49:31  Show Profile  Reply with Quote
forgot to mention, the lights light up fine, VPP and Power on, program would come on when i try to read erase or burn.

I tried to burn at offset 8000

also tried 0.98d6 w/ the 2 jumpers set at pcb3.5, same problems.
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