MCUmall EPROM BIOS Chip Burner Forum
MCUmall EPROM BIOS Chip Burner Forum
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dmitry

3 Posts
Posted - 10/29/2005 :  05:21:38  Show Profile
Dual power, AT27C256, verified all jumper settings, yet every time I program, it gets to about 37%, and then gives this error.

Help!
Reply #1

LC

4 Posts
Posted - 01/11/2006 :  23:31:04  Show Profile
Are you trying different chips? If you are, I recommend connecting the 9V external adapter. Mine would not work without it. Blank checks always failed without the external power.
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Reply #2

ZLM

2945 Posts
Posted - 01/16/2006 :  15:16:07  Show Profile
If you try different chip but failed in same address, then I'll say the addrress line may have contact issue. Check the 3 address chips on the programmer, if any loose condition. You can swap them see if the failed address changes.
Edited by - ZLM on 01/16/2006 15:16:30
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