Hi,
I recently purchased a Universal Willem EPROM programmer PCB5.0 off Ebay. I have not altered any voltage jumper settings and currently it is set to VPP 12.5 and VCC 5V. It burns 27C256 chips just fines with these settings. When I try a 27C2001 with the same settings I get a error. I have tried 6 times to get the chip to burn but with no success. All the pin jumper settings are correct for the 27C2001 chip. Should I try setting the VCC jumper at 6.2V when I get some new chips in? Any other suggestions. Thanks in advance for your help!
I recently purchased a Universal Willem EPROM programmer PCB5.0 off Ebay. I have not altered any voltage jumper settings and currently it is set to VPP 12.5 and VCC 5V. It burns 27C256 chips just fines with these settings. When I try a 27C2001 with the same settings I get a error. I have tried 6 times to get the chip to burn but with no success. All the pin jumper settings are correct for the 27C2001 chip. Should I try setting the VCC jumper at 6.2V when I get some new chips in? Any other suggestions. Thanks in advance for your help!