Help with GQ-4x4 with ADP-054 adapter - burning 27C322 Roms

[Nic034]

I suggest to change first the eprom eraser for future use
Chinese eprom eraser can be dangerous for eyes and don't have security ! (be carefull for your eyes !)

I personnaly own this one below which works fine, but minimum erase time is 30min (prefer to perform 2x 30min on the eprom before using them) and sometimes more, not less.
Less time = more erasing failure rare. Do not put to much eprom in eraser, eraser light must be in front off the eprom glass.
old chips have sometime higher failure rate

https://gie-tec.de/product/tuv-exposure-boxes/?lang=en
in 4W or 35W UV LAMP model

 

[duffcon]

I was thinking about this thread recently and wanted to close the circle. After another issue with 16bit chips, I broke down and bought another ADP-054 v4.1 (my old one was 4.0) and everything worked without issue. So in this case, my other adapter was bad.