Hooray.
My DTU-1701 is working again.
Couldn't access with my TL866A programmer.
Thinking Pukker, once you bought an USBasp.
With Extreme Burner software, hardware setting: Speed 500hz,
programming went fine.
Why, I don't know, but it worked.
Tested again with TL866A and that is working OK.
Happy me.
Unit works fine.
Madires and Indman, thanks for thinking with me,
much appreciated.
Indman, tqfp32 zif socket to DIP28 adapter,
haha, maybe in spare for later. Thanks.