On December 20, 2006 at 20:30, ddarche said...
I have a doc from Teac, giving me codes for a device I
need to program.
It says "NEC format custom code 8520H" (which I assume
is hex.)
...
Just for study, I learned a Teac code for Play, from another
remote.
The code you learned is not for the device that the doc from Teac describes. I don't know whether you or Teac is confused about which model uses which signals, but one of you must be.
I've seen a bunch of examples where manufacturers said "NEC format" and it wasn't true. But in this case, even if they were wrong about "NEC", there is no way they would say "custom code 8520h" if they were talking about the signal you learned. It must be a different device with an unrelated set of IR signals.