Checking the coding function of the r/c, not something I do very often. Manufacturer's original for controlling amp,tuner and CD but with 3 different receivers, one for each separate, from one IR controller.
The ident "pulse" code for all button presses, was always 101 then one bit that alternated 0 or 1 on each successive keypress , whether the same key or another one, then its inverse as a bit, then 011 then 18 bit function code that was always consistent for the same button. What was this alternating fourth/fifth bit all about? it was normal function by the way
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on