I'm trying to track down a discrete On and Off codes for my Sanyo TV (CP21MF2 similar to a DS20425).

So far I haven't found any, so maybe if someone at least knows what IR Protocol this TV uses, I may be able to keep searching that way.

Thanks.

What type of universal remote do you have? Can you post a learned signal in Pronto Hex or other common format? (I know you can't learn the discrete signals you want, but any signal from the same device would identify the protocol).

All the Sanyo TV's I have data on use NEC1 protocol, device number 56. That includes the models AVM-2000, AVM-3257, DS25580 and DS25760.

Assuming your remote can be programmed with Pronto Hex, you could generate a complete set of 256 commands for NEC1:56 using the MakeHex program (probably you also want the IrPanels program) and test what each command does. If there are discrete functions, that should find them.

First, please find and read some of the warnings about sending IR commands of unknown meaning to your TV. Any explanation I give about HOW to do so, does not mean I'm advising that it is safe to do so.

Thanks for the heads-up on the protocol - I'll start looking around there.

I'm using a Harmony 659 - which the web software unfortunately can no longer show the learned code.

I also understand the dangers of trying 'random' remote controls - one of my friends managed to do a factory reset on his PVR (loosing all his recordings) whilst trying to hunt down some discrete codes.

Can it import Pronto Hex or some other public format? (I don't know much about Harmony).

Otherwise, what good does it do to know the protocol and the device number?

Another choice is to get an inexpensive OneForAll remote and try the 256 possible commands by keying in EFC numbers 000 through 255. Most OFA models have at least one of the NEC1:56 setup codes: 0045, 0154, 0208, 0339, 0847, 1142 or 1208. For keying in EFC numbers it doesn't matter which of those setup codes you use, they are all NEC1:56. An older OFA using 3-digit EFC numbers would be easier than a new one using 5-digit, but even with 5-digit you only need 00000 through 00255.

Yes it can import Pronto Hex - but we now have to email a request to customer support to add it to our profile. (We used to be able to add and see Pronto codes, but they took that away from us ! )

So now we don't get to 'see' any of the learnt commands, and have to send a request to get a manual code added.

From another thread (that I now understand is the same customer support process) I recall that they weren't willing to add a full set of 256 signals to a profile for discrete code searching.

You might want to try to convince them that their policy is stupid. (They should let the customers add signals themselves without taking up time for customer support).

The NEC1:56 signals in those CCF files are all in the range 0 through 31. Discrete codes are unlikely to exist, but if any extra codes do exist, they are more likely in the same 0 to 31 range.