Hi,

I'm looking for discrete ON/OFF IR codes for my DVD/SACD player Cambridge-Audio DVD89. I searched the forum and file area without success.

I found codes for the Oppo 970-HD (which is the same hardware as the Cambridge DVD89) but unfortunately the Oppo discrete ON/OFF codes do not work.

Best regards,

stipus

I just found that the Cambridge is the Oppo 971H (not 970-HD as I first thought).

And in the Oppo 971H faq, I just read:

Q: Is there a firmware update that will add discrete on/off remote codes to the OPDV971H so that I can use my universal remote control to turn on/off all my AV equipments at once?

A: Due to existing hardware limitation, it is impossible to add discrete on/off to the current OPDV971H via a firmware update. The reason is that the 971H hardware was designed to have a "true standby" mode. When the power is turned off using either the remote or the power button on the player, the entire DVD player shuts down. The main processor which is in charge of interpreting the remote code is turned off completely. The only circuits with power are the standby power supply and the IR sensor board. The IR sensor board can only interpret one remote code, which is the current ON/OFF code. When it receives this code, it turns on the main power supply thus bringing the player out from standby mode. Because the main processor is turned off in the standby mode, it is impossible to interpret a discrete on/off remote code with it.

So I'm out of luck...

That design doesn't stop them from adding a discrete Off by a firmware change. It just makes a discrete On much harder. Depending on some design details, even a discrete On might be possible.

If the processor can control the behavior of the power toggle command while it is on, then even discrete On is practical by adding a command that means "ignore the immediately following power toggle". That command followed by power toggle could be a discrete On because when the processor was off the IR sensor board can't ignore the power toggle and would turn on, but when the processor was on it could ignore the the power toggle.

Of course none of that means you're likely to convince them to make a firmware change they don't want to make.

I agree with you... a simple solution would be to keep the current "power on/off" code for on, then when the unit is running only another code would allow standby.

Drawback is that standby would not work anymore from their original remote.

Oppo is quite reactive to ideas and I have seen them implement special firmwares for their customers... but unfortunately Cambridge audio is not as reactive and won't do the same.