All Roku TVs support the Roku Voice Remotes (which pair via WiFi Direct), as well as the TV manufacturers IR remotes (Sanyo, in your case).
There are at least two IR code sets used by Roku TVs. Roku uses a different code set for its devices (excluding sticks, which don't support IR), but those are not used by Roku TV manufacturers. So neither a Roku Simple Remote (IR) nor a universal remote set to Roku will work.
There are at least two code sets that the various manufacturers uses on the TVs they build. If you want to use a third-party IR TV remote, you would need to know which code set to look for. While I'm not help with that, a couple of other users that regularly offer support here are much more familiar with that. @Tivoburkee is one, and he may offer guidance as to which code set to look for on a universal IR remote.
DBDukes Roku Community Streaming Expert Note: I am not a Roku employee.
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