Hello and welcome to justanswer.com my name is XXXXX XXXXX X'm here to help you with your TV problem.
Some of the Westinghouse chassis respond to the Sony codes so try 50 - 55.
Unfortunately the remote doesn't have a scan function so if these codes don't work then you'll have to try all of the codes in the list manually.
There are thousands of codes out there and remotes usually only come with a few hundred so if you don't want to use the original remote then all you can do is buy a universal remote with lots of codes in the database like the Logitech Harmony remotes.
Do you have the remote for the Westinghouse to verify that the speaker function is working?
How have you connected the Westinghouse TV to the Samsung?
Are you saying you don't have the original TV remote to make sure the TV screen setup works using a remote?
Are you connecting the TV to the Samsung using an optical connection (optic out on TV to Samsung optic in) or HDMI (TV HDMI output to Samsung HDMI input)?
Could you tell me the model of your TV so I can check it out but a lot of TVs don't output 5.1 to an external device. They only output stereo.
If you press the Dolby Pro logic on the Samsung can you hear the sound now coming from the wireless speakers?
Is the TX transmitter plugged into the back of the Samsung?
Is the mode on the Samsung set to 5.1? (see bottom of pg25 in your manual please)
If you follow pg60 and select the test tone can you hear the rear speakers?
Any setting will need to be done on the Westinghouse and the Samsung cannot trigger the Westinghouse. There is feature in the Samsung to control a Samsung TV (Anynet) but if the TV is not outputting 5.1 then it must be adjusted on the TV either using the Westinghouse remote (try this first) or if a code can be found for your other remotes. When you tell me the TV model I can give you more information.
The Samsung OSD (pg54) will appear on the TV screen in the same way the DVD menu appears on the TV when you put in a DVD. but you cannot select the audio setting for the TV there. That you have to do on the TV itself.