Electronics Repair Questions? Ask an Electronics Technician
Hi there and welcome
The manual for your TV you can access via my link below
Regarding the buttons on your Xfinity remote, you should be able to use it for your TV, it just depends on which remote you have been provided with. But go to my link below and follow the instructions to program your remote for your TV (as you need to program it but the link I am providing will step you through this).
Let me know please how you go