There might be a diagram but I haven't seen any belt fitting diagrams at all, merely the odd exploded view. Replacing cassette belts is as much fun as a jigsaw puzzle - you keep removing screws and parts until you can fit the belt and then you reverse the process...
If you have a Sanyo waterproof camera, I will suggest you go through the user manual. You must need to read the whole manual to understand all the camera functions along with charging.
Reset Sanyo Tv without remote
Keep pressing the {MUTE} button until the TV powers on with the Service Menu displayed. Use the {CH+} {CH-} buttons to select menus. Use the {VOL+} {VOL -} buttons to change settings. Some menus might have sub-addresses.
https://hardmasterreset.com/how-to-reset-sanyo-tv/