On January 6, 2020 at 21:06, anicely said...
I recently bought one of these Sony TVs and was disappointed that it does not accept an ordinary mono 3.5mm cable. I looked at the manual, and it states that you need an RS-232C cable, which also is how the female input is labeled on the back of the TV. When you go into the setup menu on the TV, you have to select RS-232 control.
I have an MRF-350 and it's my understanding that this unit does not send out any RS-232 signals; only IR commands through the cables. So I am confused about why you are able to use the MRF-350 to control the Sony TV using a stereo cable (with or without the mono adapter).
I tried connecting the MRF-350 to my TV using a 3.5mm stereo cable, plugging it in only part way, and it does not do anything for me.
I think I understand your confusion. The TV actually has two different jacks on the back for external control. At the bottom, there is a "RS-232C" jack. This is not the proper jack to use with the MRF-350. You want to use the one all the way at the top right labeled "Remote IR In". Try plugging a stereo cable all the way into this jack and then partially plugging the other end into the IR port on the back of the MRF-350. It should work.
Last edited by Loraquest on January 7, 2020 13:40.
