I want change the ic for remote sensor for Toshiba tv, model 32cz61. I want guidance in how to remove the infra red sensor?

Check the remote control for its infra-red emission. Check it with fresh batteries. If it is found OK, check and replace the infrared sensor inside the TV. If you wish to get some details; check the site linked here. It has details about how to check a remote control; by one among the post. Pull up older posts. http://electronicshelponline.blogspot.com/ If the remote control is found OK; check and replace the infra-red sensor inside the TV. Contact any service technician.

Check the remote control for its infra-red emission. Check it with fresh batteries. Check by pressing all the buttons on it; and see whether all of it generates infrared signal while pressing. If it is found OK, check and replace the infrared sensor inside the TV. If you wish to get some details; check the site linked here. It has details about how to check a remote control; by one among the post. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ If the remote control is found OK; check and replace the infra-red sensor inside the TV. Contact any service technician.
https://www.youtube.com/watch?v=F8oYoZslgbs LG Remote control - Open - Search [How to open LG Remote control]
https://www.youtube.com/watch?v=do41DlsZHmA [open, battery change Toshiba]
https://www.youtube.com/watch?v=jsSCNCW3IbQ [open and clean]
https://www.youtube.com/watch?v=Qp-l1uh-5gE [open and clean]

Check the remote control for its infra-red emission. Check it with fresh batteries. Check by pressing each button on it at a time; and see whether all of it generates infrared signal while pressing. If it is found OK, check and replace the infrared sensor inside the TV. If you wish to get some details; check the site linked here. It has details about how to check a remote control; by one among the post. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ If the remote control is found OK; check and replace the infra-red sensor inside the TV. Contact any service technician.

silly question: have you got batteries in remote replaced?

No. It could not be the reason. The parts might be of Sonys'; but the circuit will be of Technicas'. Its main system control IC should be concerned; not other parts. If you feel any difficulty in using the remote control, it might be of any other cause.
Check the remote control for its infra-red emission. Check it with fresh batteries. Check by pressing all the buttons on it; and see whether all of it generates infrared signal while pressing. If it is found OK, check and replace the infrared sensor inside the TV. If you wish to get some details; check the site linked here. It has details about how to check a remote control; by one among the post. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ If the remote control is found OK; check and replace the infra-red sensor inside the TV. Contact any service technician.

Check the remote control for its infra-red emission. Check it with fresh batteries. Check by pressing all the buttons on it; and see whether all of it generates infrared signal while pressing. If it is found OK, check and replace the infrared sensor inside the TV. If you wish to get some details; check the site linked here. It has details about how to check a remote control; by one among the post. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ If the remote control is found OK; check and replace the infra-red sensor inside the TV. Contact any service technician.

Check the remote control for its infra-red emission. If found OK, check and replace the infra-red sensor inside the TV. If you wish to get some details, check this link. http://electronicshelponline.blogspot.com/ Selecting the view option, either to Mosaic / Timeslide / Flipcard, can be selected by the drop-down list, at the top left of the display window, will make surf easy. You can also do a search, by type in the brand name / model number / IC used, in the search box at the top right of the display window.

Check the remote control for its infra-red emission first. If it is found OK, check and replace the infra-red sensor inside the TV. If you wish to get more details, check this link. http://electronicshelponline.blogspot.com/ Selecting the view option, either to Mosaic / Time slide, can be selected by the drop-down list, at the top left of the display window, will make surf easy. You can also do a search, by type in the brand name/model number/IC used, in the search box at the top right of the display window. Details about how to check a remote control is given.

you need to check the battery contact with the battery terminal make sure that the terminal is clean.

check open the cover of your remote and check the solder of the battery terminal from the pcb board use a soldering iron resolder it.

using your cellphone camera test the infra red emmision of your remote control aim the camera to the infra red of your remote.you must see at the screen of the camera that the infra red is lit when any button is pressed..if not the infra red is busted.

using your cellphone camera again to test the infra red emmision of your TV. Aim the camera to the infra red of your TV.you must see at the screen of the camera that the infra red is illuminating.if not the infra red sensor of the TV is busted.