Need to know which optocoupler ic is used in str 6267 based power supply in sony trintron crt tv

Before replacing the switching output IC STR, you have to check all its associated components on board, especially low value resistors, and zener diodes. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
repair procedure of STR based power supplies, and circuit diagrams are given. Just type in the STR number in the search box at the right side to get gathered related posts.

No. Ofcourse not.

Most Sony's usually always have bad regulator ics. Depending on your model, could be a mcz3001 or str ic or mxoa ic. Check for 160v across the main capacitor for 160v to see if your power supply is working. Do not use chassis ground. Use the ground on the cap.

Sir I think there is a missing part in the part number of the str can you give me the complete part number thanks.

Every transformer used by Sony has a partnumber stamped on it, especially the larger power transformers. If you locate the number and run it through google, a number of suppliers will pop up.
Help yourself.

Hello
Check the input fuse first. If it is blown, there will be some short inside the power regulator circuit. Usually Sony sets uses STR regulated power supply. You can see this STR, and Ic, screwed onto a heatsink. Replace it with a same type and number. Before replacing the STR, check the diodes used in that section for damage, mainlu zener diodes. They might get shorted along the blowing of the STR. Check that section throughly before resoldering the new STR.
If any further assistance you needs, get me through Fixya. Ok.

Hello
Seven blinkings of stanbylight in Sony sets denotes a High-Voltage shutown problem. Not means the high line voltage, but the fault inside the tv itself. You haven't mentioned about the model number of your TV, yet I'm going to describe you considering this as a standard Sony problem.
The fault is mainly due to the internal power supply regulator section in your TV. It is now supplying voltage more than normal that it is meant for, as a result the EHT [Extra High Tension] voltage to the final anode of the picture tube goes higher than normal, and the microcomputer Ic inside your Tv detects this voltage difference and giving you the fault symptom in 7 continous blinks. That Ic is so programmed such, it will blink with certain times according to the fault comes inside, and helps us to locate the faulty section without opening the TV.
As I said above the fault in your TV lies on the power regulation section. You just open your TV and locate that section, which can be easly located as the main power just goes to that portion, and there will be a regulator normally Sony uses STR***** type IC regulators, which will be screwed onto a metal heatsink to radiate heat from it while it works. These will heat up to 80 degree C, while working, and the heat generated by this ic can cause loose solderings on its legs. You resolder its leg solderings, and suspected solderings around it, by applying a little more solder. In most cases this will resolve the problem. Ok.

850 rs

http://www.nodevice.com/manual/Sony.html

There are some IC's in the power supply that are going bad. This is a pretty complicated repair. You may want to have a repair shop check it out for you. Thanks