Sony color TV model kv-c29 11d blown power supply ic and transist

It is not a transistor. It is an STR [Switching transistor Regulator]. Actually it is an IC, used at its power supply regulator section as main power switching regulator. Check this link to see its picture.

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The main fuse has probably blown indicating there is a power supply issue and there are any number of reasons why this can happen, but you will need a tv tech to troubleshoot the extent of the problem to find out if it can be repaired within reason.

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.

have you check power ic if okey your volteage is below 90v ac

I have not worked on your particular model. But, I have serviced many TV sets over the years. My answer will ge generic.

Check all the capacitors in the horizontal output stage and power supply areas for high ESR. All the caps that are out of spec must be changed.

The high voltage multiplier & flyback can also cause the fault you are having.

You have to consider that the DC voltages are not the only important spec that has to be met. There are also many power drive signals that work with reactive devices. If there is any defect in the critical areas there will be failures.

Jerry G.

Accroding to your model number:(KV-...) In sony tv units power supply porblems is very low unless a power surge.
You have to check these things.
1. Stand by 5V available or not
2.If stand by 5V available press power and check B+ is getting or not
3.If B+ available check Horzontal oscillation
4.May be H-out transistor or video amplifier is bad.

i think your color combination chip is not working. you may have to change the chip of color system.

Be sure to use an ORIGINAL Sony transistor and be sure to resolder the pins of the small horizontal driver transformer and all parts connected to and around it, and your set should be fine.

The most common problem with TV was the failure of the Horizontal Output Transistor, this will also damage 2 transistors in the power supply and a resistor in the power supply also. (From memory): Horizontal Output location # Q501, 2 power supply transistors Locations Q601, Q602, and resistor Location R607. Also solder the Horizontal drive transformer, you can find it by following the circuit board from the base of the Horizontal output. Some models used an IC instead of the 2 transistors in the powersupply, it will have six legs and check like 2 transistors. Good Luck.

Replace the capacitor and the resistor as well as the diode that feeds the b+ to the vertical IC.