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I posted this a while ago, but it applies here, This is a common problem with the ITC222 chassis, I would check CP120, CP140, CP150 to see if they are bad I suspect CP150 is the one that is bad. Its value is 2200uf 16VDC. It is located on the same board as the IHVT and is in between the Heat sink in the middle of the board.
The wire comes out by pressing the two tabs in and pulling real hard, You will be happy to know that the replacement IHVT comes with a HV cable since 9 time out of 10 you end up damaging the IHVT cable connection. In any event before checking the IHVT I would suggest looking at CP150, CP120 and CP140 to see if they are puffy, since this is a common problem in this set.
This sounds like it could be a malfunction in the High Voltage section of the TV. The shutdown circuit is switching on and preventing the TV from turning on. This might be due to an excessive amount of current flow possibly caused by a shorted turn in the Integrated High Voltage Transformer (IHVT), or a shorted Horizontal Output Transistor (HOT). To test this you will have to unplug the TV set, and with a multimeter set to resistance, measure the resistance from the collector of the HOT to ground, If it reads 0 ohms then that is the problem (a shorted HOT). The next test which is of the IHVT is a little difficult because it requires removing the IHVT and doing a ring test. At this point I would like to suggest that you take the TV to a repair shop, because these next test might be difficult for someone who does not know electronics, and if you have no knowledge of electronics you may do more damage then good.
With that being said:
Remove the HV anode of the IHVT connected to the CRT by first using a large flathead screwdriver connected with a clip lead to the ground of the TV, by sliding the screwdriver under the rubber cap and releasing the clips. Then unsolder the pins on the bottom of the IHVT using a soldering iron and a suction type desoldering pump. when the solder is removed , pull the IHVT from the circuit board. locating the main primary winding connect it to the device that you are using to perform your ring test (I use a Sencore LC-102), when it is connected do the ring test and it should have at least 10 rings to be considered good, any less then 10 and the IHVT is to be considered as bad.
Check to see if the Horizontal Output Transistors (HOT) collector lead is shorted to ground, this can be done by taking an ohmmeter reading between the collector and ground. If the transistor is shorted, that could be one of your problems, the other problem could be a defective IHVT (Integrated High Voltage Transformer). You will need to do a ring test to see if the IHVT is good.
This indicates a problem in the power supply either the low voltage switching supply or the High voltage power supply. The sounds you hear is the shutdown circuit activating, I would not suggest that you try to repair this problem because of the dangers involved. I would suggest that you take it to a qualified TV repair shop. This problem should not cost you much, however it is the best choice for the problem you described.
I Just started to service one of these RCA ATC-010 chassis,I found a shorted Horizontal Output transistor 2SD-3402.
This could be just a failure of the transistor itself or the transistor failed because the flyback transformer has either shorted windings or internal diodes. These parts are not expensive,I suggest replacing both at the same time to save yourself future aggravation.
This is a flyback problem. Thomson will not honor the installation neither will RCA. This has been going on for years. RCA and Thomson technically parted company a few years ago, but because RCA still uses Thomson parts they often have problems getting these parts when they fail, so RCA leaves it up to the TV owner to get the set repaired at a third party shop. In addition to this the Thomson parts only have a 1year warranty from the date of manufacture of the set, so it is possible for you to buy a RCA TV with Thomson parts that are out of warranty before you take it out of the store. Sad but true, the only recourse is to try to get RCA to service the set, provided that it malfunctions within the first year of purchase. I would suggest that you all take these TVs to a qualified TV repair shop to get them repaired, however, make sure the shop uses the exact OEM parts (This is important) because there are parts that come close to the original, but you or the TV shop would have to spend hours adjusting focus and screen voltages to allow the new part to work.
This sounds like something best handled by an experienced tech since the fix involves extreemly high voltages nearby, If you have a very good knowledge of the inner workings of tv's then ask for more information.
If you blew the fuse, the TV would do absolutely nothing - no lights, no sounds, nothing. It could be that the loud zapping noise you heard was the high voltage transformer arcing or shorting out. This could have caused the horizontal output transistor to short, and the set will not start as a result. You should have the set serviced by a qualified tech.