I had the ON/OFF switch go bad in my T.V. , I want to fix it myself.?

Question

It has a bad ON/OFF switch , I have a used switch... any thing I need to worry about if i try to solder it in ?

I know what a capacitor is , I work on welders witch contain banks of capcitors. I also know "ignoance + electricity = dead people". So i'm looking for info before I stick my hands where they don't belong .

Answer 1

The majority of late model T.V.'s have the user switches soldered to the front edge of the chassis, which is the large circuit board in the cabinet bottom. They are thru-hole parts, meaning there are holes in the circuit board through which the switch leads and mounting tabs go. Removing the switch is a matter of removing the solder, and then lifting the switch from the board. Use a wick to "soak the solder" from the connections, or a vacuum type desoldering tool if you have one. A VERY EFFECTIVE wick can be simply a length of shield stripped from a piece of coaxial cable, used in conjunction with some liquid or paste (non-acid) soldering flux. A good coax to use is RG-58/any suffix having a full braided shield. Most T.V. coax these days has a cheap foil shield that won't work for this. RG-58 is the stuff used with radios, such as CB.
Most dangerous voltages in a set will dissipate on their own after the set is unplugged for a few days. Capacitors lose their charge through internal leakage, as well as in bleeding through the connected circuitry. Be wary of the fat red lead that runs from the IHVT to the second anode connector at the top of the typical picture tube. That will bleed down too, but sometimes it may take more than a few days to completely dissipate. That may carry as much as 30,000 volts in operation. Be careful, take your time.
Consider too, those switches are pretty durable, and seldom fail unless abused. And there may be some other reason for failure here other than the switch. Such as the pushbutton in the front of the cabinet being physically broken, and just not contacting/pressing on the switch to actuate it.
If the switch is the old rotary-knob type, then the replacement considerations are more mechanical in nature. It will be connected with wires, just make an ACCURATE note of the wire placement/connections to the terminals before you begin.

Answer 2

Working on a T.V. by yourself can be a hazard especially for an amatuer. The T.V. has a very large capacitor to keep the electricity flowing enough for the picture. I wouldn't recommend doing it yourself, but if you decide to remember to avoid touching the projection area and look up online how a tv is put together because I don't recall off hand what it specifically looks like inside. Make sure of course to know what the capacitor is so you can avoid it.

Answer 3

There are some things called capacitors that may cause you a little problem. Definitely do not touch them!! Do you have the exact same switch as the one that failed? I don't take a chance since being "bitten" by a capacitor, and I usually don't back down from any challenge.

Answer 4

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Answer 5

Just make sure the other one is the same size and that you get it soldered in properly . Before you plug it back in check and make sure that the solder connections are good (making contact)

Answer 6

Please read everything the Batty Proffessor has said, he obviously knows what he talking about and is 100% correct