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-   -   Old Mitsu 27" tube TV hums while off (http://www.diychatroom.com/f12/old-mitsu-27-tube-tv-hums-while-off-151116/)

raylo32 07-22-2012 06:45 AM

Old Mitsu 27" tube TV hums while off
 
I have an old tube TV in my kitchen eating area that works just fine... except it recently started humming after it gets turned off. So every time I turn it off now I unplug it. Is there an easy fix for this? I assume it needs a replacement relay or somesuch? I am fairly comfortable going in there and working on it having once upon a time gone in to jumper out the picture in picture based on a website how-to when it failed.

Any of you guys have the solution?

shumakerscott 08-26-2012 08:12 AM

Quote:

Originally Posted by raylo32 (Post 971462)
I have an old tube TV in my kitchen eating area that works just fine... except it recently started humming after it gets turned off. So every time I turn it off now I unplug it. Is there an easy fix for this? I assume it needs a replacement relay or somesuch? I am fairly comfortable going in there and working on it having once upon a time gone in to jumper out the picture in picture based on a website how-to when it failed.

Any of you guys have the solution?

Take a look at the capacitors in the power supply. If they are bulging then replace them. dorf dude...

raylo32 08-26-2012 08:37 AM

Thanks for the input. Where is the power supply typically located? I assume it is just a section on the circuit board?

Quote:

Originally Posted by shumakerscott (Post 996587)
Take a look at the capacitors in the power supply. If they are bulging then replace them. dorf dude...


gregzoll 08-26-2012 08:58 AM

Bad flyback transformer is what is causing the hum, not capacitors.

raylo32 08-26-2012 09:05 AM

Where is that located and are replacments available, OEM or generic?


Quote:

Originally Posted by gregzoll (Post 996609)
Bad flyback transformer is what is causing the hum, not capacitors.


raylo32 08-26-2012 09:23 AM

OK, I googled them and found a site that lists a bunch. I need to open my TV up and see what I have. But at these prices and depending on which one it is the TV may be "totalled".

http://www.technotronic-dimensions.com/Products2-2.html


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