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Crumbtrail TV Forums: TV Equipment: TV Repair Forum:
Sylvania LC195SLX

 
 


andreas13
New User

Nov 23, 2011, 1:01 AM

Post #1 of 7 (3005 views)
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Sylvania LC195SLX Can't Post
Unsure I have a Sylvania LC195SLX TV that emits a steady, high pitched squeal as soon as I plug it in. The screen is black and none of the lights come on. The powere button doesn't respond either. The squealing continues until I unplug the set. Does anyone have an idea what could be wrong? I've always liked this set and hate to throw it away if I can fix it for a reasonable price.



jts1957
Veteran


Nov 23, 2011, 1:21 AM

Post #2 of 7 (2995 views)
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Re: [andreas13] Sylvania LC195SLX [In reply to] Can't Post
First step is to open it up and look for anything unusual.


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Location: Far, Far Away


mel
Veteran

Nov 23, 2011, 4:01 AM

Post #3 of 7 (2991 views)
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Re: [andreas13] Sylvania LC195SLX [In reply to] Can't Post
Quite a while back, I had a Philips with a similar problem. Turned out to be a transformer or coil in the stanby power supply squeeling. Listen thru a piece of rolled up printer paper to isolate the source.


jts1957
Veteran


Nov 23, 2011, 4:32 AM

Post #4 of 7 (2989 views)
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Re: [mel] Sylvania LC195SLX [In reply to] Can't Post
I'd suspect either something shorted in the supply or something loading down the supply.

The set isn't working after all.Wink


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Location: Far, Far Away


andreas13
New User

Nov 23, 2011, 3:00 PM

Post #5 of 7 (2993 views)
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Re: [jts1957] Sylvania LC195SLX [In reply to] Can't Post
jts1957, mel,

Thanks! I'm going to open up when I get home tonight.


andreas13
New User

Nov 24, 2011, 7:03 PM

Post #6 of 7 (2976 views)
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Re: [jts1957] Sylvania LC195SLX [In reply to] Can't Post
jts1957,

I opened it up and everything looks normal. None of the caps are bulging or leaking. The set was manufactured in November '09.

mel,

I tried the newspaper trick and isolated the source of the noise to a yellow transformer on the back of the main board. The numbers on it are LTT2PC0XB044 and BCK-28-9923. It's within an inch of where the 110V power cord is soldered the main board. There is also a large capacitor 270uF 200wv within a 1/4" of the transformer.

I hope that helps.


mel
Veteran

Nov 24, 2011, 10:19 PM

Post #7 of 7 (2972 views)
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Re: [andreas13] Sylvania LC195SLX [In reply to] Can't Post
If it is the transformer plates vibrating against each other and the transformer is not encapsulated, sometimes just spraying it with clear acrylic spray will solve the problem.

 
 
 


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