Sony Trinitron picture/color issue


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Sony Trinitron picture/color issue

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ggoodell2
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Jan 20, 2010, 5:33 PM

Post #1 of 24 (3680 views)
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Sony Trinitron picture/color issue	Can't Post

i just got a 32" Sony Trinitron Model # KV-32FS120 for free and its got one issue. The picture below should explain what it does. everything else works fine. Is it fixable?
http://i143.photobucket.com/...tronics/102_4338.jpg
http://i143.photobucket.com/...tronics/102_4339.jpg

(This post was edited by ggoodell2 on Jan 20, 2010, 5:46 PM)

jts1957
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Jan 20, 2010, 10:02 PM

Post #2 of 24 (3674 views)
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Re: [ggoodell2] Sony Trinitron picture/color issue [In reply to]	Can't Post

Bad degaussing (needs: thermistor or solder joint), or TV was dropped (needs: Picture Tube). Wink

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Location: Far, Far Away

ggoodell2
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Jan 21, 2010, 2:32 AM

Post #3 of 24 (3665 views)
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Re: [jts1957] Sony Trinitron picture/color issue [In reply to]	Can't Post

i assume the degaussing coil works since it makes the familar 'buzz' when i turn it on. i removed the back and everything internal looked fine. to my knowledge it was never dropped. i did take my wifes hair dryer and ran it around the screen like i had heard about before and where i had the motor of the hair dryer the discoloration went away but as soon as i moved the hair dryer it came back.

jts1957
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Jan 21, 2010, 3:18 AM

Post #4 of 24 (3663 views)
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Re: [ggoodell2] Sony Trinitron picture/color issue [In reply to]	Can't Post

Has the yoke moved?

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Location: Far, Far Away

ggoodell2
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Jan 21, 2010, 3:42 AM

Post #5 of 24 (3661 views)
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Re: [jts1957] Sony Trinitron picture/color issue [In reply to]	Can't Post

what/where is the yoke?

jts1957
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Jan 21, 2010, 4:05 AM

Post #6 of 24 (3653 views)
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Re: [ggoodell2] Sony Trinitron picture/color issue [In reply to]	Can't Post

http://www.jomac.net.au/.../CRT/Yoke%20coil.jpg

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ggoodell2
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Jan 21, 2010, 4:17 AM

Post #7 of 24 (3651 views)
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Re: [jts1957] Sony Trinitron picture/color issue [In reply to]	Can't Post

it didnt look like it moved when i had the back off.

another question.... i have heard that there are connections inside a tv/monitor that still have power even when it is unplugged. is this true and what can i touch and what should i not.

jts1957
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Jan 21, 2010, 4:35 AM

Post #8 of 24 (3649 views)
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Re: [ggoodell2] Sony Trinitron picture/color issue [In reply to]	Can't Post

Don't mess with the thick red wire (or cap on bell of tube).
http://www.stickycarpet.com/pinx/_images/md6.jpg

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Location: Far, Far Away

ggoodell2
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Jan 21, 2010, 5:19 AM

Post #9 of 24 (3645 views)
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Re: [jts1957] Sony Trinitron picture/color issue [In reply to]	Can't Post

what is that red wire?

jts1957
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Jan 21, 2010, 5:44 AM

Post #10 of 24 (3643 views)
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Re: [ggoodell2] Sony Trinitron picture/color issue [In reply to]	Can't Post

30,000 to 50,000 volts that can bite you. Wink

But, then again, better you than me. Smile

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(This post was edited by jts1957 on Jan 21, 2010, 5:45 AM)

ggoodell2
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Jan 21, 2010, 5:45 AM

Post #11 of 24 (3640 views)
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Re: [jts1957] Sony Trinitron picture/color issue [In reply to]	Can't Post

so about 1/10th the voltage of my tazer... whats the amps. amps kill, volts hurt.... right?

jts1957
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Jan 21, 2010, 5:56 AM

Post #12 of 24 (3634 views)
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Re: [ggoodell2] Sony Trinitron picture/color issue [In reply to]	Can't Post

The throwing your arm back reaction to the shock can also cause some damage. Angelic

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ggoodell2
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Jan 21, 2010, 6:43 AM

Post #13 of 24 (3628 views)
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Re: [jts1957] Sony Trinitron picture/color issue [In reply to]	Can't Post

yoke looks fine. <br>Heres more pics

http://i143.photobucket.com/albums/r159/vwabbitman/electronics/101_4340.jpg

http://i143.photobucket.com/albums/r159/vwabbitman/electronics/101_4341.jpg

http://i143.photobucket.com/albums/r159/vwabbitman/electronics/101_4342.jpg

http://i143.photobucket.com/albums/r159/vwabbitman/electronics/101_4343.jpg

http://i143.photobucket.com/albums/r159/vwabbitman/electronics/101_4344.jpg

http://i143.photobucket.com/albums/r159/vwabbitman/electronics/101_4345.jpg

http://i143.photobucket.com/albums/r159/vwabbitman/electronics/101_4346.jpg

http://i143.photobucket.com/albums/r159/vwabbitman/electronics/101_4347.jpg

(This post was edited by ggoodell2 on Jan 21, 2010, 6:51 AM)

jts1957
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Jan 21, 2010, 7:29 AM

Post #14 of 24 (3619 views)
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Re: [ggoodell2] Sony Trinitron picture/color issue [In reply to]	Can't Post

Follow degaussing coil (thick bundle of wire that usually wraps around the perimeter of tube) wires down to where they plug into a socket on the board. Check that the plug is plugged in and that the thermistor is intact and that the solder joints on foil side of the board at the same location look good.

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Location: Far, Far Away

mel
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Jan 21, 2010, 8:36 PM

Post #15 of 24 (3613 views)
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Re: [ggoodell2] Sony Trinitron picture/color issue [In reply to]	Can't Post

Once the CRT is degaused (hair dryer), the purity should stay OK until the set is moved. Otherwise, the symptoms you show appear to be the result of a shift in the shadow mask in the CRT which can result from a shrp jolt to the tube. This cannot be repaired short of changing the tube.

ggoodell2
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Jan 22, 2010, 4:33 AM

Post #16 of 24 (3603 views)
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Re: [mel] Sony Trinitron picture/color issue [In reply to]	Can't Post

so i should just throw the tv away?

jts1957
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Jan 22, 2010, 4:43 AM

Post #17 of 24 (3602 views)
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Re: [ggoodell2] Sony Trinitron picture/color issue [In reply to]	Can't Post

Have you checked solder joints/thermistor? Angelic

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ggoodell2
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Jan 22, 2010, 7:11 AM

Post #18 of 24 (3600 views)
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Re: [jts1957] Sony Trinitron picture/color issue [In reply to]	Can't Post

i have no idea what to check. i am familar with electronics but tvs im at a lose. i do know i can follow connections but knowing whats what is where im screwed. if it was a computer id have it fixed.

jts1957
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Jan 22, 2010, 7:28 AM

Post #19 of 24 (3598 views)
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Re: [ggoodell2] Sony Trinitron picture/color issue [In reply to]	Can't Post

Degaussing coil: http://mirrors.arcadecontrols.com/...degauss/degauss1.jpg

Thermistor: http://rocky.digikey.com/...016.51D%20SERIES.jpg or http://img.alibaba.com/...or_TV_degaussing.jpg

Extreme example of bad solder:

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ggoodell2
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Jan 22, 2010, 8:01 AM

Post #20 of 24 (3596 views)
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Re: [jts1957] Sony Trinitron picture/color issue [In reply to]	Can't Post

i hear the wierd noise of the degaussing coil when i turn it on when the tv is cold.

jts1957
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Jan 22, 2010, 8:29 AM

Post #21 of 24 (3595 views)
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Re: [ggoodell2] Sony Trinitron picture/color issue [In reply to]	Can't Post

Just because someone hears the sound of a train rolling through their town, that doesn't prove anything. It could be someone driving through town with his P.A. amplifier on imitating one. The nearest tracks are thirty miles away. Cool

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mel
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Jan 22, 2010, 11:23 PM

Post #22 of 24 (3587 views)
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Re: [ggoodell2] Sony Trinitron picture/color issue [In reply to]	Can't Post

YES

ggoodell2
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Jan 23, 2010, 7:16 AM

Post #23 of 24 (3577 views)
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Re: [mel] Sony Trinitron picture/color issue [In reply to]	Can't Post

so is there anything i can do instead of replacing the tube?

jts1957
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Jan 23, 2010, 7:00 PM

Post #24 of 24 (3574 views)
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Re: [ggoodell2] Sony Trinitron picture/color issue [In reply to]	Can't Post

Get a new television? Tongue

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