Re: Sony Bravia KDL-52W5150 - Are These Symptoms Of A Bad T-Con?
Yes, TV has been power cycled several times with the same results.
So I'm thinking either the T-CON for left side is bad or the left side LCD Panel is bad.
Thoughts?
NoEcm
Member
Last Activity: 06-07-2012, 04:44 PM
Joined: 03-07-2012
Location: Seattle, WA
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Re: Sony Bravia KDL-52W5150 - Are These Symptoms Of A Bad T-Con?
Using a can of freeze spray, I thought I could isolate the problem board or component. I slowly sprayed a board and waited a few minutes to see if the results would appear, then moved to the next board. Nothing. Than 30 minutes later, something new showed up on the screen. Picture is now washed out with 4 vertical grey stripes on the left side:
And if I disconnect the T-Con ribbon cable that feeds the right side of the TV so that there is only a feed to the left side:
...Last edited by NoEcm; 05-25-2012, 07:50 AM.Leave a comment:
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Re: Sony Bravia KDL-52W5150 - Are These Symptoms Of A Bad T-Con?
I pulled the caps you suggested and tested them both hot and cold. All tested good but I replaced them anyway since they wer already out.
Still having the same problem(s) as described in the above postings.
At this point, would my next step be to simply replace the T-Con (~$60 or so)?...Leave a comment:
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Re: Sony Bravia KDL-52W5150 - Are These Symptoms Of A Bad T-Con?
Well, due to heat scatter it appears that I was heating the wrong part. In order to be sure that I was heating the correct component, I found a 3/16" pencil nozzle for my heat gun and some fiber paper that I used to contain the heat to a specific area.
Here is where the faulty part is:
And a closeup of it:
Part # MIP2H2 which is known as a Switching Regulator. Upon heating it, the Primary Voltage on the main board went up to ~12.06 volts.
...Leave a comment:
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Re: Sony Bravia KDL-52W5150 - Are These Symptoms Of A Bad T-Con?
Well, I was able to heat up the circled area with a heat gun and get the VCC up to 12.14 volts:
I might have been able to get the VCC up a little higher but was afraid to leave the heat on the board for too long.
Here is a closeup of the circled area:
Could it possibly be one of the Radial Caps that went bad?
1ea 100uf 35v
2ea 22uf 50v
Or should I be looking at something else? Or perhaps an adjacent area...Leave a comment:
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Re: Sony Bravia KDL-52W5150 - Are These Symptoms Of A Bad T-Con?
I unplugged the power cables between the Main Power Board and the two Inverter Boards.
Hooked a VOM to the Primary outputs on the Main Power Board. Upon turning the set on, the Voltage measured 11.60 volts (the markings on the board indicate that the VCC should be 12V).
Is 11.60V acceptable? or is that too low?Leave a comment:
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Re: Sony Bravia KDL-52W5150 - Are These Symptoms Of A Bad T-Con?
Took the back of the TV today and this is what I've discovered:
On the primary side of the power board, the 12volt VCC is only measuring ~11.60 volts or so. Is this an acceptable output? As a side note, all of the voltages on the secondary side of the board were perfect.
(also, all the CAPS on the power board looked fine visually)
Also, the high pitched noise. Its coming from the left side of the T-Con and only lasts ~10 - 15 seconds:
...Leave a comment:
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Re: Sony Bravia KDL-52W5150 - Are These Symptoms Of A Bad T-Con?
I'm thinking that this is the troubleshooting steps I should take after getting the back off?
1. Inspect the CAPs on the power board. Replace if necessary.
2. Measure the voltages on the power board (voltages should be marked on the board correct?)
3. Reseat the LVDS connector going into the T-Con
4. Reseat the ribbon cables on the T-Con
And somewhere in the above steps, try to re-create the problem using heat or freeze spray?
...Leave a comment:
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Re: Sony Bravia KDL-52W5150 - Are These Symptoms Of A Bad T-Con?
As a note, when the vertical lines start to appear there is a high pitch squeal coming from the TV.
After a while, the screen is covered with the vertical lines to the point where you cannot see the picture or images on the LCD screen, At that point, the high pitched squeal disappears.
Turn the TV off and then back on and the picture reappers. It may take 2 - 8 on/off cycles before the picture stabilizes and the TV can be watched all day.
Turn the TV off at night, and the...Leave a comment:
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Re: Sony Bravia KDL-52W5150 - Are These Symptoms Of A Bad T-Con?
Haven't had time to take the back of the TV yet (too many honey do's) but today I did the following:
Started the TV (took 3 on/off cycles to get a good picture) and let it run.
Ran good for 14 hours without a hiccup.
Decided to experiment. I Turned the TV off for 1 minute and restarted it. 8 on/off cycles later it worked perfectly again.
Going to have to get the back of the TV off sooner than later now.Leave a comment:
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Re: Sony Bravia KDL-52W5150 - Are These Symptoms Of A Bad T-Con?
Thanks, certainly looks like a T-Con issue based on your link. I'll open up the TV and look it over in the next week or two and post back....Last edited by NoEcm; 03-14-2012, 08:05 PM.Leave a comment:
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Re: Sony Bravia KDL-52W5150 - Are These Symptoms Of A Bad T-Con?
Yes, the menu shows exactly the same pattern as the 1st photo....Leave a comment:
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Sony Bravia KDL-52W5150 - Are These Symptoms Of A Bad T-Con?
Sony Bravia KDL-52W5150
2 Years Old (Out of Warranty)
Here is a photo with no signal input:
When I turn on the TV, this symptom may first appear or sometime up to 1/2 hour later.
If I turn the TV off, wait a few minutes and turn it back on, it works fine (may have to hit the on/off a couple of times before it works though).
When the picture goes bad, you can hear a very high pitched noise, otherwise, when the picture is working good, there is no noise.
Here is a picture with signal:
...
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