Question about Sony Bravia Xbr-46hx909 46" 3d 1080p Led-lcd Tv - 16:9 - Hdtv 1080p - 240 Hz
NEVER DROPPED/ NO WATER DAMAGE, BUT IT WAS MOUNTED ON THE WALL. ALWAYS IN A COOL AREA ONLY ON MAYBE 7-8 HRS A DAY MOST TIMES LESS.
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Posted on Jan 02, 2017
7 blinks on a sony indicate that high voltage has exceeded 33K and the set is going into safety shut down. Check your Horizontal and rgulator circuits. Something in those circuits are causing the increased voltage.Hope this helps let me know if I can help you further.
Posted on Jan 11, 2008
This could be a scan amplifier failure, and there is a loss of high voltage to the CRT. Part of the power supply may have also failed. In these sets, if the CRT emission goes low in emission, or the CRT goes defective, the bias supply to the CRT will go in to protect.
An experienced TV service tech can troubleshoot the set and give you an estimate for service. Considering the age of the set, the cost of service may not be worth it.
Posted on Jan 08, 2009
In cannot remember if this model of set uses on the CRT drive board a drive IC for the CRT colour channels, or if it uses descrete transistors. I have had component failure on this board that causes your description. The failure in your case would be with the red channel drive. Most of the time I had the semiconductors fail, and some of the support components.
Most of the time, a failure on this board is caused by some intermittant internal arching inside of the CRT. If this happens, the CRT is starting go defective.
Another cause of this fault is that the CRT is starting to go internaly shorted between the control grid and screen grid. As it heats up, the shorting becomes lower in resistance, and thus causes the pricture to go brighter until the protection turns it off. This would be with the red electron-gun.
With any failure with the CRT, the set is not worth to fix even if you can find a CRT for it.
Posted on Jan 09, 2009
SOURCE: picture won't come on
1. See the ugly red color bands on the television set? These can also occur in blue and green. We're going to fix these!
2. Front shot of the television. Their are two screw holes on the front of the unit near the edge of each side right next to the speaker grille.
3. Close up shot of the screw hold. It is covered by a plastic cover that has two tabs holding it in. Carefully pry them out with your flat head screwdriver. Do not apply too much pressure or you can break the tabs off. Once the covers are removed, unscrew the two screws with a Philips screwdriver.
4. To remove the cover, pull from the bottom of the front case and rotate towards you. Once you rotate it out, the top will disconnect and come loose. Do not pull it off, as there are cords attached. (see picture) Loosen the cables attached with the twist ties and set the front cover to the left side.
5. With the speaker grille and cover removed, you now need to remove the wood panel to expose the inner electronics on your Sony HD TV. To do this, remove the four Philips head screws from the panel. Then, pulling from the right, rotate the panel off and the electronics will be exposed.
6. This is a picture of the inner electronics of your Sony Rear-Projection High Definition television. The little black box towards the front of the unit is where we will concentrate our time as it is the control for the voltage & convergence adjustment.
7. When focused in on the controls, you want to concentrate on the bottom row for the voltage / ray gun projection adjustment. The colors are labeled below and from left to right are blue, green, and red. Choose the one that needs to be adjusted and turn ever so slightly with your Philips screwdriver to remove the lines. In my case, the red just needed to be turned 1/8 of a rotation to be back in adjustment. Do not turn to quickly or abruptly or you could possibly damage your TV by varying the voltage too quickly.
Posted on Mar 24, 2009
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