TV suddenly turned off and won't turn on for more than nSec.
Model is Actually a SRT2232X 32" TV (CRT).
(I think the "X" is just a chassis color option).
I am having a problem similar to other TV's.
Last night there was a loud pop, then it shut off.
I tried to turn it on again, and got an arcing (clicking) sound with a bright vertical signal centered on the CRT.
It looked like an audio wave form, but running top to bottem, possibly retrace?
Today, same symptoms.
I purchased PDF Schematic online last night.
Main Board = BL6509F01012-1
I discharged the CRT, removed main board and visually inspected it for obvious damage. Only R552 has slight discoloration on the PCB. Q552 may be damaged (not sure).
I suspect Q571 (H-Out), Q572 (H-Drive), Q551 and/or Q552 (H-Control).
Anyone had a similar problem with this PCB and fixed it?
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Re: TV suddenly turned off and won't turn on for more...
You are on the right track, a vertical line usually means that you lost horizontal deflection which is supplied by the horizontal/High voltage section.The thing that puzzles me is that you did not lose high voltage. Let me explain. In modern TVs the horizontal section uses scan rectification or a process similar to a switching power supply to convert a lower voltage tapped off of the hoizontal/HV section to provide B+ for the rest of the television. So if you lose your Horizontal voltage you lose your B+ also. So you will never see the vertical line because you low voltage power supply if off also.
Now I think your Q571 (H-Out), Q572 (H-Drive), Q551 and/or Q552 (H-Control) might be good.
However check them anyway. I would also advise you to check your yoke transformer for an open or shorted winding. This would cause you to lose deflection without losing high voltage.
You are definatly in the right section just add the deflection section to your scope of troubleshooting.
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been a long time since fixed an crt tv. but if you have a stand by light the problem on this model is the control chip if remember right it sits on the left side near to the front. think its an 8 pin chip. these just go and it will not turn on. these chips are easy to get hold of and are cheap. you just need to remove it and replace with a new one. and the tv will work again. its not on the power board but is controlling the power start up. if there is no stand by light its a longer problem to solve. it could be a number of problems. would need to know if any problems happened before the tv did not turn on.
Hello There is a fuse inside the power supply bard of your sylvania TV. Check whether it has blown out. If bllown out, replace it with same type bothe in size and amperage. If the newly inserted fuse also blow up as soon as you switch on the set, make sure that the power supply section has some short circuit in it, and should be cheked well. OK.
Wow that's interesting, was there anybody watching your home while you were gone? There is a possibility that someone simply turned down the color level with the color control? Check that first. It's an unusual symptom. With composite video, component video or HDMI it's not usually possible to experience that defect. Since the color (chrominance signal) is usually inseparable from the luminance (black and white signal) I would check the color setting first. Other wise your set has become unable to detect that color signal... I bet it's a setting rather than a defect.
some of those chassis develope small cracks or cold solder joints
should be resoldered in several areas know to have that problem
transformer pin connectors-heatsink transistors/ic's have to be checked
Is this the actual model # AV-32F475?
If so, sounds like you have a shorted color filament within the picture tube. Could also be a video output going bad, causing intermittent shutdown when the CRT's beam current reached overload.
Same problem. The power button does not work. The volume and channel buttons turn the tv on. the tv then shuts its self off 15 seconds later. the red light blinks in second intervals while this happens.
If still under warranty or if you have no electronic repair experience you should take the set back to the shop or to a repair person. Some of the solutions described below can be dangerous, TV's are very hazardous to service. Even when plugged out, TV's can store very high voltages.
Generically speaking anything in the horiz deflection, hv development area will cause a no pix symptom, also a problem in the signal processor section, video river and output section as the crt/socket assembly.
I would also check the lopt transistor and probably the fuseable resistors around the lopt.