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blinks - High voltage shutdown. The high voltage has exceeded 33k and the unit
goes immediately into safety shutdown. Check power supply regulation and
horizontal circuits. Power supply regulator section circuit should be troubleshooted. It is fatal to proceed trouble shooting this section, without proper knowledge in electronics, as if you want to measure the voltages to this section, the TV must be switched ON. When it is switched ON, or powered up; most of the components in this section will be dangerous to touch. If you are not handy, seek tech support. It will be more better.
Blinking led in sony tv is its self dioganising function. 7 blinks by it means the horizontal output voltage increased above 33k.
You have to check the power supply stage of you tv. Normally in sony tv dry soldering can happend in the power supply stage. It will lead to unregulated voltage output from the power supply. Resolder all the points in the power supply section it will solve your problem.
Hello melanie Hi, in my experience as a TV technician, that would usually be a shorted part, the horizontal output transistor, that part powers the HIGH Voltage section. Very Lethal, the power supply detects this bad part which in turn makes the unit go in standby so as not to damage the TV much further. mMy advice is go seek a tv tech to repair the part.
You can check any 5v input to the microprocessor and sound is the audio IC whether have any voltage input.You can try to troubleshoot but please be careful.I don't have your model schematics but oher philip models.
Is the sound a high pitched whine? or an arching noise?
since half the screen is black I would tend to believe it is a deflection problem. Which is the Horizontal section were having problems you would experience this.
Ok first get a schematic for this television. Either contact the manufacture or get one from www.servicemanuals.com
Open the set up.
Determine where the sound is coming from
I guess would be the switching transformer or the IHVT (Integrated High Voltage Transformer)
Then if you have one get hold of your multimeter set to dc volts and begin to measure the power supply voltages leading to the Horizontal section.
Your problem will be in these sections.
As you say that it works for 5-10 minutes it clearly indicates that all parts are 100% ok.
problem is loose contact mostly in power supply& IF IT IS OK then loose contact in horizontal section.
This sounds like one of the capacitors has dried out. They are metal cylinders containing 2 rolled up strips of foil separated by a gel. Over time the gel can dry out an eventually the strips of foil touch creating a short circuit.
A TV repair shop should be able to replace the faulty component relatively easily. I wouldn't recommend trying to do this yourself unless you are very confident you know what you are doing, the voltages present in a CRT TV are very dangerous.
The Tic Tic sound is a result of the high voltage shutdown circuit. Thats what the circuit does if theres a short in the Highvoltage sweep. like maybe a shorted horizontal output transistor??. The only way to really tell is go in and measure the start up voltage and if the Hivoltage comes up and shuts down its a fault in the shutdown or Hhv regulation circuit . if it dosent come up at all then the faults in the Horizontal sweep circuit . Hope this explains a bit? good luck