My problems started with a high voltage sound that was so loud you couldnt hear over it. I could turn off the television for 30 minutes or so, turn it back on, and it would be fine for a while. The sound ended up going out all together. Then the blue started going out. Seemed like all I had was redish/green screen, but the images were fine. Today I have only black and white, with still no sound. Is this something anyone can help me with or do I need to go shopping for a new one? Thanks in advance for any help. ___J.A.
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Re: PCL5415R NO COLOR OR SOUND
On the secondary side of the horizontal output stage flyback transformer, they have a secondary supply output. This output comes off from a number of windings in the flyback transformer. These feed individual sets of high speed rectifiers and then they are filtered with electolytic capcitors. Some of these outputs also feed voltage regulators where regulation is required. Briefly, most likely there is a failure in this section and therefore a supply voltage is missing that is used to run the sound processing and colour demodulation.
If the voltage went too high for any instant from the failed voltage sources before they failed completely, there is a possiblity that other damage in the sound and colour processor sections.
I would suggest to take the TV in for an estimate to see if it is feasible to service. If it is only a number of capacitors and maybe a some high speed diodes and voltage regulators that have to be changed, most of the cost will be for the labour.
First get an estimate for the repair. Considering the age of the set, it may pay to get a new one.
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Thus the line connected to a surge protector or some kind of line protector. This can be consider.
Or if this is a crt type tv. This could be a fault on high voltage section. Horizontal output transistor or flyback. But check also for loose connection/solder crack. That clicking sound may be the relay in action.
If it isn't too late, read this; I just posted it to another:
"You are losing high voltage; if you sniff around the top or back of the set, you may smell ozone.
Pull the AC plug on the set overnight, remove the few screws holding the rear housing on, use a CLEAN (or new cheap) paint brush and if you have a vacuum with a hose, bring it along too.
The CRT (picture tube) will be nasty, full of dust that is picking up moisture and creating a path for the high voltage to discharge and you need to clean it with the brush and it's better if you hold the vacuum hose close by so you can **** up the dust loosened by the brush.
If you clean it well (dry, not wet), the problem should be gone."
In your case, the shutdown is caused by a protective circuit that is activating when the HV arcs.
Repeating this will eventually cause a complete failure.
There is a fault in your tv, if this is a crt type could be at high voltage section.HOT is shorted , flyback is shorted or both. But atleast your standby power is working. The click sound could be the relay in action.
The television has a protection circuit. Sound like you know something about electronics so that is cool.
I suspect the HOT or High Voltage Transformer. If you want to operate on it, they typically will short externally from moisture or plastic high voltage breakdown. The TV starts, shorts as it cannot come to full high voltage, then shuts down. If your brave, you can unsolder the HOT which is the part that is on the main board or that comes from the top of the picture tube wire into a dark or spaceship type object.look underneath, sometimes they short underneath and you can scrap the carbon and get it to at least start up and work. Do not leave this as a fix as it can be a fire hazard.
The HOT is the most common. They are around 20-60 bucks. 34" TV. I am assuming this one without looking it up it is NOT a flat screen, as most do not squeal like that nor do they have to de-gausse like the old ones. I just looked it up and yes it is not a flat screen. Old school, so that is more thank likely the problem.
What is happening is that the Shutdown Circuit is turning the TV off due to excessive current flow. The excessive current flow is most likely the result of a problem in the HV (High Voltage) section of your TV. This could mean that the Horizontal Output Transistor or the Integrated High Voltage Transformer has malfunctioned (developed a short circuit). I would advise that you let a qualified TV technician work on the set due to the nature of this problem.
It sounds like the high voltage circuit got damp and arced. This arc caused the horizontal output transistor to short.
You might try replacing the output transistor if you're experienced in this type of repair. If not then you need to take it to a repair shop.
The "whistle " you're hearing is the power supply indicating that it has a short on its load. When the power supply has an over load (short) its frequency drops down when your ear can hear it oscillating. This type of power supply is a switching power supply normally operating a several thousand hz(cycles) which is out of range of human hearing.
According to the Samsung website: "The high pitched sound you hear is probably coming from the flyback transformer. The flyback transformer converts the relatively low voltage electricity that comes from the outlet in your home to the high voltage electricity needed to drive the cathode ray tube in your TV. It is not unusual for a flyback transformer to buzz softly when it operates. However, if the sound is loud and high pitched, it probably means the transformer is failing. To eliminate the sound, you will have to get your TV serviced."