Thanks for the answer, yes i have low experience in TV reparation but i dont have the schematics for this TV, if you could send me this to my mail (email@example.com) or post the link it could be helpfull to solve my problem! And yes i hear a clicking sound. I can power on my TV sometimes and it work regular (clicking sound periodly), but sometimes when i turn on my TV, i hear two or more clicking sound and the TV turn off inmediattly! I am scare because an repair person on my country said that the problem is the ctr´s and want arround $1000 for repair it. I dont thing that the problem are the ctr´s.
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Re: I hear a sound like a shortcircuit on backside?
I think the problem is either the power supply/High Voltage board or the IHVT (Integrated High Voltage Transformer). I don't have schematics for this model, in addition you will need to take the IHVT out and perform a ring test on it, also I would advise you to check and see if the Horizontal Output transistor is shorted also, you can do this with an ohmmeter (measure between the collector and ground it should have a high reading if the reading is low the transistor is bad). The ring test can be performed with the use of a Universal Video Analyzer, or a LCR analyzer.
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The popping sound may have been a capacitor. The chance are the capacitor is in the HV section of the TV set and is part of the supply to the Horizontal section of the TV. First if you do not have electronics experience I would suggest you take the TV to a qualified TV repair shop. OK now if you have electronics experience I would say to unplug the TV, open the set up and do a physical inspection of the TV you will be looking for a capacitor that has exploded; if you find one look at the schematic for the TV and find its value. Then do so checks to find out why did the capacitor explode. Most likely the capacitor exploded because of wear and tear, but it always pays to check. Replace the capacitor with one of the same value and then turn the TV on, use your voltmeter to measure the voltage across the capacitor to make sure its the same or close to the value on the schematic.
First of all I think you are hearing a clicking sound right? That noise is due to the HV shutdown circuit activating, indicating that excessive current is being drawn. Now the fact that the TV is on is indicating that the current level is right at the point of shutdown, now I would like to know if you have the schematics for this TV? If so locate the input to the HV trippler and measure the voltage with a HV probe, and compare it to the value on the schematic. In addition you say you have a convergence problem, for that I would say you have to change out your convergence amplifier modules.
Now let's get the the over all issue here: Do you have electronics experience? if so you will need a HV probe, a multimeter, and a pattern generator to solve this problem. If you have these pieces of equipment great, if not you will have to get them. If you do not know what these pieces of equipment are, close the TV up and have a TV repair person come and give you an estimate on the repair costs.
If this were in my shop I would triage the issues you are having,
First find that sound you are hearing (the exact location) and determine if it is a clicking noise or a burning noise (arcing).
Second repair that convergence problem, compare the voltage readings with the schematic
Third repair the HV issue
This should leave you with a working TV.
REMEMBER if you do not have electronics experience, have a TV technician take a look at this set.
Projection tvs are all basically the same. Most likely it is the coil unless you can find a short somewhere else in the power supply. The coils tend to go after so much use. If you still want to email the schematic, let me know but I think you are right with thinking that it is the coil and it will need to be replaced.
Let me know if you have any further questions as I would be more than happy to answer them for you
This is a problem with the low voltage condition in the main power supply or the sweep supply, or there is bad capacitors in the vertical driver circuit, or the PIP circuit if there is one. the best way to troubleshoot this would be with a schematic, measure all the voltages and see if there are any lower then normal levels. In the vertical and PIP circuits, you will need an ESR type capacitor meter. if you dont own this equipment, or have had no experience working on solid state electronics, play it safe and call in a tech to assist you in this repair. Good Luck
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