How do i change a horizontal transistor on my jvc tv

Check and replace its LOT {Line Output Trasformer}. It is faulty.

Check and replace damaged component/s in its horizontal output section circuit. Check LOT and horizontal output transistor.

You can use [BU508AF or C3886A OR D5702] as horizontal output. All of these transistors are equivalent to each other, and is commonly used with RCA TVs. But, if there is a fault with its Horizontal output Transformer, {LOT}, none of these transistors won't last long. They will heat up excessively, and will get shorted. Therefore, check whether the LOT has any trouble. Ask your technician. He will be sound enough how to check it. Mo multimeter check is possible with this component. His experience in service work will help him to troubleshoot this problem.

Try to replace new harizontal output transistor.Before replacing the transistor,check the regulator and the flyback if shorted or not.If the flyback is shorted the harizontal output transistor will be damage again if you trying to turn on again.Thanks..

It is worth getting an estimate. From the symptom you explained, it looks like the horizontal output transistor became defective.

check the yoke or change the crystal number 503(blue/ orange)if still damage the Horzntal transistor , flyback is defected.

has the problem solved a little yet?

Your TV is in the protection mode. First, locate the horizontal output transistor. This is found very close to, or next to, the horizontal output transformer (also known as the flyback). The flyback should be on an aluminum heat sink, or on the side of the metal chassis. Disconnect or unsolder two of the three legs of the transistor. Measure it with your meter, or plug in the set with the light bulb attached across the fuse.
If the transistor is shorted, or the light bulb doesn’t glow bright anymore, replace the transistor and plug back in. If the light bulb glows bright again, you must replace both the flyback and horizontal output transistor simultaneously. In some cases this will fix the set, but sometimes there are multiple problems with a set.
Go to where the flyback is, and start measuring the diodes and capacitors on the flyback itself. If you don't find any shorts there, it could be a shorted vertical output IC, a shorted sound IC, a shorted disc capacitor in the Hi Voltage/sweep circuit, or in rare cases, a shorted capacitor or tuner.Feel free to ask and post whatever the result of your troubleshooting..


Hope this may help;

Regards,
VOTIT

DON'T FORGET TO RATE

You can follow from fly back the B+ supply is directly connected to the horzontal out put transistor.

did you check his horizontal transistor?what is the voltage of the b+ in flyback. but common causes of that model is the defective horizontal transistor.