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Tube TVs
Philips 21pt9457 / 55 television chassis sk4.0l ca does not turn on
hace 5 años
hace 5 años
This tv came with the flyback badly take it out and check nearby components, the TSH measures well, when I turned it on I burn the vertical; I changed secondary capacitors, I changed the source str because I isolated the source and it marks me 140 in B + of secondary with 100w load I need your help with this fault the source components are fine but it still gives me 140v.
65.783
hace 5 años
hace 5 años
That tv works with 116 volts in + b. I try to calibrate the pre-set source control? the focus is too large for simulated load, it must be 60w or 75w maximum. check the circuit that controls the optocoupler on the part cold of the source if the voltage does not drop. greetings
1.242
hace 5 años
hace 5 años
Friend, what flayback are you locating because if you burst the vertical is flayback problem
hace 5 años
hace 5 años
I continue with the repair of this TV I found the diode d303 in the horizontal stage in short change it check other components all ok now it already lights but the image is distorted on the left side I get a wide vertical strip.
hace 5 años
Well, my dear friends, I thank you for your support especially of Victor E and Sergio Santos for your comments on this fault. Checking in the horizontal stage I found the crossed 8v2 zener d306 which caused me distortion in the image, it was changed and now the TV is being tested and everything is fine, the correct voltages and the normal image.Thanks to God and you. for your support.
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