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Probe domestic switch needle KG-300K needle head diameter is 3.0mm normally open switch needle
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MOS power IC full range
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Samsung tantalum capacitor TCSCS1E105MAAR original spot
Symptom: Samsung rear projection TV SP43T7HC has high-voltage sound, the picture tube filament can be intermittently lit for 6-7 seconds, but the picture tube does not emit light, after about 6-7 seconds, pause, then continue to boot, then stop, This has been repeated.
After carefully checking that the voltages of the power supply are all normal, the circuit of the line is also normal. After careful investigation, it is found that there is a fault inside the digital box. Because the rear projection TV has been eliminated, there are few accessories in the market, and the factory does not have this digital box. This can be difficult for me, I had to put it aside, this is not the day before yesterday, nothing happened suddenly, the digital board was pulled out for testing, the patch components and capacitors were checked one by one, no problems were found, and finally the target was locked in On a patch IC, the model is CXA2165Q, and the maintenance has entered a deadlock. In the case of a last resort, I had to ask for help from a Samsung after-sales friend. Samsung’s friend finally found a piece of the same type of old board. Take it back and use the hot air gun to blow down the patch IC, and all the plug-ins are reset and turned on. Everything is all normal, which is a relief.
