42-inch Samsung plasma TV does not boot fault repair examples - appliance repair - Database & Sql Blog Articles

Single chip microcomputer STM32L151CCU6

Mobile phone crystal 3.2*2.5mm 3225 26M (26.000MHZ) 7.5PF 10PPM 20PPM 30PPM

DFN1006 TP-RCLAMP3321P ESD Diode Low Capacitance

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

Years ago, a local customer asked me if I wanted an LCD TV. I just said that it was a big problem. I didn’t turn it on and sometimes it would be flashing. I didn’t have to buy it for Samsung. I only need to add 1000 pieces and only guarantee for three months. Then I think about it. Cost-effective to buy a 50-inch LCD is not going to go, go to his home to see is a 42-inch Samsung plasma, no VGA and network socket, then call the inquiry of the old appliance, and the phone amplification, (feed How much do you charge 42 inches of plasma, the appearance is about 60% new (in fact, 90% new), about 99 years to buy, there is no value for answering the plasma, you have to charge at most 50 dollars, if If you want LCD, you can charge 100 or 200.) Hurry up and tell the user that someone else receives 50. I will give you 100 pieces. The user is very happy to drive back to the store.
I haven't repaired the plasma. I haven't seen the circuit inside the truth. I thought it was nothing more than a backlight problem, because the user said that sometimes it would flash, open and look dumbfounded, and the backlight of the LCD is completely different. There are 6 boards, I wonder if I can try to remove the backlight board, so all the connections that are unplugged can be turned on, and the sound is normal. Ok, now I should check the backlight, the first step is in the road check. Backlight power board, there are not a few parts inside to find a RJP63F3 power transistor short circuit, the surrounding patch components did not find a short circuit, so sent a few disassembled from the Internet back to install the boot after the sound is still, this is a bit Blind, because his principle has no research at all and no time to check the information, check the resistance of the two backlight power boards are almost the same, it should be OK, now check the backlight of the screen, it seems to be called Y board I don't know if it's right, no matter it, there are two FET 19NF20 short circuits on the other one and two ones are 19NF20 and one B10K60. I am afraid that I made a mark and the surrounding patches were checked. There is a short circuit phenomenon, there is no such model on the hand or online shopping, or the machine is cheap and good, come back to the effect tube behind the tin plated on the boot all normal, and worry about the heat is not good or not welded, with a hot air gun After the soldering of the soldering screwdriver, the boot is turned on and the new year is normal.