Konka color TV T25SE073 automatic shutdown fault repair example sharing - appliance repair - Huaqiang electronic network

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

inductance

Konka color TV T25SE073 start to slam, the high voltage package short circuit sound, disassemble the line tube short circuit, directly remove the high voltage package, the old machine should be broken. The original high-pressure package is BSC28-0637 30001472. There is no stock in the store, and it is replaced by BSC28-0643 30001712. The screen of the test machine is normal, and the screen saver mode is connected to the signal for a few seconds to protect the shutdown and enter the cost state. Press the program plus or minus button to turn it on again, but the boot screen just lights up and automatically shuts down (boot screen mode). When it is on, the screen image is normal. It is suspected that there is a problem with the protection circuit itself. The protection circuit has not found any bad things after checking it all over. There are quite a few faults on the Internet to find SE series machines. There are various kinds of field protection circuits, standby circuits, high voltage detection circuits, lamp protection circuits, and a lamp limiting current limiting resistor. The ohms are changed to 2.7 ohms. The protection circuit in front of me was checked, and the last one changed the resistance. The original machine was 1 ohm. I changed it to 2.2 ohms. The test machine did not shut down again. Looking back, it should be protected circuit protection caused by the voltage and current of the high voltage package lamp being replaced higher than the original.


[attach]450594[/attach]