29-inch Konka color TV TDA16846 power board common problem - android - Phones Developers

Probe domestic switch needle KG-300K needle head diameter is 3.0mm normally open switch needle

MOS power IC full range

100V, 250mA, surface mount, high speed switching diode

Passive 3225G 8MHZ 10MHZ

Today, I went to repair a Konka 29-inch TV, and turned on the power switch indicator. The boot check is to use the power of the TDA16846 chip, and the insurance is not burned. First test + B no short circuit and then the test tube is also normal, to eliminate the problem of line scan and then test the other two groups of power supply is also no short circuit, determined that the power supply does not vibrate. Directly enter the theme to remove the 11-pin 3.3M starting resistance measurement has been broken, and then measure the capacity of the power supply foot 13 pin 47U / 25V capacity becomes smaller, the above two accessories can be replaced, the whole machine repair process is less than 15 minutes! I have repaired a lot of power supplies using this kind of chip. Konka's TCL's Skyworth has it. The power supply does not vibrate. The above two components are bad. The resistance values ​​are 2M to 4.7M. The brands are different. The TDA16846 is bad. Rarely, probably because the starting resistor only uses 0.5W, and the capacitor is too close to the heat sink. Most of the above accessories are hand-to-disease, which should be considered a common problem.