Example 1: Konka P29ST390-TV, three no. analysis of repair: power test machine and AD1895AYRSZ datasheet and found that the power indicator light, press the panel buttons and AD1895AYRSZ price and remote control and AD1895AYRSZ suppliers and can not turn the standby button, open the back cover, measuring standby control tube V960 (2SC1815) is extremely high potential base , indicating that the tube is saturated conduction state, the measured CPU (U23, M3n622SPGP) (11) feet (external crystal) voltage is also normal; measured CPU power supply terminal ((14), (16) feet) voltages are normal, Replacement crystal Y4 (10MHz) after the test machine fault persists. based on past experience, CPU, video digital processor SVP-EX11 often due to pin Weld, short circuit fault caused by a black screen and no map. Double-check the pin, and did not find Weld, short circ...