29-inch high-definition three no, the main voltage jitter repair in the middle - android - Phones Developers

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

1.5PF SOT23-6 Low Capacitance 5V Breakdown Voltage 6V SRV05

Shunuo varistor / ESD varistor / product complete / Sunlord first-class agent

Factory direct 5050 yellow light LED 5050 yellow light 5050 yellow high quality high brightness

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

At 6:30 in the morning, someone called for TV repair. When I arrived, I found that the TV had no power, no sound, and no picture. I went to the store to disassemble it and checked the main power supply. The 310V was present, but 140V wasn’t dropping. I tested the circuit regulator before and after, and found that the 431 was burnt out. The optocoupler had also failed. Based on my experience, I concluded that the 5Q1265RF was dead. I replaced the thick film IC, the optocoupler, and the 431. After booting up, the 140V still fluctuated. I then checked the resistance of the third-stage transistor and found that 124 was broken. I also discovered that 4148 was damaged. Since I didn’t have a 124 on hand, I used a 1815 instead. I connected a 22k resistor in series at the base and parallel with another 22k. After that, everything worked normally!