Changhong plasma power supply fault judgment and separate working methods - android - Phones Developers

MOS power IC full range

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

Electronic scale crystal oscillator 3.2*2.5mm 3225 16M (16.000MHZ) 12PF 10PPM 20PPM 30PPM

Different types of plasma TVs, power board structure, circuit, output voltage and power-on control methods have great differences, but as long as the corresponding control signals are added, they will work independently. In maintenance, the motherboard or logic can be simulated. The power-on command issued by the board achieves the purpose of making the power board work alone. This is also the quickest and most effective way to judge the power board failure.
The power board works separately by disconnecting all the cables on the power board and shorting the relevant socket pins to simulate the control signals from the motherboard or logic board. Connect to AC220 to judge whether the power board is good or bad.
A. Samsung screen power board
1.S42AX-YD01 screen
* Socket CN8007 3 and 4 shorted * Socket CN8008 1 and 2 shorted
2.S42AX-YD02 screen
* Socket CN8003 8 and 9 shorted * Socket CN8002 1 and 2 shorted
3.S42AX-YD03 screen
* Socket CN803 3 and 4 shorted * Socket CN8002 4 and 6 shorted
4.S42AX-YD04 (V2) screen
* Socket CN802 3 and 4 shorted * Socket CN803 2 and 4 shorted
5.S42AX-YD05 (V3) screen
* Socket JP8005 shorted * socket JP8002 shorted
6.S42AX-YD07 (V4) screen
* Socket CN8007 3 and 4 shorted * Socket CN8008 10 and 9 shorted
7.S42AX-YD09 (V5) screen
* Socket CN8003 3 and 4 short-circuit * Socket CN8002 1 and 2 shorted
8.50HW-YD02 (W2) screen
* Socket CN8003 3 and 4 short-circuit * Socket CN8002 1 and 2 shorted
9.50HW-XD03 screen
* Socket CN9004 3 and 4 shorted * Socket CN8008 2 and 6 shorted 2. LG screen
1.LG-32 screen
* (13) of socket P814 is connected to (3) and (4) with a 5~10K resistor.
2.LG-V7 screen
* Turn the switch SW601 to AUTO to connect the 5VCRTL to the ground and connect 10 ohm / watt resistor
3.LG-PDP42S1 screen
* VS-ON of socket P800 is shorted to STB5V *PLY-ON is grounded
4.LG-PDP60X7#### screen
* Socket P800 3 and 5 followed by a 5~10K resistor *VS and ground connected to a dummy load bulb (must be connected)
Three. Panasonic screen
1.M7 screen
* Socket P27 2 and 4 shorted * socket P12 4 and 5 shorted
2.M8 screen
* Socket P25 10 and (17) Short-circuit * Socket P12 4 and 5 shorted
3.42S9 screen
* Socket P25 10 and (17) Short-circuit * Socket P12 10 Ground
4.50H10 screen
* Socket P25 9 is shorted to (11)
5.42W10 screen
* Socket P25 9 is shorted to (11)