Plasma PDP screen self-test method summary - android - Phones Developers

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PDP screen self-test methods summary Samsung V2 screen self-test method: This method cancels all circuit boards from Changhong and short-circuits CN802 pin 3 and 4 on the power board socket (CN802 pin 4 is POWER-ON/OFF ground). The signal comes from the secondary power-on control signal output by the motherboard CPU. Shorting these pins simulates pressing the power button. Next, switch the toggle switch SW2001 on the logic board from the original external mode (1, 2, 4, 3) to internal mode (self-test mode) (1, 3 up, 2, 4). Turn on the power and check if the screen lights up. If it shows a full white field, it indicates that the Changhong motherboard or video processing board is faulty. If there’s no display or the white field doesn’t appear, the screen or its components may be defective. Samsung V3 screen self-test method: Similar to the V2 method, but with different pin numbers for the shorted socket. For V3, shorting CN9004 pin 3 and 4 allows the power supply board to output voltage. The toggle switch settings required to display the full white field are the same as in the V2 screen. Samsung V4 screen self-test method: Disconnect all screen and signal board connections, then short CN8007 pin 3 and 4 on the socket, and CN2034 pin 3 and 4 on the logic board socket. At this point, the plasma screen should show a full white field. If not, the screen is likely faulty. S42SD-YD09 self-test mode (V5 screen): 1. Short the two jumpers at CN2001 (3)(4) on the logic board (horizontal direction). 2. Short the PS-ON pin to the ground pin in the third socket on the left side of the power supply board (short pin 8 and 9 of CN8003). Pin 4 is the PS-ON signal. 3. Remove all Changhong signal boards. 4. After powering on, a full white field should appear. S50HW-YD01 self-test mode: 1. Short CN2012 on the logic board. 2. Short the PS-ON pin to ground on the power supply board's CN8003. S50HW-YD02 self-test mode (W2 screen): 1. Short the two jumpers at CN2007 (3)(4) on the logic board (vertical direction). 2. Short pin 8 and 9 of the power board's CN8003 to achieve a second boot by grounding the PS-ON pin. 3. Remove all Changhong signal boards. 4. After power-on, 7 color patterns (such as red square, blue field, etc.) should appear. LGV7 screen self-test method: First, disconnect all Changhong-produced motherboard, AV board, and power supply auxiliary board cables. Then connect the AC input directly to the CN101 input terminal of the LG power board. Also, remove the resistor R407 on the logic board (Logicmain). After powering on, the screen should display various test cards.