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

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PDP screen self-test method summary

Samsung V2 screen self-test method cancels all circuit boards produced by Changhong, short-circuits CN802â—‹3â—‹4 on the power board socket (CN802 pin 4 POWER-ON/OFF ground), the signal comes from the secondary power-on control signal output by the motherboard CPU Short-circuiting the foot is equivalent to the user pressing the on/off button;

Turn the toggle switch SW2001 on the logic board from the original external mode (1, 2, 4, 3) to the internal mode (self-test mode) (1, 3 up, 2, 4):
Turn on the power and see if the screen is lit. If the screen displays the full white field signal, it indicates that the Changhong motherboard or video processing board is faulty. If the screen is not displayed or the full white field is not displayed, the screen and screen components are faulty.

Samsung V3 screen self-test method Samsung V3 screen self-test mode is basically the same as the V2 screen, but the bit number of the shorted socket is different.
Shorting the CN9004â—‹3â—‹4 pin in the V3 screen can realize the voltage output of the power supply board. The toggle switch bit number and the toggle position required to display the full white field grating are exactly the same as the V2 screen.

Samsung V4 screen self-test method disconnects all the connecting lines of the screen and signal board, shorts the CN8007â—‹3â—‹4 pin of the socket, and shorts the CN2034â—‹3â—‹4 pin of the logic board socket. At this time, the plasma screen should be fully displayed. White field grating, otherwise the plasma screen should be a fault screen.

S42SD-YD09 self-test mode (V5 screen)
(1) Short circuit the two jumpers of the logic board socket CN2001(3)(4) (horizontal direction).
(2) Short-circuit 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 pin 9 of CN8003). The fourth pin is the PS-ON signal from the bottom to the top.
(3) Remove all signal boards produced by Changhong.
(4) A full white field should appear after power-on.

S50HW-YD01 self-test mode
(1) Short circuit the CN2012 on the logic board;
(2) Short-circuit the PS-ON of CN8003 on the power supply board to ground;

S50HW-YD02 self-test mode (W2 screen)
(1) Short circuit the two jumpers of the logic board socket CN2007(3)(4) (vertical direction).
(2) Short-circuit the 8th pin and the 9th pin of the power board socket CN8003. The purpose is to short the PS-ON pin to the ground to achieve the second boot.
(3) Remove all signal boards produced by Changhong.
(4) There should be 7 color pictures (such as Red Square, Blue Field, etc.) after power-on.

The LGV7 screen self-test method first disconnects the motherboard, AV board and power supply auxiliary board cables produced by Changhong, and then connects the AC input socket directly to the CN101 input terminal of the LG power board, and then puts the logic board (Logicmain) on the resistor R407. Disconnected, after power-on, the image screen (various test cards) should appear on the screen.