A. The function of each module on screen: gu5service manual download site
The PDP screen is divided into total power board, driver board, driver board, logic board Y X, logical BUFFER plate (E, F, G), Y BUFFER plate (upper and lower), COF package: gu5service manual download site
 gu5service manual download site
* the power board: to screen, screen board, other functional modules and the whole machine factory do video processing board to provide power supply. gu5service manual download site
* X driver board: according to the logic boards sent by timing signal, produce and provide the X electrode drive signals. gu5service manual download site
* Y driver board: according to the temporal logic board sent signals, produce and provide Y electrode drive signals. gu5service manual download site
* logic board: sent the image signal processing by the motherboard, addressing the drive signal and drive signal for X, Y driver board. gu5service manual download site
* logic BUFFER plate (E, F) : from the logic board data signals and control signals to COF package needs. gu5service manual download site
* Y BUFFER plate (up, down) : Y drive plate scanning signal transmitted to the screen, is divided into upper and lower two parts. gu5service manual download site
* COF package: the logic signal from BUFFER board, to address signals for the use of screen. gu5service manual download site
 gu5service manual download site
Second, the fault diagnosis: gu5service manual download site
 gu5service manual download site
1. The screen is not bright, gu5service manual download site
 gu5service manual download site
A, by the power supply filter plate to the power supply board power supply socket to see if there is good. No, plug socket. gu5service manual download site
B. check the fuse on the power panel is open, is a good word to replace the fuse. gu5service manual download site
C. the socket on the power panel CN802 POWER_ON / 4 feet OFF ground: gu5service manual download site
Again will toggle switch on the logic board SW2001 from external schema (1, 2, 4, 3) dial into internal model (1, 3, 2, 4) : wired up, see if screen light up. If the screen can output a normal white field signals, it is our motherboard or video processing board problems, further processing. gu5service manual download site
D. if the screen is still not bright, replace the power supply board first, see if problem solving. gu5service manual download site
E. if the mains board still can't solve the problem, for screen problem, replace the whole screen processing.

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