Samsung PPM42S2X/XAA Service Manual page 54

Circuit Operation Description
5-3-1(A) TDESCRIPTION OF LOGIC BOARD
The logic board consists of the logic main board and the buffer board. The logic main board processes video
signal, and then generates and outputs address driver output signal as well as XY drive signal. The buffer
board buffers address driver output signal, and sends it to the address driver IC (COF module).
Logic Board
Login Main
Buffer board
5-3-1 (B) NAMES AND DESCRIPTION OF THE MAIN COMPONENTS OF THE LOGIC BOARD
5-32
- Processes Video signal (W/L, Error diffusion, APC).
- Outputs address drive control signal and data signal to buffer board.
- Outputs XY drive board control signal.
E Buffer board
Sends data signal and control signal to left-bottom COF.
F Buffer board Sends data signal and control signal to right-bottom COF.
Function
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