3.1.1 Function
LD2006SI is a 20” LCD_TV with multiple functions, such as DVD playing and USB reading function.
E l e c t r o n i c s c h e m e o f T V p a r t a d o p t s 2 0 ” T F T d i s p l a y s c r e e n + i n v e r t e r c o m p o n e n t s
(ST tuner JS -6H2/T121. MST718 includes MCU/video A/D
converter/LCD image processing circuit. DVD part electronic scheme adopts M64M
SDRAM+16M FLASH+D5954. HD62 loader can smoothly read MPEG4/MP3/CD/DVD format discs and
decode chip MT1389HD may support USB and card read function.
# Digital picture adjustment technology to adjust sharpness, brightness, contrast, hue and
saturation of pictures; gamma correction.
# Video circuit supports PAL/NTSC/SECAM/PAL60 multi-system video signals.
# Support USB/card read function.
# Compatible with DIVX, MPEG4 format film.
# Support PAL BG/DK/I, SECAM BG/DK/L/L’ RF signal modulating.
3.1.2 Block diagram of the player
3.1.2.1 This machine is mainly composed of the following PCB semi-finished products and display
screen components. Please refer to model list for allocation of the player:
1. Main video board (21903-4): this PCB semi-finished product is the main part of the player. Main
video board includes audio/video input circuit, audio selecting and amplifying circuit, video selecting and
LCD drive circuit, DVD decode and servo circuit. The main function is to fulfill audio/video signals’
processing and DVD function’s fulfilment.
2. Power board (@52006-0UL): power board is mainly composed of rectifying circuit and filtering
circuit. This PCB semi-finished product’s main function is to provide the player with working power.
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Chapter Three Principle and Servicing
Section One Principle of the player
The previous manual: TV part