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AV (Video) Input circuit (TV,AV,S,SCART,YUV(YPbPr),PC,HDMI:
• AV in/output signal includes:
•
TV:Image composite signal output from tuner and separate into two way:one enter U2
AN15857; Other one be amplified in Q46,Q47 to be the video output of SCART1.
• AV :the image signal transmit to U2 AN 15857.
•
Image composite signal of TV,AV,SCART amplify 2 times in U2 then transmits to U1
PW106B Via U2 Pin54 process decoding procedure
• S(Y/C):The video signal input U1 PW106B..
• SCART :SCART 1 and SCART 2 are full SCART, SCART 1 is always TV out ;SCART 2 is monitor
OUT.
• Y signal ,C signal and RGB signal transmitting and switching in U2 AN15857 .Y signal output
from U2 PIN52; C signal output from U2 PIN 56; RGB signal output from U2 PIN62, PIN 60 ,PIN64
,then decode signal in U1 PW106B.
• Component (YUV/YPbPr)video signal transmits and process decode procedure in U1 PW106B.
Component signal is YUV,Y content Horizontal sync signal and Vertical sync signal.
• VGA signal includes: R、G、B (Horizontal sync signal) (Vertical sync signal),
• The EDID code of VGA store in U6 24LC21A, it's can burning DATA via jack about 128 bytes.
• TMDS of HDMI 1 ,HDMI 2 decode into R.G.B signal in U11 SII9023 then process image quality
and scaler procedure in U1 PW106B.
• CM1~CM8 are govern EMI element. U4,U35 Rclamp 0514 is ESD
• EDID of HDMI store in U3,U34 24LC02B and each one content 256 bytes date.
• U1 PW106B is the most important IC in this system. Main function are:
a.CPU:Microprocessor
b:ADC:Switch analog signal into digital signal.
c.Video Decoder (3DComb filter:Decoding HDTV(1081i),NTSC,PAL,SECAM signal.
d.Deinterlacing:Switches not progress screen into progress screen. EX 1080i switches to 1080p
e.Scaler: Scaler rate .Switches different resolution which from input source in to panel resolution.
f:OSD:Offer 256 color OSD
g:Image Management : EX, sharpness DLTI, DCTI...
h:Display output port:Switches signal ib to LVDS signal which panel need.
Antenna Circuit:
• Tuner FQ1216 receive the signal come from CATV or antenna RF PAL/SECAM signal
and demodulate image composite signal (signal mark TV 1) and audio medium frequency
signal (signal mark SIF1).
• Image composite signal (signal mark TV 1)
• Via Q6 Video buffer(signal mark TV1_EX) than enter U37 Scaler IC EX-52 CVBS1 in-
put jack (Pin242) directly. Switches with other input signals in inner switch circuit.
• Other one via Q9 buffer (signal mark TV1_SW) enter U22 SCRAT SWITCH IC
CXA2125 TV_CVBS VIN_15 input jack (Pin23) and switch with other input signals to pro-
cess POP/PIP signals selection .
• Audio medium frequency signal (signal mark TVAF1), transmits to U48 MSP3410/
MSP3411 SOUND PROCESSOR PIN50 to demodulate audio IF and stereo. Than
switches signal source with other Audio Source (PC AUDIO, U22 SCART SWITCH IC CX-
A2125Q AUDIO OUT). PIN 20,21 outputs Audio R/L signal, and amplify by OP AMP U57
U59 TL082 then enter D-amplifier U66 TPA3004 output.
TV,AV,S,SCART,YUV(YPbPr),PC,HDMI
7
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