PDP原理及維修培訓

1、PS42E7原理及維修培訓研發(fā)中心 李明2007-4-281PS42E7系統(tǒng)介紹PS42E7是單通道PDP TV方案。在結(jié)構(gòu)上采用媒體盒加Monitor方式。這樣本機既是一臺高清晰畫質(zhì)的PDP TV,又可單獨作為PDP顯示器使用。本方案媒體盒和Monitor之間信號傳輸采用TMDS格式的純數(shù)字視頻信號，以確保傳輸信號的帶寬。支持HDMI數(shù)字視頻信號，YPBPR/YCBCR高清信號及普通的RGB，VIDEO,S-VHS和NTSC射頻信號輸入。本機還帶有一個DUB-9控制口可方便地對信號系統(tǒng)進行軟件升級。2功能和規(guī)格PDP顯示屏有效顯示面積 93.294 cm (H)53.28 (V) cm (4

2、2 ),16:9象素852(H)480(V)彩色數(shù)1073.7 M對比度(典型) 10000:1亮度(典型) 1500 cd/m23功能和規(guī)格調(diào)諧方式頻率合成調(diào)諧系統(tǒng)，模擬、數(shù)字存儲200個頻道調(diào)諧器單制式一體化電子，DVB-T一體化數(shù)字電視調(diào)諧器揚聲器4 /10 W 二個4視訊盒接口數(shù)字電視廣播輸入口：RF輸入口一個模擬電視廣播輸入口：RF輸入口一個音頻輸入口：RCA 四組，耳機輸入一個視頻輸入口：RCA 2個YpbPr/YpbPr輸入口:RCA 兩組S-VHS 輸入口：一個數(shù)字視頻輸入口：19針 HDMI接口一個電腦VGA輸入口：D15 機頂盒一個視頻輸出口：RCA一個音頻輸出口：RCA一

3、組，耳機輸出口 一個數(shù)字系統(tǒng)接口：D30 機頂盒一個軟件升級接口：D9 機頂盒 一個 5Monitor接口音頻輸入口：耳機輸入一個電腦VGA輸入口：VGA接口一個數(shù)字系統(tǒng)接口：MONITOR系統(tǒng)接口一個 6系統(tǒng)工作原理介紹媒體盒采用的是PW118+PW2300+AD9880+SiI170B數(shù)字視頻處理系統(tǒng)。射頻信號經(jīng)高頻頭解碼得到的Video和其它的Video信號通過視頻電子開關(guān)切換后與Y-C信號，YPbPr分量信號,和模擬的RGB視頻信號一起通過PW2300視頻解碼后輸出24位的數(shù)字RGB信號給PW118進行SCALE處理，同樣HDMI信號經(jīng)過AD9880解碼后輸出24位數(shù)字RGB信號給PW

4、118進行SCALE處理。PW118處理后輸出的TTL 數(shù)字RGB信號經(jīng)SiI170B編碼后轉(zhuǎn)為TMDS數(shù)字視頻信號通過系統(tǒng)線送給Monitor進行顯示。7系統(tǒng)工作原理介紹Monitor視頻采用GM5020+MCU(M6759)+DS90C385方案。GM5020將媒體盒送過來的TMDS信號和另一路模擬RGB信號進行解碼和SCALE處理后輸出24位TTL RGB數(shù)字信號給DS90C385轉(zhuǎn)換成PDP顯示所要求的LVDS信號。音頻采用M62429+TP3001.音頻信號通過M62429進行音量控制，再送TP3001進行功率放大.8視訊盒系統(tǒng)框圖AV1AV2VGADVBHDMIM52797AVSW

5、ITCHPI5V330VIDEOSWITCHsdramN801PW2300VIDEODECODERflashN602PW118ScalerN208AD9880ddrN601Sil170BSYSTEM CABLEAVOUTTUNERHDCP EDIDYPbPr1YPbPr29視訊盒音頻處理框圖YPbPr2 R/LYPbPr2 R/LHDMIN208AD9880DACPCM1742DVB-R/LTUNERLA72700RFSYSTEM AUDIO OUTSWM52797AUDIOR2S15900N106N601Sil170BAV1-R/LAV2-R/L10Monitor系統(tǒng)框圖SCALERGM50

6、20N381EDID385TTLLVDSSDRAMN501SDRAMN502SDRAMN503MCUM6759N302AMPTPA3001Vol ctrlM62429Keypad &IRMUTEBL CtrlSYS AudioAudio InputAudio R/LSYS CABLE11視頻處理芯片PW118SDTV(NTSC/PAL/SECAM)&HDTV(1080i) Deinterlace 2:3 & 2:2 film modeNoise reduction256-point gamma table with 10-bit precisionFlesh tone correctionHa

7、rdware and CPU-enabled Teletext, V-Chip, and Closed Caption supportMulti-region, non-linear scalingDigital Luminance TransientImprovement (DLTI)Digital Chroma TransientImprovement (DCTI)1213VIDEO DECODER PW2300 Optional 3D comb filter (with external memory) Color decoder for NTSC/PAL/SECAM and all s

8、ubstandards High-performance, adaptive 5-line comb filter Y/C separator Programmable digital anti-aliasing filters Internal Self Clamp and Self Coast control Automatic pedestal level setting Triple high-performance, 8-bit Analog-to-Digital Converter Up to 150 MSPS conversion rate Interlaced or progr

9、essive inputs Supports Sync-on-Green (SOG) and Composite sync inputs Integrated PLL generates pixel clock from HSync Flesh Tone Correction14PW2300內(nèi)部系統(tǒng)框圖15AD9880簡介Analog/HDMI Dual InterfaceSupports High-Bandwidth Digital Content ProtectionRGB to YCbCr two-way color conversionAutomated clamping level

10、adjustment1.8/3.3V Power Supply100-pin LQFP Pb-Free PackageRGB and YCbCr Output Formats16AD9880系統(tǒng)接口Analog Interface8-bit Triple Analog to Digital Converters150 MSPS Maximum Conversion RateMacrovision Detection2:1 Input MuxFull Sync ProcessingSync Detect for “Hot Plugging”Mid-Scale ClampingDigital Vi

11、deo InterfaceHDMI v1.1, DVI v1.0150 MHz HDMI ReceiverSupports High-Bandwidth Digital Content Protection(HDCP 1.1)Digital Audio InterfaceHDMI 1.1 compatible audio interfaceS/PDIF (IEC90658 compatible) digital audio outputMulti-channel I2S audio output (up to 8 channels)1718GM5020功能介紹Zoom and scaling (all resolution from VGA to UXGA)Frame rate conversion Integrated 8 bit triple-channel ADC/PLLIntegrated genesis ultra-reliable DVI receiver(DVI 1.0) 165MhzIntegrated HDCPSimplifies OSD creation Programmable gamma correctionHue,saturation, brightness ,contrast and gamma control for RGB and YUV s