PDP原理及维修培训

1、PS42E7原理及维修培训研发中心 李明2007-4-281PS42E7系统介绍PS42E7是单通道PDP TV方案。在结构上采用媒体盒加Monitor方式。这样本机既是一台高清晰画质的PDP TV,又可单独作为PDP显示器使用。本方案媒体盒和Monitor之间信号传输采用TMDS格式的纯数字视频信号，以确保传输信号的带宽。支持HDMI数字视频信号，YPBPR/YCBCR高清信号及普通的RGB，VIDEO,S-VHS和NTSC射频信号输入。本机还带有一个DUB-9控制口可方便地对信号系统进行软件升级。2功能和规格PDP显示屏有效显示面积 93.294 cm (H)53.28 (V) cm (4

2、2 ),16:9象素852(H)480(V)彩色数1073.7 M对比度(典型) 10000:1亮度(典型) 1500 cd/m23功能和规格调谐方式频率合成调谐系统，模拟、数字存储200个频道调谐器单制式一体化电子，DVB-T一体化数字电视调谐器扬声器4 /10 W 二个4视讯盒接口数字电视广播输入口：RF输入口一个模拟电视广播输入口：RF输入口一个音频输入口：RCA 四组，耳机输入一个视频输入口：RCA 2个YpbPr/YpbPr输入口:RCA 两组S-VHS 输入口：一个数字视频输入口：19针 HDMI接口一个电脑VGA输入口：D15 机顶盒一个视频输出口：RCA一个音频输出口：RCA一

3、组，耳机输出口 一个数字系统接口：D30 机顶盒一个软件升级接口：D9 机顶盒 一个 5Monitor接口音频输入口：耳机输入一个电脑VGA输入口：VGA接口一个数字系统接口：MONITOR系统接口一个 6系统工作原理介绍媒体盒采用的是PW118+PW2300+AD9880+SiI170B数字视频处理系统。射频信号经高频头解码得到的Video和其它的Video信号通过视频电子开关切换后与Y-C信号，YPbPr分量信号,和模拟的RGB视频信号一起通过PW2300视频解码后输出24位的数字RGB信号给PW118进行SCALE处理，同样HDMI信号经过AD9880解码后输出24位数字RGB信号给PW

4、118进行SCALE处理。PW118处理后输出的TTL 数字RGB信号经SiI170B编码后转为TMDS数字视频信号通过系统线送给Monitor进行显示。7系统工作原理介绍Monitor视频采用GM5020+MCU(M6759)+DS90C385方案。GM5020将媒体盒送过来的TMDS信号和另一路模拟RGB信号进行解码和SCALE处理后输出24位TTL RGB数字信号给DS90C385转换成PDP显示所要求的LVDS信号。音频采用M62429+TP3001.音频信号通过M62429进行音量控制，再送TP3001进行功率放大.8视讯盒系统框图AV1AV2VGADVBHDMIM52797AVSW

5、ITCHPI5V330VIDEOSWITCHsdramN801PW2300VIDEODECODERflashN602PW118ScalerN208AD9880ddrN601Sil170BSYSTEM CABLEAVOUTTUNERHDCP EDIDYPbPr1YPbPr29视讯盒音频处理框图YPbPr2 R/LYPbPr2 R/LHDMIN208AD9880DACPCM1742DVB-R/LTUNERLA72700RFSYSTEM AUDIO OUTSWM52797AUDIOR2S15900N106N601Sil170BAV1-R/LAV2-R/L10Monitor系统框图SCALERGM50

6、20N381EDID385TTLLVDSSDRAMN501SDRAMN502SDRAMN503MCUM6759N302AMPTPA3001Vol ctrlM62429Keypad &IRMUTEBL CtrlSYS AudioAudio InputAudio R/LSYS CABLE11视频处理芯片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内部系统框图15AD9880简介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系统接口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功能介绍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