维修经验分享-VGA (3)

按一下以編輯母片標題樣式,按一下以編輯母片,第二層,第三層,第四層,第五層,*,維修經驗分享,Repair experience to share,制造維修部,一，認識顯示卡,CRT Output,CRT Output,TV Output,Composite&S,TV Output,Composite&S-Video,LCD Output,TV Input,Composite&S,General Features,256-bit Graphic Architecture,20 Million Triangles/sec through T&L,350MHz RAMDAC,AGP 4X/2X,Supports 32MB SDRAM,S-Video In,SC-Video Out,Live VGA BIOS,Live VGA Driver,Software Support,Windows,95/98/2000/Me Display Driver,Windows,NT4.0,OpenGL,TM,ICD for Windows,NT and Linux,supported.,Bundle with MSI,TM,3DTooL,including MSI,TM,DVD and MSI,TM,3D!Turbo,TM,2001,Live VGA BIOS,Live VGA Driver,So Cool!,TV-Out(S),CRT Monitor,TV-Out(AV),Video-In(S),Jumper for Live VGA BIOS,MS-8833,n,VIDIA,GeForce2 MX-400,GPU,Power-PWM Regulator,Video,In/Out,DVI,D-SUB,(CRT),PCI/AGP Bus,VIVO,BIOS,R,B,G,DDR/DDRII/DDRIII,DDR/DDRII/DDRIII,TMDS,二，,Mira DRAM,4Banks*1M*32bits,8M*32,三,.1 High and Low Voltage,High voltage causes faster rising and falling signals and may cause more undershoot and overshoot,Low voltage causes slower rising and falling signals which may impact timing margins,3 voltages to schmoo and possibly a 4,th,FBVTT if the Memory is sensitive to termination.,NVVDD GPU Core Voltage,FBVDD Memory Core Voltage,FBVDDQ I/O Voltage,FBVTT only if required by the Memory Termination,三,.2 DVI Connecter,三,.3 Flash BIOS,Nvidia,nvflash,b filename,nvflash5-4-5-6,filename.rom,A,*nvflash5 d,查看,bios,資料,*,BIOS,biosver,查看,bios,版本,(05.41.02.17.15),ATI,flashrom,s 0 filename,flashrom,p 0 filename,*,flashrom,cr,0,查看,checksum,*debug,-dc000:0000 0150(0000-ffff),四,DEBUG TEST,Nvidia,1.mats,2.mats e 1(2 3.),3.mods s,WfMats.Run();WfMats.Status,(),(edit,mods.log,),4.,編輯一個批處理,.edit,filename.bat,.,mods,mfgtest.js,mfg,nvclk,*-,mclk,*-test 1%-,matsinfo,loops 2%-skip 60-time,.pause,.,edit,mods.log,*filename 10 5 (10-1%,測試,10083/10*fail 5-2%loop,測試,5,次,),ATI,1.,r3memid,nocfg,bit -,logext,1 2 3 4.,(edit r3memid.log),2.,編輯一個批處理,3.,調頻測試,.,setclk,查看頻率,.,setclk,eng 25000 -,mem,20000 (250MHz 200MHz),五常用的維修之方式和方法,1:,比較法,:,當不確定該信號是否正確時可用良品與不良品作訊號比較,2:,指壓法,:,可判斷,BGA CHIP,是否空焊,3:,觸摸法,:,觸摸零件是否異常發燙從而找出相關連的零件,4:,電表法,1:,用三用電表歐姆檔量排阻,(,電阻,),之阻值若變小則可能有線路或零件短路,反之則可能為排阻,(,電阻,),不良或周邊零件影響,.,5:,電表法,2:,用三用電表二極體檔可判斷,BGA CHIP,訊號點是否不良,(,電表之,+,極接,BGA,之,GND,極接欲量測之點,).,5.1 T01(D-SUB15,無畫面,),5.1.1,工作電壓是否正常,?(5V 3.3V 1.9V VDDR),5.1.2 27MHZ,晶振是否有頻率輸出,?,線路是否為開路或短路,?,5.1.3,確認,BIOS,數據是否正確。,5.1.4,檢查,BIOS,的,A0-A15,信號和其它相關線路是否為開路或短路,?,5.1.5,檢查,BGA AD0-31#,信號和相關線路是否為開路或短路,?,5.2 T02(D-SUB 15,有雜訊或顏色錯誤,),或,T03,及,T04,5.2.1 DACRED DACGREEN DACBLUE,輸出是否正常？是否為線路開路,短路或元件不良？,5.2.2,檢查記憶,CLK,頻率輸出,相關聯線路的電阻是否工作,?,5.2.3,檢查,SDRAM FBD0-FBD127,信號和相關線路。,5.2.4,檢查,BGA-SDRAM,控制線路是否短路或缺件,?,5.3 T05(VGA,供應商提供測試程式不良,),5.3.1 NVIDIA,功能測試不良代碼,(,詳見功能不良代碼表,).,5.3.2,查找線路是否為短路或開路。如檢測不出,則更換,BGA,。,5.3.3,依據測試程式進行測試,最后看測試的結果來判定是哪些信號線有問題,如有問題則對相關的零件進行更換,.,5.4 T06(DVI,無畫面,),5.4.1,檢測,DDC_5V,電壓是否正常,.,5.4.2,檢測,DVO_A_D0-DVO_A_D23,及各控制信號是否正常,.,5.4.3,檢測,RGB#HSYNC#YSYNC#,及,TX0#-TX5#,是否正常,.,5.4.4,檢測,DVI,接口是否有輸出,.,5.5 T07,或,T08,及,T09 DVI,接口顏色或畫面異,5.5.1,檢查,DVI,接口是否有接觸不良。,5.5.2,檢查,TXD0-TXD2+,的信號及到,DVI,接口之間的零件是否有問題,5.5.3,檢查,DVO_A_HSYNC,及,VSYNC,信號是否正常,.,5.5.4,槍查控制,IC,的信號及電壓是否正常,5.6 T10(S-Video,無畫面,),5.6.1,工作電壓是否正常,?(5V 3.3V 1.9V VDDR),5.6.2,檢查,Y/C#I2CC-SDA#I2CC-SDA#,是否為開路或短路,?,5.6.3,檢查,S/AV,接口是否有輸出,5.6.4,檢查,GPU,輸出至,S,端口的線路及零件是否正常,。,5.7 T25(VGA,記憶體容量顯示錯誤,),及,T24,5.7.1,測試,BIOS,線路的阻值與信號是否正常。,5.7.2,檢測,RAM FBD0-FBD127,信號和相關線路是否開路,短路,壞件。,(,有無連錫,短路,反向,),5.7.3,檢查各記憶體的輸入電壓,(FBVDD,及,FBVDDQ),及 時鐘信號是否正常。,六維修作業流程,