利用打印信息排除TCL液晶电视故障 (打印任务排序 算法)

液晶开机打印信息在我们维修液晶主板的过程中能为我们提供极大的便利，所以维修过程中查看打印信息应该做到常态化，下面我来谈两个利用打印信息维修的案例。案例1，TCLMSL机芯数字板故障表现为，开机电源板输出电压正常，主板上各路供电也是正常的，但是主板不输出背光开关信号，屏供电控制信号。维修步骤：接上串口升级版，配置好SECURECRT终端工具，通电开机，发现打印信息如下：SPIBOOTConsoleInitialOKMaria:BD_MSTB_*S_MIU:DDR_Mhz_2xB*T_0error.[][]MIUInitialOK分析：B*T_0error.是典型的DDR检测错误。但这个并不能说明就是DDR坏，因为第一个括号内部没有来自于主芯片的通讯信息，于是在检测完DDR的供电，参考电压后，大致测一遍主芯片于DDR相关的供电，发现正常之后果断更换主芯片，开机故障机修到这里，终于修好值得探讨。。案例2TCLMTC机芯故障表现为：主板各路供电正常，但是不开机，无背光开关信号，屏供电控制信号。检修步骤：该现象是典型的CPU工作不正常，于是开机查看打印信息。发现打印信息如下：Boot-DRAMChannelACalibration.Byte0CalFail.Byte1CalFail.DRAMInputDQSCalibrationfail!Byte0CalFail.Byte1CalFail.Byte0CalFail.Byte1CalFail.Byte0CalFail.Byte1CalFail.Byte0CalFail.Byte1CalFail.Byte0CalFail.Byte1CalFail.Byte0CalFail.Byte1CalFail.Byte0CalFail.Byte1CalFail.Byte0CalFail.Byte1CalFail.Byte0CalFail.Byte1CalFail.Byte0CalFail.Byte1CalFail.Boot-DRAMChannelACalibration.Byte0CalFail.Byte1CalFail.DRAMInputDQSCalibrationfail!Byte0CalFail.Byte1CalFail.Byte0CalFail.Byte1CalFail.Byte0CalFail.Byte1CalFail.Byte0CalFail.Byte1CalFail.Byte0CalFail.Byte1CalFail.Byte0CalFail.Byte1CalFail.Byte0CalFail.Byte1CalFail.Byte0CalFail.Byte1CalFail.Byte0CalFail.Byte1CalFail.Byte0CalFail.Byte1CalFail.相信有过相关经验的朋友都知道，Byte0CalFail.Byte1CalFail.DRAMInputDQSCalibrationfail!同样是典型的DDR与主芯片通讯*，由于该主板DDR为BGA封装更换和补焊难度较大，因此重点检测DDR的供电和参考电压正常后，对主芯片进行补焊，发现故障依旧。于是测量主芯片和DDR通讯的排阻，发现一个欧的排阻变值为1K多，更换该排阻后故障机修到这里，终于修好值得探讨。。机型TCLLEC机芯MST6M(MSJ5)故障现象指示灯红灯亮不开机维修过程：将主板上机架通电试机，发现主板上个路基本供电均正常，但指示灯呈待机红色，按按键遥控均无反应。主板无背光开关信号，以及屏供电开启信号输出。根据现象，基本能够判断出该故障系CPU工作不正常所致。连接上串口升级板，打开*PTOOL升级工具，发现点击连接后软件能够正常识别出FLASH芯片型号，这说明基本上可以确定主芯片MST6M的基本工作条条件问题应该不大。于是关机配置好SECCURECRT再开机获取打印信息如下：BOOTR2APINNT[][]很显然DDR部分工作异常，于是检测DDR的基本工作条件，发现供电1.8V正常，再测VREF参考电压发9现仅有0.V，这是显然错误的，该电压应为0.9V左右。电路也很简单如下抓图：

整理分享利用打印信息排除TCL液晶电视故障 (打印任务排序 算法)，希望有所帮助，仅作参考，欢迎阅读内容。

内容相关其他词:进行打印,编排打印,打印排序规则,利用打印信息排版文档,进行打印,打印任务排序 算法,打印任务排序 算法,打印任务排序 算法,内容如对您有帮助，希望把内容链接给更多的朋友！

测量R,R阻值无异常，A-MVREF对地阻值也无明显异常，怀疑C漏电，拆除后发现该电压升至0.9V正常。于是以为故障机修到这里，终于修好值得探讨。，通电试机发现依旧红灯亮不开机。。。郁闷！于是再次获取打印信息，如下：BOOTR2APINNT[ABCD][ABC]打印至此再无信息。很显然DDR部分通讯已无异常，那么为什么CPU内程序不再跑了呢？按说至此就该运行BOOT了啊，怀疑软件有问题。于是连上升级板对主板进行软件升级，升级完成后，开机故障机修到这里，终于修好值得探讨。。案例二。机芯。TCLMTC机芯故障表现为，机器通电主板上各路DC-DC输出电压均正常，但是不开机无背光开关信号，屏供电控制信号输出。很显然又是一例CPU工作不正常的。连接升级板，配置好SECCURECRT通电获取打印信息如下：Boot-DRAMChannelACalibration.Byte0:DQS(4~),Size,Set.Byte1:DQS(0~),Size,Set.DRAMASize=Mbytes.BootStartPmain0xa0NID=0x1df1adLZHSaddr:0xLZHSsize:0xLZHSchecksum:0xffBootStartLmainMTBootLoaderv0.9MUSBnoneSoftReset0x=0x.MUSBpBase=0xFinitok.MUSBnoneSoftReset0x=0x.MUSBpBase=0xFEinitok.Bootreason:A/Cpoweron!!LoadVGAinternalEDID.................DUMMYREADEDIDDATAFROMEEPROMLoadHDMIinternalEDID.................SIF_Master0:newdesignSIF_Master1:olddesignEEPROM_Read()0EEPROM_Read()1EEPROM_Read()2EEPROM_Read()3EEPROM_Read()4EEPROM_Read()5EEPROM_Read()6EEPROM_Read()7EEPROM_Read()8EEPROM_Read()9EEPROM_Read()failed###EEPROMreadloaderconfigfailed!!!Bootreason:A/Cpoweron!!TinitA/Concaseloaderstage...LoadTFW(addr:0xdd,size:)success!![Page]LDR_FlashCopy0xfxbxSwitchNANDpinmuxDetectNANDflashID:0x1DF1ADDetectHYU1G8F2BTRNANDflash(SLC):MBNAND_BDM_Mount:Partid=0,offset=0x0,size=0x[BDM]Partition:0,BadBlockCount:0DoUSBupgradeUSB:Vbusturnuptime=ms.NoUSBdevice.USBupgradestopEEPROM_Read()0EEPROM_Read()1EEPROM_Read()2EEPROM_Read()3EEPROM_Read()4EEPROM_Read()5EEPROM_Read()6EEPROM_Read()7EEPROM_Read()8EEPROM_Read()9EEPROM_Read()failedeepromwritefailed,return1Bootreason:A/Cpoweron!!---------testLYQcheckeepromboot-----------Bootreason:A/Cpoweron!!Org:0xFlags:0xEEPROM_Read()0EEPROM_Read()1EEPROM_Read()2EEPROM_Read()3EEPROM_Read()4EEPROM_Read()5EEPROM_Read()6EEPROM_Read()7EEPROM_Read()8EEPROM_Read()9EEPROM_Read()failed---------testLYQcheckeepromboot-----------EEPROM_Read()0EEPROM_Read()1EEPROM_Read()2EEPROM_Read()3EEPROM_Read()4EEPROM_Read()5EEPROM_Read()6EEPROM_Read()7EEPROM_Read()8EEPROM_Read()9EEPROM_Read()failedEEPROM_Read()0EEPROM_Read()1EEPROM_Read()2EEPROM_Read()3EEPROM_Read()4EEPROM_Read()5EEPROM_Read()6EEPROM_Read()7EEPROM_Read()8EEPROM_Read()9EEPROM_Read()failedEEPROM_Read()0EEPROM_Read()1EEPROM_Read()2EEPROM_Read()3EEPROM_Read()4EEPROM_Read()5EEPROM_Read()6EEPROM_Read()7EEPROM_Read()8EEPROM_Read()9EEPROM_Read()failedEEPROM_Read()0EEPROM_Read()1EEPROM_Read()2EEPROM_Read()3EEPROM_Read()4EEPROM_Read()5EEPROM_Read()6EEPROM_Read()7EEPROM_Read()8EEPROM_Read()9EEPROM_Read()failedEEPROM_Read()0EEPROM_Read()1EEPROM_Read()2EEPROM_Read()3EEPROM_Read()4EEPROM_Read()5EEPROM_Read()6EEPROM_Read()7EEPROM_Read()8EEPROM_Read()9EEPROM_Read()failedDisableVGAwakeupStandby!DRAMChannelACalibration.Byte0:DQS(4~),Size,Set.Byte1:DQS(0~),Size,Set.DRAMASize=Mbytes.BootStartPmain0xa0NID=0x1df1adLZHSaddr:0xLZHSsize:0xLZHSchecksum:0xffBootStartLmainMTBootLoaderv0.9MUSBnoneSoftReset0x=0x.MUSBpBase=0xFinitok.MUSBnoneSoftReset0x=0x.MUSBpBase=0xFEinitok.SIF_Master0:newdesignSIF_Master1:olddesignEEPROM_Read()0EEPROM_Read()1EEPROM_Read()2EEPROM_Read()3EEPROM_Read()4EEPROM_Read()5EEPROM_Read()6EEPROM_Read()7EEPROM_Read()8EEPROM_Read()9EEPROM_Read()failed###EEPROMreadloaderconfigfailed!!!Tchangetoloaderstage...LDR_FlashCopy0xfxbxSwitchNANDpinmuxDetectNANDflashID:0x1DF1ADDetectHYU1G8F2BTRNANDflash(SLC):MBNAND_BDM_Mount:Partid=0,offset=0x0,size=0x[BDM]Partition:0,BadBlockCount:0DoUSBupgradeUSB:Vbusturnuptime=ms.NoUSBdevice.USBupgradestopEEPROM_Read()0EEPROM_Read()1EEPROM_Read()2EEPROM_Read()3EEPROM_Read()4EEPROM_Read()5EEPROM_Read()6EEPROM_Read()7EEPROM_Read()8EEPROM_Read()9EEPROM_Read()failedeepromwritefailed,return1---------testLYQcheckeepromboot-----------Org:0xFlags:0xEEPROM_Read()0EEPROM_Read()1EEPROM_Read()2EEPROM_Read()3EEPROM_Read()4EEPROM_Read()5EEPROM_Read()6EEPROM_Read()7EEPROM_Read()8EEPROM_Read()9EEPROM_Read()failed---------testLYQcheckeepromboot-----------------[_LdrCheckEepromBoot]powermode=standby,irorbuttonwakeup---------A_MuteGPIO=releaseAMPmuteGPIO=careleaseEEPROM_Read()0EEPROM_Read()1EEPROM_Read()2[Page]EEPROM_Read()3EEPROM_Read()4EEPROM_Read()5EEPROM_Read()6EEPROM_Read()7EEPROM_Read()8EEPROM_Read()9EEPROM_Read()failedResetDemodGPIO=,0->1NANDloadlzhsheaderfrom0xtodram(0xfe),size=Decompressionubootto0xf...NANDloadimagefrom0xtodram(0xfe),size=0xcbbLZHShardwaredecodestartLZHShardwaredecodedoneStartingimage...U-Bootstarts...NANDFlash:DetectNANDflashID:0x1DF1ADDetectHYU1G8F2BTRNANDflash:MBMiBBootingsequenceisfromNANDFlashIn:serialOut:serialErr:serialSIF_Master0:newdesignSIF_Master1:olddesigneeprompara:(6ffc)u4MemLen:0xEEPROM_Read()0eeprompara:(6ffc)u4MemLen:0xEEPROM_Read()1eeprompara:(6ffc)u4MemLen:0xEEPROM_Read()2eeprompara:(6ffc)u4MemLen:0xEEPROM_Read()3eeprompara:(6ffc)u4MemLen:0xEEPROM_Read()4eeprompara:(6ffc)u4MemLen:0xEEPROM_Read()5eeprompara:(6ffc)u4MemLen:0xEEPROM_Read()6eeprompara:(6ffc)u4MemLen:0xEEPROM_Read()7eeprompara:(6ffc)u4MemLen:0xEEPROM_Read()8eeprompara:(6ffc)u4MemLen:0xEEPROM_Read()9EEPROM_Read()failedHitanykeytostopautoboot:0PartitionrootfsAdefinedatmtdparts:ID:6,Offset:0x,Size:0xLoadingfromnand0,offset0xAutomaticbootofimageataddr0x...##BootingkernelfromLegacyImageat...XIPKernelImage...OKOKStartingkernel...UncompressingLinux.......................................................................................done,bootingthekernel.Linuxversion2.6.(w.y@mtkvm)(gccversion4.4.2(GCCforMediaTek4.4.2-))#1PREEMPTSunJan::WETCPU:ARMv6-compatibleprocessor[fb]revision4(ARMv7),cr=cdMachine:MTMemorypolicy:ECCdisabled,DatacachewritebackCPU0:DVIPTwrite-backcacheCPU0:Icache:bytes,associativity4,bytelines,setsCPU0:Dcache:bytes,associativity4,bytelines,setsBuilt1zonelistsinZoneorder,mobilitygroupingon.Totalpages:Kernelcommandline:root=/dev/mtdblock7lpj=console=ttyMT0,n1mtdparts=mtxx-nand:1M(uboot),1M(uboot_env),1M(sigA),1M(sigB),2M(kernelA),2M(kernelB),5M(rootfsA),5M(rootfsB),M(basic),M(rw_area),k(perm),k(reserved),2M(channelsA),2M(channelsB),1M(pq),1M(aq),2M(logo)PIDhashtableentries:(order:8,bytes)Console:colourdummydevicexconsole[ttyMT0]enabledDentrycachehashtableentries:(order:3,bytes)Inode-cachehashtableentries:(order:2,bytes)Memory:MB=MBtotalMemory:KBavailable(Kcode,Kdata,Kinit)Calibratingdelayloop(skipped)presetvalue...BogoMIPS(lpj=)Mount-cachehashtableentries:CPU:Testingwritebuffercoherency:oknet_namespace:bytesNET:RegisteredprotocolfamilyNET:Registeredprotocolfamily2IProutecachehashtableentries:(order:0,bytes)TCPestablishedhashtableentries:(order:2,bytes)TCPbindhashtableentries:(order:1,bytes)TCP:Hashtablesconfigured(establishedbind)TCPrenoregisteredNET:Registeredprotocolfamily1NetWinderFloatingPointEmulatorV0.(doubleprecision)squashfs:version3.4(//)PhillipLoughermsgmniha*eensettoioschedulernoopregistered(default)Serial:MTdriver$Revision:#2$ttyMT0atMMIO0xfc(irq=)isaMTSerialttyMT1atMMIO0xfc(irq=)isaMTSerialttyMT2atMMIO0xf(irq=0)isaMTSerialttyMT3atMMIO0xfc(irq=)isaMTSerialbrd:moduleloadedcompcache:compcachesizenotprovided.Usingdefault:(%ofTotalRAM).[Page]U*pcache_size_kbyte*oduleparamtospecifycustomsizecompcache:Compressedswapsizesetto:KBTLSF:pool:c,init_size=,max_size=0,grow_size=PPPgenericdriverversion2.4.2PPPDeflateCompressionmoduleregisteredPPPBSDCompressionmoduleregisteredNET:RegisteredprotocolfamilyDetectNANDflashID:0x1DF1ADDetectHYU1G8F2BTRNANDflash:MBNANDdevice:ManufacturerID:0xad,ChipID:0xf1(HynixNANDMiB3,3V8-bit)cmdlinepartpartitionsfoundonMTDdevicemtxx-nandCreatingMTDpartitionson"mtxx-nand":0x-0x:"uboot"0x-0x:"uboot_env"0x-0x:"sigA"0x-0x:"sigB"0x-0x:"kernelA"0x-0x:"kernelB"0x-0xd:"rootfsA"Squshfs-mtdblock6:blocki*ad!0xd-0x:"rootfsB"0x-0xe:"basic"0xe-0x:"rw_area"0x-0x:"perm"0x-0x:"reserved"0x-0x:"channelsA"0x-0x:"channelsB"0x-0x:"pq"0x-0xa:"aq"0xa-0xc:"logo"TCPcubicregisteredNET:RegisteredprotocolfamilyVFS:Mountedroot(squashfsfilesystem)readonly.Freeinginitmemory:KINIT:version2.bootingMountinglocalfilesystems:mountmount:accordingto/proc/mounts,/dev/rootisalreadymountedon/Loading/etc/profile...Runningrc.local...net.ipv4.tcp_window_scaling=6#mountbasicUBIdevicenumber0,totalLEBs(bytes,.1MiB),available0LEBs(0bytes),LEBsizebytes(.0KiB)real0m0.suser0m0.ssys0m0.sUBIFS:recoveryneededUBIFS:recoverycompletedreal0m0.suser0m0.ssys0m0.sSIF_Master0:newdesignSIF_Master1:olddesignEEPROM_Read()0DTV>EEPROM_Read()1EEPROM_Read()2EEPROM_Read()3EEPROM_Read()4EEPROM_Read()5EEPROM_Read()6EEPROM_Read()7EEPROM_Read()8EEPROM_Read()9EEPROM_Read()failed[_read_project_id_from_eep]1:fail!!EEPROM_Read()0EEPROM_Read()1EEPROM_Read()2EEPROM_Read()3EEPROM_Read()4EEPROM_Read()5EEPROM_Read()6EEPROM_Read()7EEPROM_Read()8EEPROM_Read()9EEPROM_Read()failed[_read_project_id_from_eep]1:fail!!EEPROM_Read()0EEPROM_Read()1EEPROM_Read()2EEPROM_Read()3EEPROM_Read()4EEPROM_Read()5EEPROM_Read()6EEPROM_Read()7EEPROM_Read()8EEPROM_Read()9EEPROM_Read()failed[_read_project_id_from_eep]2:fail!![_read_project_id_from_eep]eerorThreeprojectidnotallsameprj_id_array[0]=,prj_id_array[1]=,prj_id_array[2]=EEPROM_Write()0EEPROM_Write()1EEPROM_Write()2EEPROM_Write()3EEPROM_Write()4EEPROM_Write()5EEPROM_Write()6EEPROM_Write()7EEPROM_Write()8EEPROM_Write()9EEPROM_Write()failed[_write_project_id_to_eep]1:0fail!!EEPROM_Write()0EEPROM_Write()1EEPROM_Write()2EEPROM_Write()3EEPROM_Write()4EEPROM_Write()5EEPROM_Write()6EEPROM_Write()7EEPROM_Write()8EEPROM_Write()9EEPROM_Write()failed[_write_project_id_to_eep]2:0fail!!EEPROM_Write()0EEPROM_Write()1EEPROM_Write()2EEPROM_Write()3EEPROM_Write()4EEPROM_Write()5EEPROM_Write()6EEPROM_Write()7EEPROM_Write()8EEPROM_Write()9EEPROM_Write()failed[_write_project_id_to_eep]3:0fail!![PrjAttributeInit]Readprojectidfail!!EEPROM_Write()0EEPROM_Write()1EEPROM_Write()2EEPROM_Write()3EEPROM_Write()4EEPROM_Write()5EEPROM_Write()6EEPROM_Write()7EEPROM_Write()8EEPROM_Write()9EEPROM_Write()failed[_write_project_id_to_eep]1:0fail!!EEPROM_Write()0EEPROM_Write()1EEPROM_Write()2EEPROM_Write()3EEPROM_Write()4EEPROM_Write()5EEPROM_Write()6由上述打印信息可以看出DDR,BOOT,NAND都基本上检测正常，唯独从EEPROM_Read()failed###EEPROMreadloaderconfigfailed!!!等处可以看出CPU对存储器的读写异常。于是测量存储器总线电压，发现SCL线仅1.2V，SDA线基本正常。对地测试SCL脚对地阻值，发现明显偏度，断开该总线上所连的CPU,以及高频头该阻值依旧很低，怀疑过孔漏电，于是割断过孔铜箔直接飞线连接。开机后SCL电压升至3.3V，开机一切正常。