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小米电视2S 48寸，型号为L48M3-AA，板号：DKTV-E-55-928-AE-20150129.
主芯片采用MSD6A928HP-8-002X，CPU Cortex A17四核1.4HZ主频，GPU Mall-760 MP44+4核。
DDR状态为DDR3，采用2GB 三通道结构。
EMMC采用东芝8G高速闪存，型号为：THGBMBG6D1KBAIL。
厂家U盘升级软件与小米电视2 55寸（L55M2-AA）通用，软件采用加密方式绑定主芯片唯一ID，更换主芯片或更换EMMC都需软件重新绑定，小米公司提供的U盘升级包为OTA用户升级包，能解决一小部分软件问题，但U盘升级包升级不好的情况下，只有一条出路，写入iFix团队制作的量产软件！
从市面上反映回来的信息看，不少用户咨询是否能关闭开机广告，所以量产软件特地采用低版本UI制作，无广告纯净版，如果需要升级到高版本，连接网络自行升级即可。
下面给大家介绍一下，维修此板需要掌握的一些知识。
串口打印：直接通过VGA口与编程器连接，线序为第一组，开机正常打印信息如下：
UART_115200
AC_ON MIU0_DQS-OK MIU1_MIST0-OK BIST1-OK BIST2-OK _U Relocation Offset is: 01100000 [AT][MB][start ub][352]
U-Boot 2011.06-00000-gdd6b2c3 (Jun 20 2017 - 01:49:44)
create instance at 57c75020 with private size 52 bytes at 57c75068
uboot held at [578ddf60~59300000],size=01a220a0 CPU : Monaco Board: BD_MST068D_10AHP_14222 HARDWARE ID: 0x4 DRAM: 915 MiB Now running in RAM - U-Boot at: 58300000
eMMC: HS400 200MHz eMMC 7.28 GB [E8FFF8h] db_table=1 No tcon_iic_read_ok HARDWARE ID with mirror: 0x204 In: serial Out: serial Err: serial Net: No ethernet found. MAC: 0x10: 0x48: 0xb1: 0xaf:0xfd: 0x13
[CPU INFO] cpu opencreate instance at 57c85528 with private size 44 bytes at 57c85570 CPUIoctl - MDrv_CMD_CPU_QueryClock [UTOPIA INFO] close moduleNames[38]: MODULE_CPU
cold boot,boot reason:wake_src is 0 turn on led tp_led_enable 42 failed tp_led_enable 50 failed tp i2c receive error msIR_Initialize AC on [AT][MBoot][Driver Init][490] MPOOL size : 0x200000 Writing to MMC(0)... 128 blocks written: OK 128 blocks written: OK done
Changelist: 24543697 ============= set bootargs =============== Hit any key to stop autoboot: 0 fore uup IRKey [0x0] tp_get_version 108 failed SAR key = 255 AC on dl_firmware mmc change mount : system Size of file "etc/bluetooth/BCM43569A0.hcd" from mmc device 0 partition system: 47770 bytes Loading file "etc/bluetooth/BCM43569A0.hcd" at offset 0x0 from mmc device 0 partition system 47770 bytes read File Length: 47770 start run_dl_fw() -- start to dl fw run_dl_fw() - download FW done mmc change mount : tvinfo Size of file "wake_on_ble.conf" from mmc device 0 partition tvinfo: -1 bytes wake_on_ble.conf get size failed build_rc_command failed with -1 mmc change mount : tvconfig Loading file "/config/PM.bin" at offset 0x0 from mmc device 0 partition tvconfig 24575 bytes read Wait for PM51 standby...........PM51 run ok...........UART_115200
STR_ON _U Relocation Offset is: 01100000 [AT][MB][start ub][331]
U-Boot 2011.06-00000-gdd6b2c3 (Jun 20 2017 - 01:49:44)
create instance at 57c75020 with private size 52 bytes at 57c75068
uboot held at [578ddf60~59300000],size=01a220a0 CPU : Monaco Board: BD_MST068D_10AHP_14222 HARDWARE ID: 0x4 DRAM: 915 MiB Now running in RAM - U-Boot at: 58300000
eMMC: HS400 200MHz eMMC 7.28 GB [E8FFF8h] db_table=1 No tcon_iic_read_ok HARDWARE ID with mirror: 0x204 In: serial Out: serial Err: serial Net: No ethernet found. MAC: 0x10: 0x48: 0xb1: 0xaf:0xfd: 0x13
[CPU INFO] cpu opencreate instance at 57c85528 with private size 44 bytes at 57c85570 CPUIoctl - MDrv_CMD_CPU_QueryClock [UTOPIA INFO] close moduleNames[38]: MODULE_CPU
cold boot,boot reason:wake_src is 5,wakeup pin(INT) is high bt wakeup gpio level is high turn on led tp_led_enable 42 failed tp_led_enable 50 failed tp i2c receive error msIR_Initialize DC on In HAL_AUDIO_SetDspBaseAddr, line(4736), u8Index(0x0), u32Bin_Base_Address(0x0), u32Mad_Base_Buffer_Adr(0x3ab97000)
In HAL_AUDIO_SetDspBaseAddr, line(4736), u8Index(0x1), u32Bin_Base_Address(0x0), u32Mad_Base_Buffer_Adr(0x3aa17000)
In HAL_AUDIO_SetDspBaseAddr, line(4736), u8Index(0x2), u32Bin_Base_Address(0x0), u32Mad_Base_Buffer_Adr(0x3a197000)
MDrv_AUDIO_SeSystemLoadCode() [======= initialize DEC-R2[0] SHM =======] [======= initialize DEC-R2[1] SHM =======] audio DSP_SE LoadCode success..[[utopia]] === HAL_MAD_SetDecCmd 0 fail=== MusicPath is boot0.mp3 mmc change mount : tvconfig Size of file "/boot0.mp3" from mmc device 0 partition tvconfig: 50890 bytes Loading file "/boot0.mp3" at offset 0x0 from mmc device 0 partition tvconfig 50890 bytes read ********Amplifier_Init ******Amplifier_TI5717_SWMute(0) ********Amplifier_Init 5717 done 1970-01-01 8:00:00 UTC is deep night [[utopia]] === HAL_MAD_SetDecCmd 11 fail=== [AT][MB][Play Melody][1301] create instance at 57c85528 with private size 344 bytes at 57c85570 MDrv_PNL_Init u32PnlRiuBaseAddr = 1f200000 MDrv_PNL_Init u32PMRiuBaseAddr = 1f000000 LINK TYPE = EXT [MDrv_PNL_SetPanelType][667] ATTENTION!!! Not support HW Training Mode
[MHal_PNL_Init_MOD][2109]Vx1 2 division [msReadEfuse][1689]u32Result=540000d3, after mask u32Result=40 [msReadEfuse][1689]u32Result=540000d3, after mask u32Result=13 [msReadEfuse][1689]u32Result=540000d3, after mask u32Result=13 [msReadEfuse][1689]u32Result=540000d3, after mask u32Result=13 [msSetVBY1RconValue][1725]u16temp= 13 Vx1 2 division[_MDrv_PNL_Init_LPLL][323]pstPanelInitData->u16Width=3840, pstPanelInitData->u16Height=2160 [_MDrv_PNL_Init_LPLL][325]u16HTotal=4400,u16VTotal=2250,pstPanelInitData->u16HTotal=4400,pstPanelInitData->u16VTotal=2250, u16DefaultVFreq=600 @@11=39 [_MDrv_PNL_Init_Output_Dclk][375]pstPanelInitData->u16Width=3840, pstPanelInitData->u16Height=2160 [_MDrv_PNL_Init_Output_Dclk][377]u16HTotal=4400,u16VTotal=2250,pstPanelInitData->u16HTotal=4400,pstPanelInitData->u16VTotal=2250, u16DefaultVFreq=600 @@11=39 @@11=39 [MApi_XC_MLG_GetStatus, 1652]No instance existed, please get an instance by calling MApi_XC_Init() first Init PWM2[msReadEfuse][1689]u32Result=540000d3, after mask u32Result=40 [msReadEfuse][1689]u32Result=540000d3, after mask u32Result=13 [msReadEfuse][1689]u32Result=540000d3, after mask u32Result=13 [msReadEfuse][1689]u32Result=540000d3, after mask u32Result=13 [msSetVBY1RconValue][1725]u16temp= 13 create instance at 57c856d0 with private size 1788 bytes at 57c85718 [XC,Version][0;36m [mMApi_XC_Init_U2, 1151, pXC_InitData->stPanelInfo.eLPLL_Type=51 Wait for PM51 standby DRAM ...........PM51 run ok...........mmc change mount : tvconfig Size of file "/boot0.jpg" from mmc device 0 partition tvconfig: 101722 bytes Loading file "/boot0.jpg" at offset 0x0 from mmc device 0 partition tvconfig 101722 bytes read create instance at 57c85e18 with private size 312 bytes at 57c85e60 [AT][MB][JPD Decode][1788]
[UTOPIA INFO] close moduleNames[35]: MODULE_NJPEG_EX
create instance at 57c85e18 with private size 1720 bytes at 57c85e60
[GOP INFO] gop opencreate instance at 57c86520 with private size 7756 bytes at 57c86568 [AT][MB][Show Logo][1856] [AT][MBoot][Driver Init][1859] MPOOL size : 0x200000 Writing to MMC(0)... 128 blocks written: OK 128 blocks written: OK done
Changelist: 24543697 ============= set bootargs =============== Hit any key to stop autoboot: 0 fore uup IRKey [0x0] tp_get_version 108 failed SAR key = 255 DC on [0;34m*******************************[0m [0;34m* tee Authentication SUCCESS !! *[0m [0;34m*******************************[0m [0;33mThe version of tee.bin is 00:00:00:00 [0mMPOOL size : 0x200000 [0;34m*******************************[0m [0;34m* boot Authentication SUCCESS !! *[0m [0;34m*******************************[0m [AT][MBoot][Boot Nuttx][3372] ## Booting kernel from Legacy Image at 25000000 ... Image Name: MStar-linux Image Type: ARM Linux Multi-File Image (uncompressed) Data Size: 7346266 Bytes = 7 MiB Load Address: 20208000 Entry Point: 20208000 Contents: Image 0: 5108152 Bytes = 4.9 MiB Image 1: 2238102 Bytes = 2.1 MiB ## Loading init Ramdisk from multi component Legacy Image at 25000000 ... -usb_stop(USB_PORT0) -usb_stop(USB_PORT1) -usb_stop(USB_PORT2) -usb_stop(USB_PORT3) -usb_stop(USB_PORT4) Loading Multi-File Image ... OK Disable UART
进入三清模式的方法有两种，一种是用遥控进入，一种是控制台下进入。
遥控方式进入：待机状态下，按住红外遥控的主页和菜单键，再按本机的开机键不松，直到出现三清界面。
控制台下进入：按住回车键不松，交流上电进入控制台，输入rec回车，然后输入res回车，自动进入三清界面。
厂家升级方式：厂家提供的U盘升级包两个文件放入U盘根目录，插入主板USB3.0口。然后按照三清模式的方法进入，开始自动升级。
iFix制作的量产软件支持离线和飞线写入，飞线写入时，点位图如下：
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发表于: 2018-5-23 16:25:37
发表于: 2018-5-23 18:22:41
