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15-智能电视主板维修教程分享-重大新功能推送(二)

iFix爱修 623

前言:

目前你们对“star638magnet”大概比较关心,小伙伴们都想要了解一些“star638magnet”的相关资讯。那么小编同时在网摘上搜集了一些对于“star638magnet””的相关知识,希望你们能喜欢,我们快快来了解一下吧!

上一节iFix君跟大家聊到离线座烧录方式,指定地址烧录功能是不是很实用?其实不管是在线还是离线都有指定地址烧录功能,这个功能不仅仅是烧录引导,还有很多用途,我们一起来开发它吧!比如iFix君在应用中发现指定地址擦除功能就非常好用。

例如MST串口关闭的主板,我们从打印上能看到的信息并不多,我们先来看看下面这段打印。

UART_115200

AC_ON

BIST0-OK

BIST1-OK

_U

Relocation Offset is: 01200000

[AT][MB][start ub][398]

U-Boot 2011.06-00003-g280119f-dirty (Apr 12 2017 - 10:34:54) MBOT-1106.0.10.1340012

msIR_Initialize

Function = SYSOpen, Line = 810, current resource pri_shm content is: 0

Function = SYSOpen, Line = 829, [SYS INFO] OPEN INSTANCE...

create instance at 2B6AE898 with private size 108 bytes at 2B6AE8E0

[MIU INFO] miu opencreate instance at 2B6AE950 with private size 80 bytes at 2B6AE998

create instance at 2B6AE9F0 with private size 48 bytes at 2B6AEA38

uboot held at [2B3DDF60~2CD00000],size=019220A0

CPU : Monet

Board: BD_MST087B_E42_MONET

DRAM: 205 MiB

Now running in RAM - U-Boot at: 2BE00000

eMMC: HS200 200MHz

eMMC 3.68 GB [75FFF8h]

UART BUS OFF!!

这一段就是看尚C32KD110电视高安638主板串口关闭后的打印,在实际维修中,最常见的故障莫过于卡在开机画面,俗称卡logo,从卡logo的故障现象来说,主要也分为软件故障(软件自身出错)和硬件故障(软件运行环境),串口关闭后我们就看不到完整的打印,也就看不到故障点在哪。当然,维修中我们通常也会先易后难,先升级软件,升级软件不能排除故障后,再去维修硬件!

串口关闭后想升级主程序怎么办?因为串口关闭后就不能进入控制台了,也就没办法执行升级命令,MStar单EMMC串口开关的标志位,通常在600000-7FFFFF之间,知道这个位置,我们就可以读出来修改它,当然,读出来修改再写进去太麻烦,我们只是为了升级软件嘛!在文中说到:厂家mboot存放于boot1区和EMMC的user区200000-3FFFFF地址段,那么我们就可以把400000-最后的地址段数据全部擦除掉,这样一来串口标志位也就被我们擦掉,就可以进入控制台升级了!有的小伙伴会问,串口标志位在600000-7FFFFF之间,我只擦这一段行不行,行!只要你高兴,想擦多少擦多少!!

我们都是实战派!还是具体来搞一搞吧!!

先在公众号内回复0926更新最新升级包(非常重要),更新后才能玩!

电视型号:看尚C32KD110;

故障现象:开机卡logo,不能启动主界面;

主板板号:CV638H-E42;

1、找到CMD、CLK、D0这三个点,用iFix官方销售的ISP彩线分别焊接好CMD(紫色)、CLK(白色)、D0(绿色)、地(黑色)这四个点,断开CLK通讯,然后插入RT809H编程器ISP口;

2、打开RT809H操作界面,在输入芯片印字框内输入EMMC,下方右侧小框会弹出跟EMMC相关的小类,选EMMC_AUTO_ISP;

3、点左侧设置,弹出来的小框里,区域设置选择,选user;右边的地址选择初始地址填4,结束地址填4000;

4、板卡上电,点擦除,3FFFFF之后的所有数据都被擦掉;

擦除后的打印如下:

UART_115200

AC_ON

BIST0-OK

BIST1-OK

_U

Relocation Offset is: 01200000

[AT][MB][start ub][385]

U-Boot 2011.06-00003-g280119f-dirty (Apr 12 2017 - 10:34:54) MBOT-1106.0.10.1340012

msIR_Initialize

Function = SYSOpen, Line = 810, current resource pri_shm content is: 0

Function = SYSOpen, Line = 829, [SYS INFO] OPEN INSTANCE...

create instance at 2B6AE898 with private size 108 bytes at 2B6AE8E0

[MIU INFO] miu opencreate instance at 2B6AE950 with private size 80 bytes at 2B6AE998

create instance at 2B6AE9F0 with private size 48 bytes at 2B6AEA38

uboot held at [2B3DDF60~2CD00000],size=019220A0

CPU : Monet

Board: BD_MST087B_E42_MONET

DRAM: 205 MiB

Now running in RAM - U-Boot at: 2BE00000

eMMC: HS200 200MHz

eMMC 3.68 GB [75FFF8h]

In: serial

Out: serial

Err: serial

Net: No ethernet found.

Set MAC default

MAC: 0x0: 0x30: 0x1B: 0xBA:0x2: 0xDB

#######################################################################

#######################################################################

[AT][MBoot][Driver Init][506]

<env reload for CHECK_IF_MBOOT_DEFAULT_ENV>

mmc change mount : system

Failed to mount ext2 filesystem...

** Bad ext4 partition or disk - mmc 0:8 **

[ERROR] loadscript:757: No enough buffer or path fail(/etc/set_env) :

[src/MsUtility.c] [loadscript]

USAGE example: project_id_set 0x0000

MPOOL size : 0x200000

[ERROR] CheckSignature:1430: ********************************

[ERROR] CheckSignature:1431: !!SecureInfo ID compare fail

[ERROR] CheckSignature:1432: Please do sw upgrade

[ERROR] CheckSignature:1433: ********************************

[ERROR] LoadSignature:1240: Check signature fail

Check USB port[0]:

[USB] usb_lowlevel_init++

[USB] USB EHCI LIB VER: 2014.06.09

[USB] Port 0 is Enabled

[USB] TV_usb_init (UTMI Init) ++

[USB] UTMI Base 1F207500

[USB] UHC Base 1F204800

[USB] USBC Base 1F200E00

[USB] BC Base 1F246C00

[USB] config miu select [70] [B8] [FF] ][FF]

[USB] TV_usb_init--

[USB] Usb_host_Init++

[USB] No USB is connecting

[USB] USB init failed

[USB] usb_lowlevel_init--

Error, couldn't init Lowlevel part

Check USB port[1]:

[USB] usb_lowlevel_init++

[USB] USB EHCI LIB VER: 2014.06.09

[USB] Port 1 is Enabled

[USB] TV_usb_init (UTMI Init) ++

[USB] UTMI Base 1F207400

[USB] UHC Base 1F201A00

[USB] USBC Base 1F200F00

[USB] BC Base 1F246C40

[USB] config miu select [70] [B8] [FF] ][FF]

[USB] TV_usb_init--

[USB] Usb_host_Init++

[USB] No USB is connecting

[USB] USB init failed

[USB] usb_lowlevel_init--

Error, couldn't init Lowlevel part

Check USB port[2]:

[USB] usb_lowlevel_init++

[USB] USB EHCI LIB VER: 2014.06.09

[USB] Port 2 is Enabled

[USB] TV_usb_init (UTMI Init) ++

[USB] UTMI Base 1F207200

[USB] UHC Base 1F227200

[USB] USBC Base 1F227000

[USB] BC Base 1F246C80

[USB] config miu select [70] [B8] [FF] ][FF]

[USB] TV_usb_init--

[USB] Usb_host_Init++

[USB] Async base addr: 0xCC92A80

[USB] Reg 0x28: 0x2A80 0xCC9

[USB] disable run

[USB] Host Speed:2

[USB] Host type:2

[USB] enable aynch

[USB] Usb_host_Init--

[USB] usb_lowlevel_init--

scanning bus for devices... [USB] control1 max:40

[USB] interface[0] conf:1 value FF:

1 USB Device(s) found

scanning bus for storage devices... 0 Storage Device(s) found

Check USB port[3]:

[USB] usb_lowlevel_init++

[USB] USB EHCI LIB VER: 2014.06.09

[USB] Port 3 is Enabled

[USB] TV_usb_init (UTMI Init) ++

[USB] UTMI Base 0

[USB] UHC Base 0

[USB] USBC Base 0

[USB] BC Base 0

[USB] config miu select [70] [B8] [FF] ][FF]

[USB] TV_usb_init--

[USB] Usb_host_Init++

[USB] No USB is connecting

[USB] USB init failed

[USB] usb_lowlevel_init--

Error, couldn't init Lowlevel part

FAIL : can not init usb!!

WDT is not Enable !!!setenv WDT_ENABLE 1 to enable it.

jump_to_console start!!

<< MStar >>#

通过上面这段打印信息,可以看出,串口已经被打开,由于内核被擦掉,开机自动检测升级文件,这时候我们只要插入含厂家升级软件的U盘,在控制台下输入cu或重启就会开始升级。

升级过程如下:

升级中。。。

启动中。。。

启动完成,软件升级成功修复主板。

按遥控器信号源+2580可以进入工厂模式,工厂模式里有一个Uart Enable为串口调试开关,调节遥控器左右键可以选择打开或关闭;

如果选择为开,重新上电即可查看到完成的打印信息!

看了以上玩法,以后还会为串口关闭而发愁吗?RT809H功能实在太多,让我们一起来开发并使用这些功能,一起总结分享更多的维修技巧,造福维修行业吧!今天的这个小经验有用吗?由于篇幅原因,下节接着为大家介绍新功能玩法!

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