康佳LED42MS11PD绿灯亮不开机检修一例

yudabajiao

版号MST6M182 35015540 REV-00  屏LC42EUN（SD）（F1） 绿灯亮黑屏，本机键控和遥控均无效。检测各电压均正常。连接RT809F开机打印信息：
2016-12-7, 15:16:25
COM12, BaudRate:115200 bps, RXD: VGA->12,TXD: VGA->15, Printed by RT809F:


  SPI BOOT
Console Initial OK
Maria10: BD_MST006B_10AVS_10315
MIU: DDR2_800MHz
BIST_0 PASS.

55
[][]
0055


MIU Initial OK

重刷程序无果。疑N501至N502 DDR2数据传输电路有问题。经检测N501至N502之间的电阻排RA511的7-8脚开路，用一75Ω1/16W电阻直接焊在7-8脚。反复开关机和长时间开机，一切正常！修复后的开机打印信息如下：
2016-12-8, 12:18:42
COM12, BaudRate:115200 bps, RXD: VGA->12,TXD: VGA->15, Printed by RT809F:


  SPI BOOT
Console Initial OK
Maria10: BD_MST006B_10AVS_10315
MIU: DDR2_800MHz
BIST_0 PASS.

55
[23456789AB][23456789AB]
0066


MIU Initial OK

sar input test...


=MApi_PNL_SetBackLight DISABLE=


==INV_CTL_Off==
MDrv_PNL_Init u32PnlRiuBaseAddr = A0200000
MDrv_PNL_Init u32PMRiuBaseAddr = A0000000


=msAPI_GPIO_RegisterGPIOMethods=
GE_SetOnePixelMode


====================
First GOP driver instance, flush GWIN HW
====================


PM Wakeup by 0xFF

+++++++g_IPanel.Enable-off+++++++++= = 150

s8SN0(68) s8SN1(67)
g_u8DCOnOff = OFF

POWERON_MODE_SAVE >>
+++++++g_IPanel.Enable-on+++++++++= = 113


=MApi_PNL_SetBackLight ENABLE=


==INV_CTL_On==



g_u8TransientBacklight = 100


bPictrueTest == 0
22 msAPI_Logo_LoadJpeg failed
load co-processor code

$$$$chaneg source!

------KTV PreScale------

=0=SET AV AV OUT SEL=


[Photo tCropWin] x = 0, y = 0, w = 780, h = 438
[Photo tDstWin] x = 0, y = 0, w = 780, h = 438
=====================
sound test
=====================
stGenSetting.g_SoundSetting.Volume=93Disable Aeon

Disable Aeon Done

DSP code loaded successfully

#EnableEQ
----else----

$$$$chaneg source!

=0=SET AV AV OUT SEL=


$$$$chaneg source!

=0=SET AV AV OUT SEL=

after preinit----sentesu stGenSetting.g_SysSetting.fKeypad=0


====================================
========= CUS04_ATV_MM_M10 =========


DVB-T Software Version: 0.305665



[Board]: BD_MST6M182_KONKA_PR_3D

[Panel]: LG42_LC420EUNSDF1

[Tuner]: AFT7W006

[MEMORY_MAP]: MMAP_128MB

[DRAM SIZE]: 128 MB

[FLASH SIZE]: 4 MB

[ATV]: PAL

[Mirror]: 0

[ENABLE_PWS]: 0

[ENABLE_POWER_SAVING_DPMS]: 1

[DEMO_FINE_TUNE]: DFT_STD_FULLHD_CMO216

[ENABLE_DLC]

[MWE]

[DISPLAY_LOGO]
====================================
******** VCap = 576, PreVtt = 625

yyluan168

好贴，感谢技术贴分享。

124241812

感谢楼主经验分享

季良付

感谢楼主师傅分享的经验

124241812

多谢楼主分享