接修一台海信H55E3A液晶电视(RSAG7.820.9250主板,MSD6A648机芯),故障表现为开机5分钟后死机,拆机测量DC-DC LDO是否异常,无异常,U盘升级主程序未能排除故障,用串口工具观察打印信息分析;打印信息如下:
MIU0_DQS-OK
BIST0-OK
BIST1-OK
#_m
armfwNOTICE: BL3-1: v1.1(debug):e9dbd72
NOTICE: BL3-1: Built : 14:07:05, Mar 18 2017
XU?andled Exception in EL3.
x30 = 0x000000003de2a004
x0 = 0x0000000033000097
x1 = 0x000000001f201300
x2 = 0x00000000000000c5
x3 = 0x0000000000000002
x4 = 0x0000000000000000
x5 = 0x000000003de34548
x6 = 0x0000000000000000
x7 = 0x00000000a0000000
x8 = 0x000000000000ffff
MIU0_DQS-OK
BIST0-OK
BIST1-OK
#_m
armfwNOTICE: BL3-1: v1.1(debug):e9dbd72
NOTICE: BL3-1: Built : 14:07:05, Mar 18 2017
XU?andled Exception in EL3.
x30 = 0x000000003de2a004
x0 = 0x0000000033000097
x1 = 0x000000001f201300
x2 = 0x00000000000000c5
x3 = 0x0000000000000002
x4 = 0x0000000000000000
x5 = 0x000000003de34548
x6 = 0x0000000000000000
x7 = 0x00000000a0000000
x8 = 0x000000000000ffff
上述打印信息为EMMC损坏,元件型号H26M41204HPR,位号N56,更换重新写入数据后故障修复。
版权声明:本文为转载文章,版权归原作者所有,欢迎分享本文,转载请保留出处!