50X 技术服务手册
2
目录
1．安全指南 .................................................................................................................................... 3
2.拆机图以及主板外观等 ............................................................................................................... 8
2.1 底座 ................................................................................................................................... 8
2.2 后壳 ................................................................................................................................... 9
2.3 PCB .................................................................................................................................. 10
3.板卡说明 ..................................................................................................................................... 14
3.1 4K Display Mode ............................................................................................................... 14
3.1.1 标准配置 ................................................................................................................ 14
3.1.3 特性说明 ............................................................................................................... 16
3.1.4 接口定义 ............................................................................................................... 17
3.2 电源板 ............................................................................................................................. 21
3.2.1 电气特性 ............................................................................................................... 21
3.2.2 保险丝保护 ........................................................................................................... 24
3.2.3 外观图 ................................................................................................................... 25
3.3.4 接口定义 ............................................................................................................... 25
4.模块详解及维修 ......................................................................................................................... 27
4.1 TV 模块 ............................................................................................................................. 27
4.2 HDMI 模块 ........................................................................................................................ 28
4.3 USB 模块 ........................................................................................................................... 29
4.4 AV IN 模块 ........................................................................................................................ 30
4.5 网口模块 ......................................................................................................................... 30
4.6 光纤模块 .......................................................................................................................... 30
4.7 功放模块 .......................................................................................................................... 31
4.8 电源模块维修指南 ......................................................................................................... 33
4.8.1 AC/DC 电源模块维修指南 .................................................................................. 33
4.8.2 LED 驱动电源模块维修指南 .............................................................................. 34
5.维修指南 ..................................................................................................................................... 36
5.1 花屏维修指南 ................................................................................................................. 36
5.2 白屏维修指南 ................................................................................................................. 37
5.3 黑屏维修指南 ................................................................................................................. 37
5.4 没声音维修指南 ............................................................................................................. 38
5.5 HDMI/CVBS 维修指南 ...................................................................................................... 38
6.常见不良维修 ............................................................................................................................. 39
6.1 不开机 ............................................................................................................................. 39
6.2 无像 ................................................................................................................................. 40
6.3 无声 ................................................................................................................................. 41
6.4 像不良 ............................................................................................................................. 42
6.5 背光不亮 ......................................................................................................................... 42
6.6 网络无作用 ..................................................................................................................... 43
7.USB 软件升级 .............................................................................................................................. 44
附件：1、维修电路图 2、爆炸图 3、bom 表
