40X 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 ............................................................................................................... 7
.......................................................................................................................................................... 8
2.1 底座 ............................................................................................................................... 8
2.2 后壳 ............................................................................................................................... 9
2.3 PCB .............................................................................................................................. 10
3.板卡说明 ..................................................................................................................................... 12
3.1 4K Display Mode ............................................................................................................... 12
3.1.1 标准配置 ................................................................................................................ 13
3.1.3 特性说明 ............................................................................................................... 15
3.1.4 接口定义 ............................................................................................................... 16
3.2 电源板 ............................................................................................................................. 19
3.2.1 电气特性 ............................................................................................................... 19
3.2.2 保险丝保护 ........................................................................................................... 20
4.模块详解及维修 ......................................................................................................................... 20
4.1 TV 模块 ............................................................................................................................. 20
1 HDMI 模块 ........................................................................................................................... 21
USB 模块 ................................................................................................................................. 22
7.3 AV IN 模块 ......................................................................................................................... 23
4 网口模块 ............................................................................................................................. 24
5 同轴模块 ............................................................................................................................. 24
6 功放模块 ............................................................................................................................. 24
4.8 电源模块维修指南 ......................................................................................................... 25
4.8.1 AC/DC 电源模块维修指南 .................................................................................. 25
4.8.2 LED 驱动电源模块维修指南 .............................................................................. 26
5.维修指南 ..................................................................................................................................... 27
5.1 花屏维修指南 ................................................................................................................. 28
5.2 白屏维修指南 ................................................................................................................. 28
5.3 黑屏维修指南 ................................................................................................................. 29
5.4 没声音维修指南 ............................................................................................................. 30
5.5 HDMI/CVBS 维修指南 ...................................................................................................... 30
................................................................................................................................................ 30
6.常见不良维修 ............................................................................................................................. 31
6.1 不开机 ............................................................................................................................. 31
6.2 无像 ................................................................................................................................. 32
6.3 无声 ................................................................................................................................. 33
6.4 像不良 ............................................................................................................................. 34
6.5 背光不亮 ......................................................................................................................... 34
6.6 网络无作用 ..................................................................................................................... 35
7.软件升级 ..................................................................................................................................... 36
7.1 本地 USB 软件升级 ................................................................................................................. 36
7.2 工厂菜单中 USB 软件升级 ..................................................................................................... 36
