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索尼采用I2C总线控制技术的系列彩电,具有I2C总线故障自检功能,当I2C总线系统检测到被控电路发生故障时,就会进入保护状态,同时采用指示灯闪烁的方式报告故障信息。另外,多数采用继电器控制市电限流电路的彩电,当I2C总线系统发生故障时,往往还伴有继电器的“嗒嗒”吸合声。当电视机能够正常开机后,有的机型还具有屏幕自检显示功能,按照该机的密码,依次按遥控器上的几个按键,即可进入故障自检显示状态。下面以索尼G3F机芯为例,介绍索尼系列I2C总线彩电保护电路的检修。
Sony series of color TV with I2C bus control technology, with I2C bus fault self-test function, when the I2C bus system detects the controlled circuit fails, it will enter the protected state, while the use of indicator light flashing way to report fault information. In addition, the majority of relays to control the color TV current limiting circuit, when the I2C bus system fails, often accompanied by relays “clatter ” pull sound. When the TV can boot normally, some models also have a screen self-test display, according to the machine’s password, followed by a few buttons on the remote control, you can enter the fault self-test display status. The following to Sony G3F movement, for example, introduces Sony Series I2C bus TV protection circuit overhaul.