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近年来,许多新型彩电都采用了PC总线控制方式,大大简化了外围电路,提高了整机性能。但这也给广大检修人员带来了一些困难——有些故障靠换元件是排除不了的。笔者在检修这些类型的彩电方面的经验及技法介绍如下: 1.检修前应了解所检修的电视机中有哪些集成块受I~2C总线控制,以及每块电路控制哪些参数,并了解进入调整状态的方法。 2.检查I~2C总线中各项数据是否与原始值相同。 3.检查CPU中的SDA(数据线)、SCL(时钟线)的
In recent years, many new color TVs have adopted the PC bus control mode, which greatly simplifies the peripheral circuits and improves overall performance. But this also brought some difficulties to the majority of maintenance personnel - some failure to replace elements can not be excluded. The author in the maintenance of these types of color TV experience and techniques are as follows: 1. Before maintenance should be aware of the overhaul of the TV which blocks are controlled by I ~ 2C bus, and each circuit control which parameters and understand the adjustment State of the method. 2. Check I ~ 2C bus in the data is the same as the original value. 3. Check the CPU in the SDA (data line), SCL (clock line)