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故障现象:伴音正常,无蓝屏,屏幕中央无“全数位影音光碟机”字样,纯洁光栅,无图像分析检修:该机为南方某厂于1997年3月生产,用户使用一年后,出现故障。据用户说:正常时,电视机屏幕上表现为蓝屏且屏中央有“全数位影音光碟机”字样,播放VCD碟片时“字样”消失后出现图像。根据CL48X解码芯片互锁原理,重点检查视频编码电路。在解码板上,从视频输出端逆向找出视频编码集成块U14(TDS6302)及相关元件。现在资料中查不到
Symptoms: normal sound, no blue screen, the central screen without “all-digital video CD-ROM drive,” the word, pure grating, no image analysis and maintenance: This machine was produced in March 1997 in the South plant, users use a year later, . According to the user said: Normal, the TV screen showed a blue screen and the central screen “all-digital video CD-ROM drive,” the words, play VCD disc “words” disappear after the image. According to CL48X decoder chip interlocking principle, focus on checking the video encoding circuit. On the decode board, video coding block U14 (TDS6302) and its associated components are located backward from the video output. Now the information can not be found