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2.存储器的检修要点解码芯片外围的存储器(包括:只读存储器 ROM、动态存储器 DRAM)是完成解码、解压的关键元件。当存储器损坏时,不能完成解码、解压工作,影响音、视频的恢复,此时播放机虽然伺服及显示功能仍为正常,但就是不能输出正常的音、视频。一体化板的 ROM、DRAM 存储器损坏,还可能出现“死机”故障。另外,当 DRAM 损坏时,有时在播放过程中图像出现停顿、“马赛克”斑块断层、有蓝屏无开机画面、多画面播放时有点状干扰等故障现象。在检查只读存储器和动态存储器时,应先测其电
2 memory repair essentials decoding chip peripheral memory (including: read-only memory, dynamic memory DRAM) is the key to complete the decoding and decompression components. When the memory is damaged, it can not finish the decoding and decompression work, which will affect the recovery of audio and video. At this moment, although the servo and display function of the player is still normal, it can not output the normal audio and video. Integrated board ROM, DRAM memory is damaged, may also “crash” failure. In addition, when the DRAM is damaged, sometimes there is a pause in the image during playback, a “mosaic” plaque fault, a blue screen without a power-on image, and a bit-like interference during multi-screen playback. Check the read-only memory and dynamic memory, you should test the power first