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故障现象:一台爱琴(SONKEN)VCP-S610CK型VCD机,能读碟片,有音频信号输出,无视频信号输出。分析检修:该机采用SONY机芯,SONY212B激光头。电路采用了索尼公司的CXD2540作信号处理,视频解码采用了华帮(Winbond)解压板,由W9925解码后,分为音频和视频两路数字信号,音频信号由BB公司PCM1725作D/A转换后经一块JRC4558双运放滤波和放大后输出,视频信号经W9950P进行视频解码后输出模拟的视频信号。读碟和音频信号输出正常说明
Symptoms: a Aegean (SONKEN) VCP-S610CK VCD machine, can read discs, audio signal output, no video signal output. Analysis and maintenance: The machine uses SONY movement, SONY212B laser head. The circuit uses Sony’s CXD2540 for signal processing, video decoding using Hua Bang (Winbond) decompression board, decoded by the W9925, is divided into two digital audio and video signals, the audio signal by the BB PCM1725 for D / A conversion After a piece of JRC4558 dual op amp filtering and amplification output, the video signal output by the W9950P video decoding analog video signal. Read disc and audio signal output normal description