求助-中道1000ZXL荧光屏幕显示满格问题

花开在春天

中道1000ZXL荧光屏幕显示问题

之前没有留意，在带电的情况下插入荧光屏的CN-21电缆，结果荧光屏幕在播放或是Source模式下，屏幕就满格。
这种屏幕不懂原理，该怎么检修。
CN-21的电路该怎么检查？Bar（L、R）、Dot(L、R）怎么跟踪？是交流信号还是啥？
发现IC604在维修手册有错误，1、6脚并不连通。

dupe

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taojiansh

如果会修理电路板，先检查能检查的原件，就是电压情况，电阻电容，有可能集成块坏。备用机拆块板子代换一下。确认了哪块板块坏，检查有关集成块。不熟悉的最好不要动，以免扩大故障。不知道集成块有卖吗。人和人不一样的，别人成功修理了，不代表自己可以成功。经验要积累的。要交学费的。这个是没有办法的。

花开在春天

taojiansh 发表于 2025-8-17 06:52
如果会修理电路板，先检查能检查的原件，就是电压情况，电阻电容，有可能集成块坏。备用机拆块板子代换一下 ...

小板子大问题，头大。

咝咝入扣

怕是带电拔插对电路造成冲击了。先找出电平信号输入端，测一下静态下输入端电压值是否为零；将输入信号对地短接看看电平指示有没有回落

yqx

交易区新帖推荐

这种要检查门电路，带电插拨西模丝集成块容易挂。

花开在春天

黑子2 发表于 2025-9-9 11:10
这机器好像还有个拉杆

2个把手，没有拉杆

花开在春天

咝咝入扣 发表于 2025-9-9 14:57
怕是带电拔插对电路造成冲击了。先找出电平信号输入端，测一下静态下输入端电压值是否为零；将输入信号对地 ...

现在遇到一个莫名其妙的问题。一个芯片TC4022BP出现一个12V电压，正常的情况应该是1.5V，现在无论如何都消除不到，导致信号满格。

花开在春天

yqx 发表于 2025-9-9 15:04
这种要检查门电路，带电插拨西模丝集成块容易挂。

把板子上的芯片都换一遍，问题依旧。头大

yqx

花开在春天 发表于 2025-9-9 15:27
把板子上的芯片都换一遍，问题依旧。头大

你把信号取样端接低电平如果还是老样子说明该板子有自激存在

yqx

看9楼图纸13脚应该是时钟端

花开在春天

yqx 发表于 2025-9-9 15:40
你把信号取样端接低电平如果还是老样子说明该板子有自激存在

应该是有自激，不知道该如何搞

lswj

这个显示屏电路真复杂

晓歌

测量无信号的情况下L  R信号输入是否正常。
检查ic605  4558是否正常

天籁的音

lswj 发表于 2025-9-9 18:44
这个显示屏电路真复杂

1000ZXL以及680ZX等荧光显示屏部件巨大，可能与当年中道显示屏技术跟不上SONY 等先进有关，因此显得相当复杂保守。
中道采用荧光显示屏型号很少。