[问答]

HP8751A通道A和B过载错误

问答对人有帮助，内容完整，我也想知道答案 0 大家好，我有HP8751A有一些问题。在我拿到它之前，我的朋友已经修好了，因为在PSU中烧了一个“保险丝电阻”。他更换了它，8751A在PSU机外工作正常。当他把PSU放入机器并修好它在电源之后出现了“通道A和B过载”。再次移除机器外的PSU后没有恢复。我猜想第一次安装PSU后出现问题，但不知道。所以我不知道谁可以帮助解决这个问题，并且在keyight中找不到HP8751A服务手册，但是我问过keyight库的东西，Le，他说他们保留了原始文件，但只有纸张，没有扫描。如果有人可以提供这个扫描文件，我将非常感激。谢谢Mark / BH7JUO 以上来自于谷歌翻译以下为原文 Hello everyone, I have HP8751A with some issue.Before I got it my friend has repaired it because a "fuse resistor" was burned in PSU.He replaced it and 8751A worked fine with PSU outside machine.When he put PSU into machine and fixed it,it came out "channel A nad B overload" after power-on.It wasn't recoverd after removed PSU outside machine again.I guess that something broke down after installed PSU first time,but with no idea. So I don't know who can help this problem,and HP8751A service manual is no found in keysight,but I asked keysight library stuff, Le, he said they keeping this original document but only paper,no scan.If anyone can offer this scan files,I will really appreciated. Thank you Mark/BH7JUO 0
2018-9-20 11:17:49　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × kingnet_52040 该类别下有 195 个回答。邀请回答 60user7 该类别下有 81 个回答。邀请回答蓝色冰汐该类别下有 45 个回答。邀请回答醉狼工作室该类别下有 41 个回答。邀请回答 ianwhoani 该类别下有 30 个回答。邀请回答 dkhwakd 该类别下有 25 个回答。邀请回答 aaabbb567 该类别下有 23 个回答。邀请回答 e08506806 该类别下有 20 个回答。邀请回答 szzjfyp 该类别下有 18 个回答。邀请回答 sonia87 该类别下有 16 个回答。邀请回答 ningee 该类别下有 16 个回答。邀请回答 zouqinxiang 该类别下有 15 个回答。邀请回答 xj5548 该类别下有 15 个回答。邀请回答 daichuangs 该类别下有 14 个回答。邀请回答 derek88 该类别下有 14 个回答。邀请回答 hzmbs2016 该类别下有 12 个回答。邀请回答 JST2006 该类别下有 12 个回答。邀请回答 juujwfdf 该类别下有 11 个回答。邀请回答 bisong13 该类别下有 11 个回答。邀请回答 hu_wflllllllg21 该类别下有 11 个回答。邀请回答举报李泓翔相关推荐 • HP 4155A错误 2296 • 为8510 VNA寻找旧的HP 85161A/B测量自动化软件的副本 972 • HP3458A错误消息 4458 • HP 8562A频谱分析仪连接错误GPIB 82357B 3150 • 与HP3458A DMM建立连接收到以下错误消息 1226 • 跟踪发生器HP 70300A怎么重新校准 1441 • HP4155A错误代码 3419 • 通过GPIB进入显示器显示单元是HP83640A和本机上的不同串行 1597 • B1500a怎么从缓冲存储器中读取测量数据 1526 • 只有通道B内存工作，通道A给出POST错误“没有安装内存” 3060 1个回答

答案对人有帮助，有参考价值 0 我只是成功修复了我的8751A并且现在工作正常。我检查了主PSU，这个型号和原理图非常类似于HP8753A / B模块，但是8751还有一个输出线。这没问题。接下来我发现了post reg（08751-66540）），大部分输出LED在上电后闪烁一次但没有连续输出，我考虑了一些保护信号导致它。我仔细检查了这块PCB并将其与HP8753A / B原理图后的比较，发现它们有一些共同的设计方法，但是有些是真的不同。所以我试图找到哪个信号导致保护。我终于发现其中一个从机器后面的FAN出来，黄线，如果这条线上升到5V，这意味着FAN没有工作。这次FAN真的没有我和FAN电源线一起检查了一下，发现寄存器板上有一个熔断器（1A）烧坏了。我用一个保险丝替换它，重新上电，它工作正常并做了非常尖锐的测试。我非常感谢keyight库Le，他帮我找到了库书库上的8751服务手册，即使没有扫描文件。我希望这种修复可以帮助那些需要帮助的人。以上来自于谷歌翻译以下为原文 I just success repaired my 8751A and it worked fine now.I have checked main PSU,this model and schematic extremely similar to HP8753A/B module but 8751 with one more output line.It's no problem.Next I found post reg(08751-66540),most of output LED flashed once after power-on but no continuous output,I considered some protect signal cause it.I checked this PCB carefully and compare it with HP8753A/B schematic post reg,found they have some common design method,but some are really different.So I tried to find which signal cause protection.I finally found one of them come out from FAN behind mechine, yellow line,if this line rise up to 5V,it means FAN no working.This time FAN really no working.I checked along with FAN power line,and found a fuse resister(1A) on post reg board was burned.I used a fuse to replace it,repower-on,and it worked fine and made very sharp test. I really appreciated keysight library Le,he helped me find 8751 service manual on library bookbox,even if no scanfiles. I hope this repair can help people who need help like this.

2018-9-20 11:26:11 评论举报李泓翔