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旧 Oct 15th, 2017, 15:28     #1
vodomore
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默认 拯救Marantz 1152DC

再来一贴

看有个老外发帖问,主动请缨,帮他restore机器。主要是看到马机老机器那么贵,好奇。当然1152并不是很贵,只是想看看那个年代的东西。7*年的机器,日本造。

电路板看起来“脏”,其实是那个年代的电路板漆就那样,机器稍微有点灰。3、4十年没清洁过,还是很不错的。
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旧 Oct 15th, 2017, 15:30   只看该作者   #2
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默认

老机器我从来不敢拿来就开机,换电容先。
原机18000uf/55V个头很大,得找同品牌(起码声底差不多),体积差不多的。

看看3、4十年的电容怎样。漏的差不多了。这样开机肯定会有问题,搞不好烧机器。
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旧 Oct 15th, 2017, 15:31   只看该作者   #3
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默认

电容漏液有腐蚀性。得好好清理。
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旧 Oct 15th, 2017, 15:34   只看该作者   #4
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默认

Fader 清洁处理
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旧 Oct 15th, 2017, 15:35   只看该作者   #5
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默认

继电器清理
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旧 Oct 15th, 2017, 15:37   只看该作者   #6
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默认

2个月后...顶的电容到了。和原机(塑料袋内)大小一样。容量更大些22000uf.
装到机器上看看。
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旧 Oct 15th, 2017, 15:40   只看该作者   #7
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默认

机器装回去了。
测量电压、中点什么都正常....再连接喇叭
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旧 Oct 15th, 2017, 15:47   只看该作者   #8
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默认

问题来了。放音一声道有破音,像接触不好似的...

经过排除,最终确定是功放板坏了,具体是推动管那里。估计是机主在机器电容已经状态很不好的情况下还开机,把管子干掉了。
老松下管子找不到,只好用东芝管,先换掉坏的声道,问题解决,听起来没什么大不同,而后两声道全换成东芝管。

这个机器最热的地方就是推动管那里。很担心那么小的散热片哦。大管那里温度倒是很低。

我这个半电子文盲能解决这个问题,纯属幸运啦。

马家老机,可能是面板给人“工业”感,辣么复杂,有人好这口。

1152声音还是不错的,比我的PM7000强一大截。
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旧 Dec 30th, 2017, 07:47   只看该作者   #9
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默认

继电器如何拆的?
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旧 Feb 21st, 2018, 11:31   只看该作者   #10
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默认

牛笔

Shooting 是一门技术
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