Question about Grundig S350 AM/FM/SW Radio

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I get nothing

I use my radio in Guatemala with a 12V adapter and it has worked great for years. Now, I get nothing. I have tried it with the 120 cord as well. When I push the power button, nothing happens. Is there a fuse anywhere?

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I fixed it by exchanging the Glass Diode (D13) with another one.
(the old one was shorted to ground)

Posted on Aug 19, 2010

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I replaced the protection diode, a 10v zener, with a 9v from my junk box. This did not fix the problem, but as least I have 6vdc going into the radio now. Looking further ... maybe an onboard regulator got fried. Still no source for a schematic.

Posted on May 13, 2007

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I have one that I am repairing that has the same problem ... putting 12v on the 6v input shorts the protection diode to ground. I pulled the diode and found it to be shorted and currently sourcing a replacement. Since I don't have a schematic, I am guessing at the part number ... it is a 1N4xxx something, I think ... hard to read it. I'm pretty sure this is the only problem. If you are not an electronics tech, I don't recommend trying to replace the diode yourself. It requires a major disassembly of the radio.

Posted on May 13, 2007

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