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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Sony STR-DE635 recieiver won't power up
First off I'd like to say, "Hello." to the group. I hope I can gain
some knowledge from the group's collective input. I have a Sony STR-DE635 stereo receiver that will not turn on and I would like to investigate into maybe seeing if I can repair it. I found a set of schematics on this site which I believe will definitely help.(http://www.eserviceinfo.com/index.php?what=search2) I'm guessing but I think that the problem is related to the power supply? On p.13 of this .PDF manual it has an A/C and D/C schematic, this receiver has a seperate board for each. I probed the A/C board and found that it has voltage out to the "Digital" board of a little over 12 volts but when I try to test the pins on CNV902 I thought I should be getting appx. 110 A/C but only get appx. 2? CNV902 is a simple 2 wire connector leading directly to a transformer. My common sense is telling me that why would I need a transformaer the size of Kansas for only 2 volts A/C? So, I'm guessing this might have something to do with it? I could be in left field due to my lack of knowledge and inexperience, that's why I'm hoping you guy's/girl's can shed some light. Thanks for any suggestions or hints you can provide. |
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