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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-D650Z
I am trying to troubleshoot a Sony Surround Amp that was given to me
more than two years ago that was bad, and I am just getting around to it now. I have a schematic, but most of the voltages I am reading seem to be okay or in range. The problem with the amp is that there is no output to the speakers or headphones, except for some low level extremely distorted audio on the left channel. Something is making the amp shutdown. I have already found two bad solder joints in the power section, but have not come up with anything else. Contrary to other posts about this unit I am NOT getting a "Protect" indicator. Any help appreciated or something to get me to the right area. Thanks, Mike |
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Sony STR-D650Z
Check the protection relay that the contracts are making proper contact. If
it is not that, you will have to get deeper in to the unit's operation. You should use a scope and audio generator. This will make it much easier to trace through to where the signals are stopping. -- Jerry G. ===== "Michael Fiedler" wrote in message ... I am trying to troubleshoot a Sony Surround Amp that was given to me more than two years ago that was bad, and I am just getting around to it now. I have a schematic, but most of the voltages I am reading seem to be okay or in range. The problem with the amp is that there is no output to the speakers or headphones, except for some low level extremely distorted audio on the left channel. Something is making the amp shutdown. I have already found two bad solder joints in the power section, but have not come up with anything else. Contrary to other posts about this unit I am NOT getting a "Protect" indicator. Any help appreciated or something to get me to the right area. Thanks, Mike |
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